DTC No. | Detecting Condition | Possible Cause | Related engine |
P1679 | ICM message error | Request from ICM is invalid (Protocol layer violation- Invalid request, check sum error etc.) | δ2.7 |
PROBLEM VERIFICATION
Connect the hi-scan (pro) to data link connector.
Turn the ignition switch to ON and verify the DTC "P1679" is displayed.
Erase the DTC "P1679" with the hi-scan (pro) and then monitor again.
Is the same code displayed ?
▶ Problem is intermittent and ICM memory was not cleared.
▶ Check harness and connector between ICM and ECM
CHECK HARNESS AND CONNECTOR BETWEEN ICM AND ECM
Check for continuity between ICM harness side connector(M23-1) terminal 6 and ECM harness sideconnector (C30-1) terminal 3.
Is there continuity ?
▶ Repair an open in the wire between the ICM and the ECM.
▶ If all the tests are OK, replace the ICM or ECM and recheck.
