P1888

DTC P1888: Problem in CVT Speed Sensor Circuit

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1. Turn the ignition switch OFF.
2. Disconnect CVT speed sensor connector.
3. Turn the ignition switch ON (II).





4. Measure the voltage between CVT speed sensor connector terminal No. 1 and body ground.
Is there about 5 V?
YES-Go to step
NO-Go to step 11.
5. Turn the ignition switch OFF.





6. Check for continuity between CVT speed sensor connector terminal No. 2 and body ground.
Is there continuity?
YES-Repair short to ground in the wire between TCM connector terminal B15 and the CVT speed sensor.
NO-Go to step 7.





7. Check for continuity between CVT speed sensor connector terminal No. 3 and body ground.
Is there continuity?
YES-Go to step 8.
NO-Repair loose terminal or open in the wire between TCM connector terminal B16 and the CVT speed sensor.
8. Turn the ignition switch ON (II).





9. Measure the voltage between CVT speed sensor connector terminals No. 2 and No. 3.
Is there about 5 V?
YES-Go to step 15.
NO-Go to step 10.





10. Measure the voltage between TCM connector terminals B15 and B16.
Is there about 5 V?
YES-Repair open in the wire between TCM connector terminal B15 and the CVT speed sensor.
NO-Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM and recheck.





11. Measure the voltage between TCM connector terminals B3 and B16.
Is there 4.75 - 5.25 V?
YES-Repair open in the wire between TCM connector terminal B3 and the CVT speed sensor.
NO-Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect TCM connector B (22P).





14. Check for continuity between TCM connector terminal B3 and body ground.
Is there continuity?
YES-Repair short to ground in the wire between TCM connector terminal B3 and the CVT speed sensor.
NO-Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM and recheck.
15. Connect CVT speed sensor connector.





16. Measure the voltage between TCM connector terminals B15 and B16.
Is there about 0 V or 5 V ?
YES-Go to step 17.
NO-Replace the CVT speed sensor.
17. Set the parking brake, and block both rear wheels securely.
18. Raise the front of the vehicle, and make sure it is securely supported.
19. Start the engine, then shift to the D position and drive the vehicle at engine idling.





20. Measure the voltage between TCM connector terminals B15 and B16.
Is there 1.5 - 3.5 V?
YES-Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM and recheck.
NO-Replace the CVT speed sensor.