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Diagnostic Aids

WARNING: This page is about a different car, the 1996 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. This test is used to diagnose the following:

Fig 1: Transmission Range (TR) Sensor Schematic
G96F01059
Fig 2: TR Test Circuit & Connector Terminals (AX4N)
G96H01060
Fig 3: TR Test Circuit & Connector Terminals (AX4S & E4OD)
G96J01061
Fig 4: TR Test Circuit & Connector Terminals (CD4E)
G96B01062
Fig 5: PNP & TR Test Circuit & Connector Terminals (F4E)
G96D01063
Fig 6: TR Test Circuit & Connector Terminals (4R70W, 4R44E & 4R55E)
G96F01064
TR SENSOR SPECIFICATIONS

Position Volts Ohms
Park 3.97-4.85 3770-4607
Reverse 3.24-3.96 1304-1593
Neutral 2.55-3.11 660-807
Overdrive 1.88-2.30 361-442
Drive 1.23-1.51 190-232
First 0.61-0.75 78-95
  1. Step 1) DTC P0705, P0707, P0708, P0736, P1701 & P1705  Probable causes for these codes are as follows:
    • Misadjusted linkage.
    • Misaligned TR sensor.
    • TR sensor open or shorted circuit.

    Turn ignition off. Ensure parking brake is applied. Place shift lever in Neutral. Place TR Sensor Gauge (T92P-7010-AH) in TR sensor adjustment slot and go to next step. If gauge does not fit in slot, loosen TR sensor mounting screws and move sensor until gauge fits in slot. Tighten screws and verify shift linkage is properly adjusted. Repeat QUICK TEST .

  2. Step 2) Remove sensor adjustment gauge. Connect scan tester to DLC. Turn ignition on. Using scan tester, access TR PID and TR-V PID. PID reading should be stable. Place gear shift lever in Park position. Tap on TR sensor while monitoring PID voltage for fault. Fault will be indicated by change in PID voltage. Shake and bend sections of wiring harness between TR sensor and PCM. If no faults are indicated, go to next step. If faults are indicated, go to step 4).
  3. Step 3) Check TR Sensor Voltage  Turn ignition on. Using scan tester, access TR PID and TR-V PID. Voltage reading should be 4-5 volts in Park position. Cycle shift lever through complete gear range. Voltage should be within specification. See TR SENSOR SPECIFICATIONS  table. If each voltage measurement is within specification, fault is internal transmission damage. If any voltage measurement is not within specification, go to next step.
  4. Step 4) Check Continuity Of TR Circuits  Turn ignition off. Disconnect scan tester. Disconnect TR sensor wiring harness connector. Disconnect PCM 104-pin connector. Inspect terminals for damage and repair if necessary. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between test pin No. 64 (TR) at breakout box and TR terminal of TR sensor wiring harness connector. Measure resistance between test pin No. 91 (SIG RTN) at breakout box and SIG RTN terminal of TR sensor wiring harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit and repeat QUICK TEST .
  5. Step 5) Leave ignition off and TR sensor disconnected. Measure resistance between test pin No. 64 (TR) and test pins No. 71, 76, 77, 91 and 97 at breakout box. Measure resistance between test pin No. 64 and chassis ground. If all resistance measurements are 10,000 ohms or more, go to next step. If any resistance measurement is less than 10,000 ohms, repair short circuit and repeat QUICK TEST .
  6. Step 6) Check TR Sensor Resistance  Leave ignition off. Reconnect TR sensor. Unlock steering column. Measure resistance between breakout box test pins No. 64 and 91 in each gear range. Resistance should be within specification. See TR SENSOR SPECIFICATIONS  table. If each resistance measurement is within specification, fault is internal transmission damage. If any resistance measurement is not within specification, replace TR sensor and repeat QUICK TEST .
  7. Step 7) DTC P0705, P0707, P0708, P1705 & P1709  Probable causes for these codes are as follows:
    • Shift lever not in Park.
    • Misadjusted linkage.
    • Misaligned TR switch.
    • Damaged PCM.

    Turn ignition off. Ensure parking brake is applied. Place shift lever in Neutral. Place TR Sensor Gauge (T93P-70010-A) in TR sensor adjustment slots and go to next step. If gauge does not fit in slot, loosen TR sensor mounting screws and move sensor until gauge fits in slot. Tighten screws and verify shift linkage is properly adjusted. Repeat QUICK TEST .

  8. Step 8) Remove sensor adjustment gauge. Connect scan tester to DLC. Turn ignition on. Using scan tester, access PNP PID, TR PID and TR-S PID. PID reading should be stable. Place gear shift lever in Park position. Tap on TR sensor while monitoring PID voltage for fault. Fault will be indicated by change in PID voltage. Shake and bend sections of wiring harness between TR sensor and PCM. If no faults are indicated, go to next step. If faults are indicated, go to step 12).
  9. Step 9) Check PNP Circuit Voltage  Turn ignition off. Disconnect PNP terminal at starter relay. Turn ignition on. Measure voltage at PNP terminal while cycling shift lever through complete gear range. With shift lever in Park or Neutral, voltage should be 0.5 volts less. With shift lever in any position except Park or Neutral, voltage should be 4.5 volts more. If each voltage measurement is within specification, fault is TR switch. If any voltage measurement is not within specification, go to next step.
  10. Step 10) Check Continuity Of TR Circuits  Turn ignition off. Disconnect scan tester. Disconnect TR sensor wiring harness connector. Disconnect PCM 104-pin connector. Inspect terminals for damage and repair if necessary. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Turn ignition on. Measure voltage at test pin No. 71 and 97 at breakout box. Measure voltage at corresponding test pin while cycling shift lever through gear range as follows:
    • Reverse and test pin No. 32.
    • Overdrive and test pin No. 6.
    • Drive and test pin No. 9.
    • 1st gear and test pin No. 7.

    If each voltage measurement is 10.5 volts or more, fault is TR switch. If any voltage measurement is less than 10.5 volts, go to next step.

  11. Step 11) Turn ignition off. Leave PNP disconnected. Inspect connector and repair if damaged. Measure resistance between test pin No. 64 (TR) at breakout box and PNP terminal at connector. See Fig 5. If resistance is 5 ohms or less, go to step 13). If resistance more than 5 ohms, repair open circuit, repeat QUICK TEST .
  12. Step 12) Check Continuity Of TR Circuits  Turn ignition off. Disconnect TR sensor wiring harness connector. Measure resistance at breakout box test pin while cycling shift lever through gear range as follows:
    • Reverse and test pin No. 32.
    • Overdrive and test pin No. 6.
    • Drive and test pin No. 9.
    • 1st gear and test pin No. 7.

    If each resistance measurement is 5 ohms or more, go to next step. If any resistance measurement is less than 5 ohms, repair open circuit and repeat QUICK TEST .

  13. Step 13) Check TR Circuit For Short To Power Or Ground  Leave ignition off PNP and TR sensor disconnected. Ensure scan tester is disconnected. Measure resistance between test pin No. 64 and test pins No. 71 and 91 at breakout box. Measure resistance between test pins No. 71 and 91 and the following test pins; No. 6, 7, 9 and 32. If each resistance measurement is 10,000 ohms or more, replace PCM and repeat QUICK TEST . If any resistance measurement is less than 10,000 ohms, repair short circuit and repeat QUICK TEST .
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