1996 Mazda B-Series

TESTS W/CODES - 1996
1. 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 harness connector terminal No. 1 (VPWR). See Figure. Connect negative lead to terminal No. 5 (TCC). 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.
2. 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 models, measure and record resistance between test pins No. 37 and 57 and transmission harness connector terminal No. 1 (VPWR). Measure and record resistance between breakout box test pin No. 53 and transmission harness connector terminal No. 5 (TCC). See Figure. On all other models, measure and record resistance between test pins No. 71 and 97 and transmission harness connector terminal No. 1 (VPWR). Measure and record resistance between breakout box test pin No. 54 and transmission harness connector terminal No. 5 (TCC). 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.
3. 4) Check Solenoid/Harness For Shorts To Power & Ground On 1995 Explorer models, measure and record resistance between test pin No. 53 and 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 pin No. 54 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 next step.
4. 5) Solenoid Functional Test Connect transmission tester. Perform TCC 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).
5. 6) Transmission Drive Test Perform tester drive test. See tester instructions. While in 3rd, gear press tester TCC switch. If LED turns Green and engine RPM decreases, replace PCM. Erase all trouble codes. See CLEARING CODES. Perform TRANSMISSION DRIVE CYCLE TEST and TORQUE CONVERTOR ENGAGEMENT TEST. Repeat QUICK TEST. If codes are still present, go to TROUBLE SHOOTING in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article. If engine RPM does not decrease when operated by tester, go to next step.
6. 7) Check Resistance Of Solenoid/Harness Set tester Bench/Drive switch to BENCH mode. Set Gear Selector switch to OHMS CHECK. Connect ohmmeter negative lead to TCC jack and positive lead to VPWR jack on tester. Measure resistance. Resistance should be 8.9-16 ohms. If resistance is within specification, go to next step. If resistance is not within specification, go to step 9).
7. 8) Check Solenoid/Harness For Short To Ground Check continuity between BAT (-) tester terminal and TCC connector terminals. If continuity exists, go to next step. Erase all trouble codes and road test vehicle. Repeat QUICK TEST. If continuity does not exist, see TROUBLE SHOOTING in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article for non-electronic symptom diagnostics.
8. 9) 4R44E & 4R55E 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 TCC internal harness connector. Ensure connector is 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 all connectors are okay, go to next step.
9. 10) Check Internal Harness Continuity Disconnect internal harness from TCC solenoid. Connect positive lead of ohmmeter to tester TCC jack and negative lead to TCC connector Purple wire. Measure and record resistance. Connect positive lead of ohmmeter to tester VPWR jack and negative lead to TCC connector Black wire. If each resistance is .5 ohms or less, go to next step. If any resistance is more than .5 ohms, replace internal harness. Go to step 12).
10. 11) Check Internal Harness For Shorts To Ground Using transmission tester, check continuity between each TCC solenoid connector terminal and BAT (-) terminal of tester. If continuity does not exist in either circuit, go to next step. If continuity exists in any circuit, replace internal harness. Go to next step.
11. 12) Check Solenoid Resistance Using ohmmeter, check resistance between TCC solenoid terminals. If resistance is 8.9-16 ohms, go to next step. If resistance measured is not within specification, replace TCC solenoid. Install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST.
12. 13) Check Solenoid For Short To Ground Using ohmmeter, check continuity between each TCC solenoid terminal and ground. If continuity exists, replace faulty TCC solenoid. Install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST. If continuity does not exist, install all components in reverse order of disassembly. Fill transmission with fluid. Erase all trouble codes. See CLEARING CODES. Repeat QUICK TEST. See TROUBLE SHOOTING in AUTO TRANS OVERHAUL - FORD 4R44E & 4R55E article for non-electronic symptom diagnostics.