P1785

DTC P1785: MAP Sensor Circuit High Voltage
2005 Model

NOTE:
^ Record all freeze data and review General Troubleshooting Information before you troubleshoot.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1. Turn the ignition switch ON (II).
2. Check the MAP SENSOR in the DATA LIST with the HDS.
Is about 101 kPa (760 mmHg, 30 inch Hg), or 2.9 V indicated?
YES- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor, the TCM, and at the ECM.
NO- Go to step 3.
3. Check the DTCs with HDS.
Is DTC P0108 indicated?
YES- Do the DTC Troubleshooting for the MAP sensor circuit high voltage. Recheck for DTC P1785 after troubleshooting.
NO- Go to step 4.





4. Connect MAP sensor 3P connector terminal No. 3 to body ground with a jumper wire.





5. Check for continuity between TCM connector terminal B2 and body ground.
Is there continuity?
YES- Substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.
NO- Repair open in the wire between TCM (B2), and the MAP sensor.