1996 Mazda B-Series
- TESTS W/CODES
- 1996
- 2) Check Electrical Signal Operation
Disconnect transmission harness connector. Inspect condition of connector and repair as needed. Using DVOM (20-volt scale), connect positive lead to transmission vehicle harness connector terminal No. 10 (VPWR). See Fig 1. Connect negative lead to appropriate solenoid circuit. Depress and release throttle to cycle solenoid output. If voltage changes at least .5 volts, go to step 5). If voltage is unaffected, go to next step.WIRE COLOR IDENTIFICATION
Terminal No. Wire Color Circuit 1 Red TCC Power 2 Green/White TSS Signal (+) 3 Gray/Red TSS Signal Return (-) 4 Orange/Black TFT Sensor Signal (+) 5 Pink/Yellow TCC Solenoid 7 Pink/Black Shift Solenoid No. 3 8 Green/Red TFT Sensor Signal Return (-) 9 Brown/Orange Coast Clutch Solenoid 10 Red Shift Solenoid Power 11 Red EPC Solenoid Power 12 White/Yellow EPC Solenoid 14 Pink/Orange Shift Solenoid No. 2 16 Orange/Yellow Shift Solenoid No. 1 - 3) Check Continuity Of Solenoid Signal & VPWR Harness Circuits Ensure ignition is off. Disconnect PCM connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. On 1995 Explorer, measure and record resistance between breakout box test pin No. 51, 52 or 55 and corresponding solenoid signal pin at transmission harness connector. Measure and record resistance between test pins No. 37 and 57 and transmission harness connector terminal No. 10 (VPWR). On all other models, measure and record resistance between breakout box test pins No. 1, 27 or 53 and corresponding solenoid signal pin at transmission harness connector. See Fig 1. Measure and record resistance between test pins No. 71 and 97 and transmission harness connector terminal No. 10 (VPWR). If any resistance is greater than 5 ohms, repair open circuit. Connect all components. Disconnect breakout box and repeat QUICK TEST. If each resistance is 5 ohms or less, go to next step.
- 4) Check Solenoid Harness For Shorts To Power & Ground On 1995 Explorer, measure and record resistance between breakout box test pins No. 51, 52, and 55 test pins No. 37 and 57. Measure and record resistance between test pins No. 40, 46 and 60, and ground. On all other models, measure and record resistance between breakout box test pins No. 1, 27, and 53 and test pins No. 71 and 97. Measure and record resistance between test pins No. 77, 91 and 103, and ground. If any resistance is less than 10 k/ohms, repair short circuit. Connect all components. Disconnect breakout box and repeat QUICK TEST. If each resistance is 10 k/ohms or more, go to step 6).
- 5) Solenoid Functional Test Connect transmission tester. Perform solenoid functional test. See tester instructions. If LED turns Green when solenoid activates and turns off when solenoid deactivates, go to next step. If LED turns Red or remains off when solenoid activates, go to step 7).
- 6) Transmission Drive Test Perform tester drive test. See tester instructions. If vehicle upshifts when operated with tester, replace PCM. Erase all trouble codes. See CLEARING CODES. Perform TRANSMISSION DRIVE CYCLE TEST. Repeat QUICK TEST. If codes are still present, go to TROUBLE SHOOTING in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article. If vehicle does not upshift when operated by tester, go to next step.
- 7) Check Resistance Of Solenoid Set tester Bench/Drive switch to Bench mode. Set Gear Selector switch to OHMS CHECK. Connect ohmmeter positive lead to VPWR jack on tester and negative lead in turn to SS1, SS2, and SS3 jacks. Measure and record resistance. Resistance for each solenoid should be 22-48 ohms. If resistance is within specification, go to next step. If resistance is not within specification, go to step 9).
- 8) Check Solenoid For Short To Ground Check continuity between BAT (-) terminal and between SS1, SS2, and SS3 jacks. Check continuity between BAT (-) terminal and VPWR terminal. If continuity exists for any circuit, go to next step. Erase all codes. See CLEARING CODES. Repeat QUICK TEST. If continuity does not exist, go to TROUBLE SHOOTING in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article.
- 9) Internal Electronic Diagnostics Drain transmission fluid. See TRANSMISSION SERVICING section. Remove transmission fluid pan. See VALVE BODY under ON-VEHICLE SERVICE in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article. Inspect all internal wiring and harness connectors. Ensure all connectors are fully connected and not damaged. Repair as needed. Install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST. If wiring and connectors are okay, go to next step.
- 10) Check Internal Harness Continuity
Disconnect internal harness from solenoid assemblies. Connect positive lead of ohmmeter in turn to tester SS1, SS2, and SS3 jack and negative lead to corresponding shift solenoid signal wire. Measure and record resistance. To test SS1, SS2, and SS3 VPWR circuits, connect positive lead of ohmmeter to selected solenoid White wire. Connect negative lead to corresponding VPWR tester terminal. Measure and record resistance. If each resistance is .5 ohms or less, go to next step. If any resistance measured is more than .5 ohms, replace internal harness. Go to step 12).SHIFT SOLENOID WIRE COLOR IDENTIFICATION
Application Signal Power SS1 Gray White SS2 Brown White SS3 Yellow White - 11) Check Internal Harness For Shorts To Ground Using transmission tester, check continuity between each solenoid lead and BAT (-) terminal of tester. If continuity does not exist in any circuit, go to next step. If continuity exists in any circuit, replace internal harness. Go to next step.
- 12) Check Resistance Of Solenoid Using ohmmeter, check resistance between terminals of each solenoid. Resistance should be 22-48 ohms. If resistance is within specification, go to next step. If resistance measured for any solenoid is not within specification, replace shift solenoid. Install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST.
- 13) Check Solenoid For Short To Ground Using ohmmeter, check continuity between each solenoid terminal and ground. If continuity exists, replace faulty shift solenoid. If continuity does not exist, go to TROUBLE SHOOTING in FORD 4R44E & 4R55E article. Install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST.
- 2) Check Electrical Signal Operation
Disconnect transmission harness connector. Inspect condition of connector and repair as needed. Using DVOM (20-volt scale), connect positive lead to transmission vehicle harness connector terminal No. 10 (VPWR). See Fig 1. Connect negative lead to appropriate solenoid circuit. Depress and release throttle to cycle solenoid output. If voltage changes at least .5 volts, go to step 5). If voltage is unaffected, go to next step.