P1739

DTC P1739: Problem in 3rd Clutch Pressure Switch Circuit

NOTE: Record all freeze data before you troubleshoot.

1. Turn the ignition switch ON (II).





2. Measure the voltage between PCM connector terminals B24 and B20 or B22.
Is there battery voltage?
YES-Go to step 7.
NO-Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the B (25P) connector from the PCM.
5. Disconnect the 3rd clutch pressure switch connector.





6. Check for continuity between PCM connector terminal B24 and body ground.
Is there continuity?
YES-Repair short to ground in the wire between PCM connector terminal B24 and the 3rd clutch pressure switch.
NO-Disconnect the 3rd clutch pressure switch connector, and go to step 15.
7. Raise the front of the vehicle, and make sure it is securely supported.
8. Set the park brake, and block rear wheels securely.
9. Start the engine, cancel the TCS, then shift to the 1 position and drive in 3rd gear for more than 5 seconds.





10. Measure the voltage between PCM connector terminals B24 and B20 or B22.
Is there about 0 V?
YES-Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck.
NO-Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect the 3rd clutch pressure switch connector.
13. Turn the ignition switch ON (II).





14. Measure the voltage between the 3rd clutch pressure switch connector terminal and body ground.
Is there battery voltage?
YES-Go to step 15.
NO-Repair open in the wire between the 3rd clutch pressure switch and the PCM.





15. Measure the resistance between the 3rd clutch pressure switch connector terminal and body ground.
Is the resistance 10 M Ohms or more?
YES-Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck.
NO-Replace the 3rd clutch pressure switch.