P0607

DTC P0607: ECM Internal Circuit Malfunction (2004-2005 models)

NOTE:
- Information marked with an asterisk (*) applies to 2004-2005 models.
- Information marked with double asterisk (**) applies to 2000-2003 models.
- If the No. 25 BACK UP (7.5 A) fuse is removed and the ignition switch is ON (II), MIL will report on and ECM will store the DTC P0607* (P1607)**.
- Before you troubleshoot, record all freeze data and review the general troubleshooting information.

1. Reset the ECM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).

Is DTC P0607* (P1607)** indicated?

YES - Substitute a known-good ECM and recheck. If the symptom/indication goes away, replace the original ECM.

NO - Go to step 4.

4. Cycle the ignition switch OFF and ON (II) five times.
5. Check for a DTC or a Temporary DTC with a scan tool or the HDS.

Is DTC P0607* (P1607)** indicated?

YES - Inspect the No. 25 BACK UP (7.5 A) fuse. If the fuse is OK, repair open in VBU wire between the under-dash fuse/relay box and the ECM.

NO - Intermittent failure, system is OK at this time. A low battery can cause this problem. Ask the customer if the engine had to be jump-started recently.