DTC 27
DTC 27: Motor Current V Phase Signal Circuit High Input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 27 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 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 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. Disconnect the power converter wire harness 24P connector.
11. Turn the ignition switch ON (II).
12. Measure voltage between the power converter wire harness 24P connector terminals No. 9 and No. 12.
Is there about 5 V?
YES- Replace the V phase motor current sensor.
NO- Repair open in the wire between the MCM (B22) and the power converter wire harness 24P connector.