Radio, Stereo and Compact Disc System Diagnosis

DTC B1001

CIRCUIT DESCRIPTION
The radio receives GMLAN messages, containing VIN digits 3 and 4, when the ignition cycles from OFF to ON and the radio is active. The specific VIN data is sent from another module on the GMLAN serial data circuit. The VIN data needs to match the calibration platform ID stored in the radio memory in order for the radio to operate normally.

DTC DESCRIPTOR




This diagnostic procedure supports the following DTC:
B1001 Option Configuration Error

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description. DTC Symptom Description

CONDITIONS FOR RUNNING THE DTC
The following conditions must be present in order for the radio to enable the diagnostics:
- The radio transitions from OFF to ON. This maybe in response to the radio power switch or an ignition key cycle.
- The system voltage is at least 9.0 volts and no more than 16.0 volts.

CONDITIONS FOR SETTING THE DTC
The radio detects the calibration platform ID does not match the VIN data sent to the radio with GMLAN messages.

ACTION TAKEN WHEN THE DTC SETS
The radio does not function properly. The radio displays "CALIBRATE".

CONDITIONS FOR CLEARING THE DTC
- The conditions for setting the DTC are no longer present.
- A history DTC clears after 100 malfunction-free ignition cycles.
- The radio receives the clear code command from the scan tool.

TEST DESCRIPTION

Step 1 - Step 4:

The numbers below refer to the step numbers on the diagnostic table.
2. Clear all DTCs and cycle the ignition to verify that the DTC did not falsely set.
3. Clear all DTCs after the repair procedure is complete.