Inspection Procedure

1. Connect the hi-scan (pro) to data link connector.
2. Turn the ignition switch to ON and verify the DTC "P1679" is displayed.
3. Erase the DTC "P1679" with the hi-scan (pro) and then monitor again.
4. Is the same code displayed?

   NO 

   • Problem is intermittent and ICM memory was not cleared.

   YES 

   • Check harness and connector between ICM and ECM

Check for continuity between ICM harness side connector (M23-1) terminal 6 and ECM harness side connector (C30-1) terminal 3.

1. Is there continuity?

   NO 

   • Repair an open in the wire between the ICM and the ECM.

   YES 

   • If all the tests are OK, replace the ICM or ECM and recheck.