The diagnostic trouble codes (DTCs) may be displayed by using either of the following diagnostic tools:

Perform the following steps in order to display the DTCs using the Scan Tool:

1. Select Diagnostics, Year, Vehicle, Module and Engine.
2. Select DTC .
3. Select one of the following:

•	DTC Information

•	Freeze Frame/ Failure Records

Perform the following steps in order to display the DTCs using the on-board diagnostic method:

1. Press one of the following combinations:

•	For digital IPC, press OFF and WARMER.

•	For analog IPC, press OFF and PASSENGER WARMER.

2. Press the LO (fan speed) button until ACM? appears.
3. Press the HI (fan speed) button until ACM CODES? appears.
4. Press the HI (fan speed) button until ACM DTC appears.