P1561
DTC P1561 (3): Motor Commutation Sensor B Circuit Low Input1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Start the engine.
Is DTC P1561 indicated?
YES-Go to step 4.
NO-Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at motor commutation sensor B and the MCM.
4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Start the engine, and let it idle.
8. Measure voltage between MCM connector terminals B4 and B12.
Is there about 2 - 4 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. Turn the ignition switch OFF.
10. Turn the ignition switch ON (II).
11. Measure voltage between MCM connector terminals B4 and B22.
Is there more than 4 V?
YES-Go to step 12.
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
12. Turn the ignition switch OFF.
13. Disconnect MCM connector B (24P).
14. Disconnect the motor commutation sensor 10P connector.
15. Check for continuity between body ground and MCM connector terminal B12.
Is there continuity?
YES-Repair short in the wire between the motor commutation sensor and the MCM (B12).
NO-Go to step 16.
16. M/T:
Remove the transmission, and the clutch.
CVT:
Remove the transmission.
17. Inspect the drive sensor plate for bending, and the motor commutation sensor mounting.
Is the drive sensor plate OK, and is the sensor properly mounted?
YES-Replace the motor commutation sensor.
NO-
^ Replace the drive sensor plate.
^ Repair the motor commutation sensor connections.