One Display Inoperative
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X1 harness connector at the appropriate display.
- Ignition ON, test for less than 5 Ω between the ground circuit terminal 5 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
- Ignition ON, test for B+ between the ignition voltage circuit terminal 6 and ground.
- If less than the specified value, B+ circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
- Ignition OFF, reconnect the X1 harness connector, and disconnect the X2 harness connector at the display.
- Ignition ON, test for 4.5-5.5 V between the terminals listed below and ground:
- I2C Clock Signal - terminal 5
- I2C Data - terminal 6
- If less than specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the DVD control module.
- If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DVD control module.
- If all circuits test normal, replace the appropriate display.