DTC 19
DTC 19: Motor Power Inverter (MPI) Module Current Signal Circuit Low Input1. Reset the MCM.
2. Turn the ignition switch ON (II).
Is DTC 19 indicated?
YES- Go to step 3.
NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MPI module 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 B18 and B25.
Is there more than 0.2 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 B25 and C24.
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. Measure voltage between the junction board 16P connector terminals No. 3 and No. 11.
Is there about 5 V?
YES- Go to step 10.
NO- Repair open in the wire between the MCM (C24) and the junction board. V
10. Measure voltage between junction board 16P connector terminals No. 9 and No. 11.
Is there about 2.5 V?
YES- Repair open in the wire between the MCM and the junction board.
NO- Go to step 11.
11. Disconnect MCM connector B (25P).
12. Check for continuity between the junction board 16P connector terminal No. 9 and body ground.
Is there continuity?
YES- Go to step 13.
NO- Substitute a known-good MCM and recheck. If the symptom/indication goes away, replace the original MCM.
13. Disconnect the junction board 16P connector.
14. Check for continuity between body ground and the junction board 16P connector terminal No. 9.
Is there continuity?
YES- Repair short in wire between the MCM (B18) and the junction board 16P connector.
NO- Replace the battery module.