DTC Troubleshooting: P1077 (106)
  1. Check for continuity between IMT actuator 5P connector terminal No. 5 and ECM connector terminal B38.
Is there continuity?
YES -
Go to Step 25 .
NO -
Repair open in the wire between the ECM (B38) and the IMT actuator, then go to Step 31 .
  1. Remove the IMT actuator.
  1. Move the IMT valve by hand.
Does it move smoothly?
YES -
Go to Step 27 .
NO -
Replace the IMT valve, then go to Step 31 .
  1. Substitute a known-good IMT actuator.
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Do the IMT TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES -
Replace the original IMT actuator, then go to Step 31 .
NO -
Go to Step 38 .
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the ECM idle learn procedure.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1077 indicated?
YES -
Check for poor connections or loose terminals at the IMT actuator and the ECM, then go to Step 1 .
NO -
Go to Step 36 .
  1. Monitor the OBD STATUS for DTC P1077 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in Step 34 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the IMT actuator and the ECM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 34 .
  1. Reconnect all connectors.
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Start the engine.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1077 indicated?
YES -
Check for poor connections or loose terminals at the IMT actuator and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 39 . If the ECM was substituted, go to Step 1 .
NO -
Go to Step 41 .
  1. Monitor the OBD STATUS for DTC P1077 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs were indicated in Step 40 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the IMT actuator and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 39 . If the ECM was substituted, go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.