DTC Troubleshooting: P1078 (106)
DTC P1078:
 IMT Valve Stuck in Low RPM Position
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Do the IMT TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IMT actuator and the ECM/PCM.■
NO -
Go to Step 4 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the IMT actuator 5P connector.
  1. Turn the ignition switch to ON (II).
  1. Check the IMT VALVE SW in the DATA LIST with the HDS.
Is CLOSE indicated?
YES -
Go to Step 12 .
NO -
Go to Step 8 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector B (44P).
  1. Check for continuity between ECM/PCM connector terminal B39 and body ground.
Is there continuity?
YES -
Repair short in the wire between the ECM/PCM (B39) and the IMT actuator, then go to Step 21 .
NO -
Go to Step 28 .