Motor Current W Phase Signal Circuit High Input
DTC 29 (P0A65, P1584): Motor Current W Phase Signal Circuit High input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 29 indicated?
YES-Go to step 3.
NO-Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the W phase motor current sensor and at the MCM.
3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.
6. Turn the ignition switch ON (II).
7. Measure voltage between MCM connector terminals B6 and B21.
Is there less than 4.8 V?
YES-Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
NO-Go to step 8.
8. Measure voltage between MCM connector terminals B21 and C25.
Is there about 5 V?
YES-Go to step 9.
NO-Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
9. Turn the ignition switch OFF.
10. Disconnect the power converter wire harness 24P connector.
11. Turn the ignition switch ON (II).
12. Measure voltage between power converter wire harness 24P connector terminals No. 8 and No. 11.
Is there about 5 V?
YES-Go to step 13.
NO-Repair open in the wire between the MCM (B21) and the power connector wire harness 24P connector.
13. Turn the ignition switch OFF.
14. Remove the PCU. Check for continuity between W phase motor current sensor 3P connector terminal No. 2 and power converter wire harness 24P connector terminal No. 11.
Is there continuity?
YES-Replace the W phase motor current sensor.
NO-Repair open in wire between the W phase motor current sensor and the power converter wire harness 24P connector.