1. Check for continuity between ACC unit 20P connector terminals No. 9, No. 11, No. 12 and body ground individually.

Is there continuity?

YES | - | Substitute a known-good ACC unit, then go to Step 15 , and recheck. If any DTC does not indicated, replace the original ACC unit, then go to Step 15 .
NO | - | Repair open in the wire between the ACC unit and G501, then go to Step 15 .

1. Reconnect the ACC unit 20P connector.

1. Turn the ignition switch 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.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC U0104 is indicated, check for poor connections or loose terminals at the gauge assembly, the ACC unit and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■