P1562
DTC P1562 (4): Motor Commutation Sensor B Circuit High Input1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Start the engine.
Is DTC P1562 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 B and at the MCM.
4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Turn the ignition switch ON (II).
8. Use a wrench to slowly rotate the crankshaft as you measure voltage between MCM connector terminals B4 and B12.
Does the measured voltage alternate between about 5 V and 0.6 V?
YES - 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.
NO - Go to step 9.
9. Measure voltage between MCM connector terminals B4 and B22.
Is there about 5 V?
YES - Go to step 10.
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.
10. Turn the ignition switch OFF.
11. Disconnect the motor commutation sensor 10P connector.
12. Turn the ignition switch ON (II).
13. Measure voltage between motor commutation sensor 10P connector terminals No. 4 and No. 8.
Is there about 5 V?
YES - Go to step 15.
NO - Go to step 14.
14. Measure voltage between motor commutation sensor 10P connector terminal No. 4 and body ground.
Is there about 5 V?
YES - Repair open in the wire between the motor commutation sensor and the MCM (B4).
NO - Repair open in the wire between the motor commutation sensor and the MCM (B22).
15. Turn the ignition switch OFF.
16. Connect motor commutation sensor 10P connector terminal No. 1 to body ground with a jumper wire.
17. Disconnect the MCM connector B (24P).
18. Check for continuity between MCM connector terminal B12 and body ground.
Is there continuity?
YES - Replace the motor commutation sensor.
NO - Repair open in the wire between the motor commutation sensor and the MCM (B12).