DTC Troubleshooting: P1077 (106)
  1. Check for continuity between IMT actuator 5P connector terminal No. 5 and ECM/PCM connector terminal B38.
Is there continuity?
YES -
Go to Step 25 .
NO -
Repair open in the wire between the ECM/PCM (B38) and the IMT actuator, then go to Step 30 .
  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 30 .
  1. Substitute a known-good IMT actuator.
  1. Turn the ignition switch to 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 30 .
NO -
Go to Step 36 .
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Do the ECM/PCM 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/PCM, then go to Step 1 .
NO -
Go to Step 35 .
  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/PCM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 34 .
  1. Reconnect all connectors.
  1. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
  1. Start the engine, and let it idle.
  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/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 38 . If the ECM/PCM was substituted, go to Step 1 .
NO -
Go to Step 40 .
  1. Monitor the OBD STATUS for DTC P1077 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. If any other Temporary DTCs or DTCs were indicated in Step 39 , 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/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 38 . If the ECM/PCM was substituted, go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.