P1575

DTC P1575 (12): MPI Module Voltage Problem
1. Check that the battery module switch is ON.
Is the switch ON?
YES - Go to step 2.
NO - Turn the battery module switch ON.
2. Reset the MCM.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II).
Is DTC P1629 or P1446 indicated?
YES - Do the troubleshooting for DTC P1629 or P1446.
NO - Go to step 5.
5. Check for DTCs.
Is DTC P1575 indicated?
YES - Go to step 7.
NO - Go to step 6.
6. Start the engine, and hold it at 4,000 rpm for 10 seconds.
Is DTC P1575 indicated?
YES - Replace the battery module.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the high voltage contactor, battery module, and MCM.
7. Turn the ignition switch OFF.
8. Turn the battery module switch OFF.
9. Remove the IPU lid.
10. Check the connection at the MCM connector F (14P).
Is the connection OK?
YES - Go to step 11.
NO - Repair as necessary.
11. Turn the battery module switch ON.





12. Measure voltage between MCM connector terminals F10 and F14.
Is there more than 120 V?
YES - Go to step 13.
NO - Replace the battery module.
13. Disconnect the junction board 4P connector.
14. Turn the ignition switch ON (II).





15. Measure voltage between junction board 4P connector terminals No. 3 and No. 4.
Is there about 12 V?
YES - Replace the battery module.
NO - Go to step 16.





16. Check for continuity between junction board 4P connector terminal No. 3 and body ground.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between the high voltage contactor and G551.
17. Turn the ignition switch ON (II).





18. Measure voltage between MCM connector terminal A6 and body ground.
Is there battery voltage?
YES - Repair open in the wire between the high voltage contactor and the MCM (A6).
NO - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck. If the symptom/indication goes away with a known-good MCM, replace the original MCM.