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Diagnostic Aids

WARNING: This page is about a different car, the 1995 Ford Windstar and 1995 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. Before continuing with this circuit test, ensure that the following areas are in good condition:

Fig 1: Testing Typical PCM Output Control Circuit (All Models)
G95J27234

1)  Intermittent Test Procedure

Proceed to the appropriate circuit test as follows:

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 1) to step 10). No test procedures have been omitted.

10)  Intermittent Input KOEO Wiggle Test

Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Turn ignition on. While observing PID value, wiggle and pull on component wiring and connector. Refer to appropriate PIN VOLTAGE CHART in appropriate PIN VOLTAGE CHART S article below in the ENGINE PERFORMANCE section. Lightly tap on component. If PID value(s) is okay, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace suspect component. If replacement component does not repair fault, install original component and go to next step.

11)  Leave ignition on with PIDs accessed. While observing PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. If PID value(s) remain within specification, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace PCM. If replacement PCM does not repair fault, install original PCM. Return to step 1) and choose another procedure.

12)  Intermittent Input KOER Wiggle Test

Leave ignition on with PIDs accessed. Access PIDs from the area of suspected wiring or component fault. Start engine and allow to idle. While observing PID value, wiggle and pull on component wiring and connector. Refer to appropriate PIN VOLTAGE CHART in appropriate PIN VOLTAGE CHART S article below in the ENGINE PERFORMANCE section. Lightly tap on component. If PID value(s) is okay, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace suspect component. If replacement component does not repair fault, install original component and go to next step.

13)  Leave engine running at idle speed with PIDs accessed. While observing PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. If PID value(s) remain within specification, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace PCM. If replacement PCM does not repair fault, install original PCM. Return to step 1) and choose another procedure.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 13) to step 20). No test procedures have been omitted.

20)  Intermittent KOEO Output Actuator Test

If no symptoms or trouble codes are present, perform road test procedure specified in steps 40) through 43). Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Record trouble codes in PCM memory, if present. Disconnect 104-pin connector from PCM. Install Breakout Box (014-000959). Connect positive lead of voltmeter to output control circuit of suspect component. Connect negative lead to ground. Turn ignition on. Enter scan tester's Output Test Mode. Activate suspect component. While observing voltmeter reading and PID value, lightly tap on component. Compare readings to specification. Refer to appropriate PIN VOLTAGE CHART in appropriate PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section. If readings are correct and remain stable within 1.0 volt, go to next step. If readings are incorrect or unstable within 1.0 volt, replace component. If replacement component does not repair fault, install original component and go to next step.

21)  Leave ignition on with PIDs accessed. While observing voltmeter reading and PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. Compare readings to specification. Refer to appropriate PIN VOLTAGE CHART in appropriate PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section. If readings are correct and remain stable within 1.0 volt, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If readings are incorrect or unstable within 1.0 volt, isolate fault and repair as necessary.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 21) to step 30). No test procedures have been omitted.

30)  Intermittent Water Check Procedure

Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Start engine and allow to idle. Spray water on suspect component, circuit and connector. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. If no faults occur, go to next step. If fault occurs, isolate and repair as necessary.

31)  With engine running, spray water on spark plugs, spark plug wires, ICM, CKP sensor and CMP sensor. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Refer to appropriate PIN VOLTAGE CHART in appropriate PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section below. If no faults occur, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If fault occurs, isolate and repair as necessary.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 31) to step 40). No test procedures have been omitted.

40)  Intermittent Road Test Procedure

This procedure will monitor PIDs and components using a scan tester on a road test. An assistant is necessary for some procedures.

This procedure is performed under 4 different conditions; KOEO, Engine running at idle speed, 30 MPH and 55 MPH. Compare information with specifications listed in appropriate PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section below. Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or fault. Compare values to KOEO values given in PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section below. Watch for fault indicated by PID value out of specification. If no faults occur, go to next step. If fault occurs, go to step 10) for input system fault or step 20) for output system fault.

