DTC 24
DTC 24: Motor Current U Phase Signal Circuit Low Input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 24 indicated?
YES- Go to step 3.
NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the U phase motor module 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 B8 and B23.
Is there more than 0.2 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 B23 and C29.
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. Measure voltage between the power converter wire harness 24P connector terminals No. 10 and No. 13.
Is there about 5 V?
YES- Go to step 10.
NO- Repair open in the wire between the MCM (C29) and power converter wire harness 24P connector.
10. Turn the ignition switch OFF.
11. Check for continuity between body ground and the power converter wire harness 24P connector terminal No.18.
Is there continuity?
YES- Go to step 13.
NO- Go to step 12.
12. Check for continuity between the U phase motor current sensor 3P connector terminal No.1 and the power converter wire harness 24P connector terminal No.10.
Is there continuity?
YES- Replace the U phase motor current sensor.
NO- Repair open in wire between the U phase motor current sensor and the power converter wire harness 24P connector.
13. Disconnect MCM connector B (25P).
14. Check for continuity between body ground and the power converter wire harness 24P connector terminal No.18.
Is there continuity?
YES- Go to step 15.
NO- Substitute a known-good MCM and recheck. If the symptom/indication goes away, replace the original MCM.
15. Disconnect the power converter wire harness 24P connector.
16. Check for continuity between body ground and the power converter wire harness 24P connector terminal No.18.
Is there continuity?
YES- Repair short in wire between the MCM (B8) and the power converter wire harness 24P connector.
NO- Go to step 17.
17. Disconnect the U phase motor current sensor 3P connector.
18. Check for continuity between body ground and the power converter wire harness 24P connector terminal No. 18.
Is there continuity?
YES- Repair short in wire between the U phase motor current sensor and the power converter wire harness 24P connector.
NO- Replace the U phase motor current sensor.