DTC 10
DTC 10: Motor Driver Module (MCM) Voltage Signal Circuit Low Input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 10 indicated ?
YES- Go to step 3.
NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the voltage converter module 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 D14 and B19.
Is there about 5 V?
YES- Go to step 8.
NO- Substitute a known-good MCM and recheck. If the symptom/indication goes away, replace the original MCM.
8. Measure voltage between the power converter wire harness 24P connector terminals No. 15 and No. 21.
Is there about 5 V?
YES- Go to step 9.
NO- Repair open in the wire between the MCM (D14) and the voltage converter module.
9. Measure voltage between MCM connector terminals B16 and B19.
Is there about 0.5 V?
YES- Substitute a known-good MCM and recheck.
If the symptom/indication goes away, replace the original MCM.
NO- Go to step 10.
10. Measure voltage between power converter wire harness 24P connector terminals No. 15 and No. 20.
Is there about 0.5 V?
YES- Repair open in wire between the MCM (B16) and power converter wire harness 24P connector.
NO- Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect the power converter wire harness 24P connector.
13. Check for continuity between MCM connector terminals B16 and body ground.
Is there continuity?
YES- Go to step 14.
NO- Go to step 16.
14. Disconnect MCM connector B (25P).
15. Check for continuity between MCM connector terminals B16 and body ground.
Is there continuity?
YES- Repair short in the wire between the MCM (B16) and the voltage converter modules
NO- Substitute a known-good MCM and recheck. If the symptom/indication goes away, replace the original MCM.
16. Remove the PDU.
17. Check for continuity between the voltage converter module 16P connector terminal No. 9 and the power converter wire harness 24P connector terminal No. 20.
Is there continuity?
YES- Go to step 18.
NO- Repair open in the wire between the voltage converter module and the power converter wire harness 24P connector.
18. Check for continuity between the voltage converter module 16P connector terminal No. 9 and the metal PDU case.
Is there continuity?
YES- Go to step 19.
NO- Replace the voltage converter module.
19. Disconnect the voltage converter module 16P connector.
20. Check for continuity between the voltage converter module 16P connector terminal No. 9 and the metal PDU case.
Is there continuity?
YES- Repair short in the wire between the voltage converter module and the power converter wire harness 24P connector.
NO- Replace the voltage converter module.