41)  With scan tester connected to DLC, remain in PID access mode. Start engine and allow to idle. With engine warmed to operating temperature, watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to HOT IDLE values given in appropriate PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section. If values remain within specifications, go to next step. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault.

42)  Leave scan tester connected to DLC in PID access mode. Ensure all accessories are off. Using an assistant, test drive vehicle at 30 MPH. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to 30 MPH values given in PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section below. If values remain within specification, go to next step. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault.

43)  Leave scan tester connected to DLC in PID access mode. Test drive vehicle at 55 MPH. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to 55 MPH values given in PIN VOLTAGE CHART S article in the ENGINE PERFORMANCE section. If values remain within specification, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 43) to step 50). No test procedures have been omitted.

50)  Intermittent Ignition Test Procedure

Ensure all accessories are off. Perform QUICK TEST. If trouble codes are present, service as necessary before continuing. If no trouble codes are present, connect Intermittent Ignition Analyzer (007-000075) and go to next step. If intermittent ignition analyzer is not available, return to step 1) and choose another procedure.

51)  Turn ignition off. Ensure all accessories are off. Install correct overlay on front of tester panel. Install program cartridge in slot. Connect EI HIGH DATA RATE harness adapter to DIST tester. Ensure that CKP SIMULATION switch and WIGGLE TEST switch is off. Disconnect ICM wiring harness connector. Check connector terminals for damage or contamination and repair as necessary. Attach male ICM connector of tester to ICM wiring harness connector. Attach female ICM connector of tester to ICM. Turn ignition on and press tester RESET button. If tester performs self-test and VPWR LED comes on, go to step 53). If tester does not perform self-test or VPWR LED does not come on, go to next step.

52)  Scan Tester Check

Turn ignition off. Disconnect intermittent ignition analyzer. Connect jumper wire between VPWR terminal of tester and positive battery terminal. Connect jumper wire between PWR GND terminal of tester and negative battery terminal. If tester passes self-test, go to next step. If tester does not pass self-test, repair or replace as necessary and go to next step.

53)  Recreate Fault

Turn ignition on. Check Fault Memory and System Status LEDs. If LEDs are off, go to next step. If either LEDs are on, go to step 55).

54)  Ensure DIST is connected to vehicle. Test drive vehicle. If vehicle will not start, crank engine for 5 seconds. If Fault Memory and System Status LEDs are on, go to next step. If LEDs are off, fault cannot be identified with this procedure. Return to step 1) and choose another procedure.

55)  If COIL LED is off, go to next step. If COIL is on, go to step 80).

56)  If IGN GND LED is off, go to next step. If IGN GND is on, go to step 200).

NOTE: If IGN GND or CKP SHD LED comes on anytime during testing, go to step 200) for IGN GND or step 210) for CKP SHD.

57)  If CKP SHD LED is off, go to next step. If CKP SHD is on, go to step 210).

58)  If ICM OK LED is blinking, go to next step. If ICM OK LED is not blinking, go to step 95).

59)  If CKP BIAS LED is off, go to next step. If CKP SHD is on, go to step 120).

60)  If CKP SIGNAL LED is off during cranking, go to next step. If CKP SHD is on during cranking, go to step 130).

61)  If ICM LED is off, go to next step. If ICM is on, go to step 95).

62)  If ICM TACH LED is off, go to next step. If ICM is on, go to step 95).

63)  If CKP LED is off, go to next step. If CKP is on, go to step 130).

64)  If SPOUT LED is off, go to next step. If SPOUT is on, go to step 170).

65)  If PIP LED is off, go to next step. If PIP is on, go to step 150).

66)  With engine warm, if BASE TIMING LED is off, go to next step. If BASE TIMING is on, go to step 170).

67)  If COIL LEDs are flashing, go to intermittent ignition analyzer service manual for CKP SIMULATION TEST. If COIL LEDs are not flashing, fault cannot be identified with this procedure. Return to step 1) and choose another procedure.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 67) to step 80). No test procedures have been omitted.

