DTC 07

DTC 7: Mode Signal Circuit 2 Problem
1. Reset the MCM.
2. Test-drive the car. Accelerate for three seconds, and decelerate for three seconds.
Is DTC 7 indicated?
YES- Go to step 3.
NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECM and at the MCM.
3. Turn the ignition switch OFF.
4. Turn the battery module switch OFF.
5. Remove the IPU lid.





6. Check for continuity between body ground and MCM connector terminal A3.
Is there continuity?
YES- Go to step 7.
NO- Go to step 11.
7. Disconnect ECM connector D (16P).





8. Check for continuity between body ground and MCM connector terminals A3.
Is there continuity?
YES- Go to step 9.
NO- Substitute a known-good ECM, turn the battery module switch ON, and recheck. If the symptom/indication goes away, replace the original ECM.
9. Disconnect MCM connector A (32P).





10. Check for continuity between body ground and MCM connector terminals A3.
Is there continuity?
YES- Repair short in the wire between the MCM (A3) and the ECM (D15).
NO- Substitute a known-good MCM, turn the battery module switch ON, and recheck. If the symptom/indication goes away, replace the original MCM.
11. Disconnect ECM connector D (16P).
12. Turn the ignition switch ON (II).





13. Measure voltage between ECM connector terminal D15 and B20.
Is there about 5 V?
YES- Substitute a known-good ECM, turn the battery module switch ON, and recheck. If the symptom/indication goes away, replace the original ECM.
NO- Go to step l4.





14. Check for voltage between body ground and MCM connector terminals A3 and A24.
Is there about 5 V?
YES- Substitute a known-good MCM and recheck. If the symptom/indication goes away, replace the original MCM.
NO- Repair open in the wire between the MCM (A3) and the ECM (D15).