What happens when service 4 wheel drive trouble codes are stored?

When the trouble codes are stored and the Service 4 Wheel Drive Message is displayed, the transfer case is inoperative for the rest of that particular key cycle. It will test again and reset the message on the next key cycle if the problem hasn’t been fixed. The codes may be stored with or without you requesting a transfer case shift.

What causes a service 4WD message to be displayed?

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code (s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed. Ready to sell? CarMax buys all kinds of cars

Is the service 4WD light coming on again?

After a few months of ownership, I started having the ‘service 4wd’ light blink on for a few seconds at random times. The dealer flashed the TSB concerning the problem and it went away. A few weeks ago the light started coming on again, concurrently with the ‘traction control off’ light.

Do you need to replace transmission case control module TCCM?

DO NOT replace the Transmission case control module TCCM. After reprogramming with the most current update, perform a Clutch Reset Procedure (Motor Learn Procedure). Also, if you have C0387, C0387 or C0569 stored, check the transfer case electrical connectors and wiring. The transfer case encoder motor is a bi-directional DC motor.

What is the diagnostic code for transfer case?

Diagnostic Trouble Code C0306 is set once the Transfer Case Control Module detects an open, short-to-ground, or low voltage in the Motor Control A or B circuit, or an open or short-to-ground fault inside of the transfer case motor.

What is the transfer case for SPD 4WD?

BW44012 SPD 4WD TC4401 4 BW44702 SPD 4WD TC4470 6 BW4472•BW13721 SPD 4WD TC1372 8 BW44731 SPD 4WD TC4473 10 BW44761 SPD 4WD TC4476 11 BW44791 SPD 4WD TC4479 12 BW44811 SPD 4WD TC4481 13 BW44822 SPD 4WD TC4482 14 BW44842 SPD 4WD TC4484 16 NP1261 SPD AWD TC126 18 NP136AWD1 SPD AWD TC136 20 NV149•NVG149-NP31 SPD 4WD TC149 22 NP203C2 SPD 4WD TC203C 24

What is the error code for a trans 72?

TRANS 72 Transmission Oil Temperature is above 122 deg. C TRANS 73 Software is out of the calibration mode and the park brake request is still active. TRANS 74 The park brake ON with gear is engaged – no park brake request from calibration. TRANS 75 Engine speed from Inst Controller does not match the speed signal from the alternator.

What does DTCs stand for in GM transfer case?

DTCs will stay in memory for 100 key cycles. The dash buttons to the right of the air vent identify this system as an NVG 246 automatic two-speed, which means it has DTCs and scan tool capabilities. mode control is a set of normally open switches that vary the voltage supplied by the transfer case module when closed.

When to reset service 4 wheel drive message?

2007–2009 Chevrolet Avalanche, Silverado, Silverado Hybrid, Suburban, Tahoe, Tahoe Hybrid When the trouble codes are stored and the Service 4 Wheel Drive Message is displayed, the transfer case is inoperative for the rest of that particular key cycle. It will test again and reset the message on the next key cycle if the problem hasn’t been fixed.

What is the GM 4 wheel drive Bulletin?

GM has issued a service bulletin # 09-04-21-001 to address a Service 4 Wheel Drive Message condition on the vehicles listed below. In addition to the Service 4 Wheel Drive Message, you may also have a C0387 or a C0569 trouble code stored. 2007–2009 Chevrolet Avalanche, Silverado, Silverado Hybrid, Suburban, Tahoe, Tahoe Hybrid

What to do if your car has 4 wheel drive?

Deviations in current and position from expected values will cause this DTC to set if the ignition is ON and the system battery voltage is between 10.5–18 V. 1. The key must be in the OFF position for at least 30 seconds. 2. Engage parking brake. 3. Place transmission in Neutral. 4. Turn the key to the ACCESSORY position 5.