80)  VBAT Circuit Check

Turn ignition off. Disconnect ignition coil packs. Connect Intermittent Ignition Analyzer (007-000075). Turn ignition on. Measure voltage between ignition coil pack wiring harness connector VBAT terminal and COIL jack of intermittent ignition analyzer. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, repair open in VBAT circuit.

81)  Turn ignition off. Measure resistance between IGN GND jack and COIL jack of intermittent ignition analyzer. If resistance is 6000 ohms or more, go to next step. If resistance is less than 6000 ohms, go to step 86).

82)  COIL Circuit Check

Leave ignition off. Measure resistance between each ignition coil pack wiring harness connector COIL terminal and corresponding jack of intermittent ignition analyzer. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair open in COIL circuit.

83)  Coil Check

Leave ignition off. Reconnect ignition coil packs. Turn ignition on. Press intermittent ignition analyzer reset button. If all COIL LEDs are off, go to next step. If any COIL LEDs are on, go to step 88).

84)  Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

85)  Turn ignition off. Disconnect coil packs. Turn ignition on. Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace ICM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

86)  Circuit Check

Turn ignition off. Disconnect ICM. Measure resistance between COIL jack and IGN GND jack of intermittent ignition analyzer. Measure resistance between COIL jack and VBAT jack. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, repair open in COIL circuit.

87)  Leave ignition off. Measure resistance between each COIL jack and all other COIL jacks of intermittent ignition analyzer. If each resistance measurement is 10,000 ohms or more, replace ICM. If any resistance is less than 10,000 ohms, repair open in coil circuit.

88)  System Visual Check - Leave ignition off. Check ignition system for damage, loose connections or corrosion. Repair if necessary. If ignition system looks okay, replace ignition coil pack(s).

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 88) to step 95). No test procedures have been omitted.

95)  IDM TACH Fault

If IDM TACH LEDs was off when fault was recreated, go to next step. If IDM TACH LEDs was on when fault was recreated, replace ICM.

96)  Circuit Check

Turn ignition off. Disconnect ICM from intermittent ignition analyzer. Measure resistance between IDM jack and VPWR jack of intermittent ignition analyzer. Measure resistance between IDM jack and PWR GND jack. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, go to step 102).

97)  ICM Check

Turn ignition off. Reconnect ICM. Turn ignition on. Press intermittent ignition analyzer RESET button. If ICM OK LED is blinking, go to next step. If ICM OK is not blinking, replace ICM.

98)  Wiggle Check

Turn ignition off. Disconnect ICM from intermittent ignition analyzer. Set MODE switch to "B".

99)  Turn ignition off. Disconnect PCM 104-pin connector. Turn ignition on. Press intermittent ignition analyzer RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

100)  If any IDM codes were present in QUICK TEST, go to next step. If IDM codes were not present in QUICK TEST, replace ICM.

101)  Circuit Check

Leave ignition off and PCM disconnected. Measure resistance between IDM jack and VPWR jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, repair IDM circuit short in wiring harness.

102)  Leave ignition off and PCM disconnected. Measure resistance between IDM jack and PWR GND jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, replace PCM. If resistance is less than 10,000 ohms, repair IDM circuit short in wiring harness.

103)  Turn ignition off. Install EEC-V Breakout Box (014-00950). Measure resistance between IDM jack of intermittent ignition analyzer test pins No. 4 at the breakout box. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open circuit between ICM and PCM.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 103) to step 120). No test procedures have been omitted.

120)  Check CKP BIAS

Turn ignition off. Disconnect CKP sensor wiring harness connector. Turn ignition on. If CKP BIAS LEDs is of, go to next step. If CKP BIAS is on, go to step 122).

121)  Circuit Check

Turn ignition off. Disconnect ICM from intermittent ignition analyzer. Measure resistance between CKP+ jack and VPWR jack of intermittent ignition analyzer. Measure resistance between CKP+ jack and PWR GND jack. If resistance is 10,000 ohms or more, replace ICM. If resistance is less than 10,000 ohms, repair CKP+ circuit short in wiring harness.

