DTC 42
DTC P1566 (42): Motor Commutation Sensor Signal Problem1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).
Is DTC P1566 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the motor commutation sensor and at the MCM.
4. Turn the ignition switch OFF.
5. Disconnect the motor commutation sensor 10P connector.
6. Turn the ignition switch ON (II).
7. In the engine compartment, measure voltage between motor commutation sensor 10P connector terminals No. 5 and No. 9, No. 4 and No. 8, and No. 7 and No. 10.
Is there about 5 V?
YES - Replace the motor commutation sensors.
NO - Go to step 8.
8. Measure voltage between body ground and the motor commutation sensor 10P connector terminals No. 5, No. 4, No. 7.
Is there about 5 V?
YES - Repair open in the wire between the motor commutation sensor and the MCM (B4, B5, B11).
NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Turn the battery module switch OFF.
11. Remove the IPU lid.
12. Turn the ignition switch ON (II).
13. Measure voltage between MCM connector terminals B5 and B14, B4 and B22, B11 and B21.
Is there about 5 V?
YES - Repair open in the wire between the motor commutation sensor and the MCM (B14, B21, B22).
NO - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck. If the symptom/indication goes away with a known-good MCM, replace the original MCM.