P1607

DTC P1607: Malfunction in ECM/PCM Internal Circuit
1. Do the ECM/PCM Reset Procedure.
2. Turn the ignition switch ON (II).
3. Wait 30 seconds.
Is DTC P1607 indicated?
YES-Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original ECM/PCM.
Diagnostic Strategies

NO-Go to step 4.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II).
6. Wait 10 seconds.
Is DTC P1607 indicated?
YES-Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original ECM/PCM.
Diagnostic Strategies

NO-Intermittent failure, system is OK at this time.