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B0770 Cadillac Code - All Wheel Drive Indicator Circuit

- Code Popularity: 756 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B0770 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Transfer Case Select Switch
  • Transfer Case Select Switch harness is open or shorted
  • Transfer Case Select Switch circuit poor electrical connection
  • Faulty Transfer Case Shift Control Module (TCCM)
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How to Fix the DTC B0770 Cadillac?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0770 Cadillac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B0770 Cadillac Description

The All Wheel Drive (AWD/4WD Auto) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, a LED, and a LED control circuit. The indicator dimming control circuit is the LED feed circuit and continuously supplies B+ to the 2WD HI, 4WD Auto, 4WD HI, and 4WD LO LEDs. When the AWD mode has been selected by the driver, the transfer case shift control module (TCCM) provides a ground through the AWD indicator control circuit illuminating the LED.
The TCCM tests the AWD indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the AWD indicator control circuit for 2 seconds during the Bulb Test at key ON.

OBDII Code B0770 Cadillac - All Wheel Drive Indicator Circuit - AutoCodes.com
B0770 Cadillac Code - All Wheel Drive Indicator Circuit

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Code B0770 Cadillac comments

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