122)  Circuit Check

Turn ignition off. Measure resistance between CKP- jack and VPWR jack of intermittent ignition analyzer. Measure resistance between CKP- jack and PWR GND jack. If resistance is 10,000 ohms or more, replace CKP sensor. If resistance is less than 10,000 ohms, go to next step.

123)  Turn ignition off. Disconnect ICM from intermittent ignition analyzer. Measure resistance between CKP- jack and PWR GND jack. Measure resistance between CKP- jack and VPWR jack of intermittent ignition analyzer. If each resistance measurement is 10,000 ohms or more, replace ICM. If either resistance measurement is less than 10,000 ohms, repair CKP- circuit short in wiring harness.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 123) to step 130). No test procedures have been omitted.

130)  CKP Signal Check

Crank or start engine. If CKP SIGNAL LED is on, go to next step. If CKP SIGNAL is off, go to step 132).

131)  Wiggle Check

Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

132)  Circuit Check

Turn ignition off. Disconnect CKP sensor. Measure resistance between CKP+ terminal of CKP sensor wiring harness connector and CKP+ jack of intermittent ignition analyzer. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair CKP+ open circuit in wiring harness.

133)  Leave ignition off. Measure resistance between CKP- terminal of CKP sensor wiring harness connector and CKP- jack of intermittent ignition analyzer. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair CKP- open circuit in wiring harness.

134)  Leave ignition off. Measure resistance between CKP+ jack and CKP- jack of intermittent ignition analyzer. If resistance is less than 10,000 ohms, go to next step. If resistance is 10,000 ohms or more, go to step 136).

135)  Sensor Check

Turn ignition off. Inspect CKP sensor and data wheel for damage, correct alignment and air gap. Service sensor and data wheel as necessary. If no problems are found, replace CKP sensor.

136)  Leave ignition off. Disconnect ICM from analyzer. Measure resistance between CKP+ jack and CKP- jack of intermittent ignition analyzer. If resistance is less than 10,000 ohms, CKP+ and CKP- are shorted together. Repair as necessary. If resistance is 10,000 ohms or more, replace ICM.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 136) to step 150). No test procedures have been omitted.

150)  Capture Fault

Crank or start engine. If PIP LED is blinking, go to next step. If PIP is not blinking, go to step 157).

151)  Turn ignition off. Disconnect ICM from analyzer. Measure resistance between PIP jack and PWR GND jack of intermittent ignition analyzer. Measure resistance between PIP jack and VPWR jack. If each resistance is 10,000 ohms or more, go to next step. If either resistance is less than 10,000 ohms, go to step 158).

152)  Turn ignition on. Measure voltage between PIP jack and PWR GND jack of intermittent ignition analyzer. If voltage is 8.0 volts or less, go to next step. If voltage is more than 8.0 volts, repair PIP circuit short to VPWR.

153)  Turn ignition off. Reconnect ICM to analyzer. Turn ignition on. Measure voltage between PIP jack and PWR GND jack of intermittent ignition analyzer. If voltage is 10.5 volts or more, go to next step. If voltage is less than 10.5 volts, replace ICM.

154)  Wiggle Check

Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

155)  Turn ignition off. Disconnect ICM from analyzer. Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to ON. Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

156)  Leave ignition off. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace ICM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

157)  Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace ICM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

158)  Turn ignition off. Disconnect PCM 104-pin connector. Measure resistance between PIP jack and PWR GND jack of intermittent ignition analyzer. Measure resistance between PIP jack and VPWR jack. If each resistance is 10,000 ohms or more, replace PCM. If either resistance is less than 10,000 ohms, repair short in PIP circuit.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 158) to step 170). No test procedures have been omitted.

170)  If engine starts, go to next step. If engine does not start, go to step 178).

171)  Start engine. If BASE TIMING LED is off, go to next step. If BASE TIMING LED is on and all fault memory LEDs are off, replace ICM.

172)  If SPOUT LED is blinking, go to next step. If SPOUT is on, go to step 180).

