Reading Diagnostic Trouble Codes

Fig. 25 Data Link Connector Pin Terminals:

Displaying Diagnostic Trouble Codes
1. Install jumper wire between DLC terminal 13 and ground, Fig. 25. The DLC is located under the lefthand side of the instrument panel, right of the steering column.
2. Turn ignition switch to On position.
3. Wait three seconds, then observe transfer case switch status lamps.

Reading Diagnostic Trouble Codes
The transfer case status lamps will flash to indicate the DTC's stored in memory. If only one DTC is stored in memory, that DTC flashes repeatedly with a three second delay between flash sequences. If more than one DTC is stored in memory, the first DTC flashes once, then the next code is flashed. This sequence continues to flash until the jumper wire is disconnected.
1. Confirm customer complaint and perform visual inspection.