P1589

DTC P1589 (21): MPI Module Current Signal Circuit Problem
1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).
Is DTC P1589 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MPI module current sensor and at the MCM.
4. Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck.
Is DTC P1589 indicated?
YES - Replace these items:
^ MPI module current sensor.
^ MPI module.
NO - Replace the original MCM.

DTC P1590 (24): Motor Current U Phase Signal Circuit Low Input
1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).
Is DTC P 1590 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the motor current U phase sensor and at the MCM.
4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Turn the ignition switch ON (II).





8. Measure voltage between MCM connector terminals C6 and C12.
Is the voltage more than 0.2 V?
YES - 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.
NO - Go to step 9.





9. Measure voltage between MCM connector terminals C12 and C17.
Is there about 5 V?
YES - Go to step 10.
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.
10. Turn the ignition switch OFF.
11. Remove the PDU cover.
12. Disconnect the motor current U phase sensor 3P connector.
13. Turn the ignition switch ON (II).





14. Measure voltage between motor current U phase sensor 3P connector terminals No. 1 and No. 2.
Is there about 5 V?
YES - Go to step 15.
NO - Repair open in the wire between the motor current U phase sensor and the MCM (C17).
15. Turn the ignition switch OFF.
16. Disconnect MCM connector C (17P).





17. Check for continuity between motor current U phase sensor 3P connector terminal No. 3 and body ground.
Is there continuity?
YES - Repair short in the wire between the motor current U phase sensor and the MCM (C6).
NO - Go to step 18.





18. Check for continuity between MCM connector terminal C6 and motor current U phase sensor 3P connector terminal No. 3.
Is there continuity?
YES - Replace the motor current U phase sensor. If sensor replacement does not fix the problem, 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.
NO - Repair open in the wire between the motor current U phase sensor and the MCM (C6).