173)  Check Circuit

Turn ignition off. Disconnect PCM 104-pin connector. Measure resistance between SPOUT jack and PWR GND jack of intermittent ignition analyzer. Measure resistance between SPOUT jack and VPWR jack. If each resistance is 10,000 ohms or more, go to next step. If either resistance is less than 10,000 ohms, go to step 183).

174)  Turn ignition off. Disconnect ICM from analyzer. Disconnect PCM 104-pin connector. Measure resistance between SPOUT jack and PWR GND jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, replace PCM.

175)  Leave ignition off. Measure resistance between SPOUT jack and VPWR jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, replace PCM.

176)  Wiggle Check

Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

177)  Leave ignition and intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "A". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

178)  Turn ignition off. Disconnect PCM 104-pin connector. Install EEC-V Breakout Box (014-00950). Measure resistance between PIP jack of intermittent ignition analyzer test pins No. 56 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in PIP circuit.

179)  Measure resistance between IGN GND jack of intermittent ignition analyzer test pins No. 16 at the breakout box. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in IGN GND circuit.

180)  Turn ignition off. Disconnect PCM 104-pin connector. Install EEC-V Breakout Box (014-00950). Measure resistance between SPOUT jack of intermittent ignition analyzer test pins No. 36 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in SPOUT circuit between ICM and PCM.

181)  Wiggle Check

Turn ignition off. Reconnect PCM. Disconnect ICM from analyzer. Turn ignition on. Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

182)  Leave ignition and intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "A". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace PCM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.

183)  Circuit Check

Leave ignition off and ICM disconnected. Measure resistance between SPOUT jack and PWR GND jack of intermittent ignition analyzer. Measure resistance between SPOUT jack and VPWR jack. If each resistance is 10,000 ohms or more, replace ICM. If either resistance is less than 10,000 ohms, repair SPOUT circuit short in harness.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 183) to step 190). No test procedures have been omitted.

190)  Check For VPWR

Turn ignition on. Measure voltage between VPWR jack of intermittent ignition analyzer and negative battery terminal. If voltage is 6 volts or more, go to next step. If voltage is less than 6 volts, repair open in VPWR circuit to ICM.

191)  Check PWR GND Circuit

Turn ignition off. Measure resistance between PWR GND jack of intermittent ignition analyzer and negative battery terminal. If resistance is less than 5 ohms, go to next step. If voltage is 5 ohms or more, repair open in PWR GND circuit to ICM.

192)  Wiggle Check

Connect jumper wire between PWR GND jack of intermittent ignition analyzer and negative battery terminal. Shake and bend wiring harness and connectors. If the intermittent ignition analyzer performs reset, repair open in VPWR circuit to ICM. If the intermittent ignition analyzer does not perform reset, repair open in PWR GND circuit to ICM.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 192) to step 200). No test procedures have been omitted.

200)  Check IGN GND

Turn ignition on. Measure voltage between IGN GND jack and PWR GND of intermittent ignition analyzer and negative battery terminal. If voltage is -.5 to .5 volt, go to next step. If voltage is not -.5 to .5 volt, go to step 202).

201)  Wiggle Check

Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If any fault memory LEDs are on, press RESET button and continue to test until intermittent fault is located.

202)  Check Circuit

Turn ignition off. Disconnect PCM 104-pin wiring harness connector. Measure resistance between IGN GND jack and VPWR jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, replace ICM. If resistance is less than 10,000 ohms, repair short in IGN GND circuit.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 202) to step 210). No test procedures have been omitted.

210)  Check Circuit

Turn ignition off. Measure resistance between CKP SHD jack and VPWR jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, go to step 212).

211)  Wiggle Check

Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace ICM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent fault is located.

212)  Check Circuit

Turn ignition off. Disconnect ICM from tester. Measure resistance between CKP SHD jack and VPWR jack of intermittent ignition analyzer. If resistance is 10,000 ohms or more, replace ICM. If resistance is less than 10,000 ohms, repair short in CKP SHD circuit.

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