Motor Current V Phase Signal Circuit Low Input
DTC 26 (P0A61, P1583): Motor Current V Phase Signal Circuit Low Input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 26 indicated?
YES-Go to step 3.
NO-Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the V 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 B7 and B22.
Is there more than 0.2 V?
YES-Substitute a known-good MCM, and recheck. If symptom/indication goes away, replace the original MCM.
NO-Go to step 8.
8. Measure voltage between MCM connector terminals B22 and C26.
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. Turn the ignition switch ON (II).
11. Measure voltage between power converter wire harness 24P connector terminals No. 9 and No. 12.
Is there about 5 V?
YES-Go to step 12.
NO-Repair open in the wire between the MCM (C26) and the power converter wire harness 24P connector.
12. Turn the ignition switch OFF.
13. Check for continuity between body ground and the power converter wire harness 24P connector terminal No. 17.
Is there continuity?
YES-Go to step 18.
NO-Go to step 14.
14. Disconnect the power converter wire harness 24P connector.
15. Check for continuity between MCM connector terminal B7 and power converter wire harness 24P connector terminal No. 17.
Is there continuity?
YES-Go to step 16.
NO-Repair open in the wire between the MCM (B7) and the power converter wire harness 24P connector.
16. Remove the PCU. Check for continuity between V phase motor current sensor 3P connector terminal No. 1 and power converter wire harness 24P connector terminal No. 9.
Is there continuity?
YES-Go to step 17.
NO-Repair open in wire between the V phase motor current sensor and the power converter wire harness 24P connector.
17. Check for continuity between V phase motor current sensor 3P connector terminal No. 3 and power converter wire harness 24P connector terminal No. 17.
Is there continuity?
YES-Replace the V phase motor current sensor.
NO-Repair open in the wire between the V phase motor current sensor and the power converter wire harness 24P connector.
18. Disconnect MCM connector B (25P).
19. Check for continuity between body ground and power converter wire harness 24P connector terminal No.17.
Is there continuity?
YES-Go to step 20.
NO-Substitute a known-good MCM, and recheck. If the symptom/indication goes away, replace the original MCM.
20. Disconnect the power converter wire harness 24P connector.
21. Check for continuity between body ground and the power converter wire harness 24P connector terminal No. 17.
Is there continuity?
YES-Repair short in the wire between the MCM (B7) and the power converter wire harness 24P connector.
NO-Go to step 22.
22. Remove the PCU. Disconnect the V phase motor current sensor 3P connector.
23. Check for continuity between body ground and power converter wire harness 24P connector terminal No. 17.
Is there continuity?
YES-Repair short in the wire between the V phase motor current sensor and the power wire harness 24P connector.
NO-Replace the V phase motor current sensor.