C1296

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Circuit Description
Current is supplied to the Four Wheel Drive (4WD) indicator lamp through the IG COIL METER fuse (hot with ignition switch in ON and START positions.) The 4WD switch is open when the transfer case is set in either 2H or N range.
In 2H mode, Circuit (CKT) 2S02 is supplied with current flowing through the 4WD indicator lamp bulb filament. The Electronic Brake Control Module (EBCM) senses this current and determines the vehicle is in 2H mode.
In 4H/4L mode, CKT 2S02 is grounded by the 4WD switch. This causes to turn on the 4WD indicator lamp and signals the EBCM that the vehicle is in 4WD.

Conditions for Setting the Diagnostic Trouble Code (DTC)
- This DTC can be set anytime after initialization is completed.
- A malfunction exists if the EBCM detects an open in CKT 2S02.

Action Taken When the DTC Sets
- A malfunction DTC stores.
- The ABS remains functional.

Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.
- 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition off.

Diagnostic Aids
The following conditions may cause an intermittent malfunction:
- A poor connection
- Rubbed-through wire insulation
- A broken wire inside the insulation Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction.
Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal-to-wiring connections
- Physical damage to the wiring harness
- Open in CKT 2S02, 1A01 and/or CKT 8B01
- Open 4WD indicator lamp bulb filament
- Open IG COIL METER fuse.