Without RPO Code UZ6 (No Amplifier)

B1030

CIRCUIT DESCRIPTION




When the radio is set at minimum volume, the plus (+) and minus ( ) speaker outputs are approximately 5-6 volts measured to vehicle ground. As the volume increases, the plus and minus change to create a voltage difference between each other. This drives the voice coil of the speaker producing sound.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC B1025 LF Audio Output ( ) Circuit
- DTC B1035 RF Audio Output ( ) Circuit
- DTC B1045 LR Audio Output ( ) Circuit
- DTC B1055 RR Audio Output ( ) Circuit




This vehicle has DTCs which include DTC Symptoms.

For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

CONDITIONS FOR RUNNING THE DTC

B1025 - B1055 01, 02, and 04

The following are conditions that must be present in order for the radio to enable the diagnostics.
- The vehicle power mode is ACCESSORY, RUN, or RAP.
- The system voltage is at least 9 volts and no more than 16 volts.
- All the above conditions are present for greater than 250 milliseconds.

CONDITIONS FOR SETTING THE DTC
The following conditions are present for 250 milliseconds or longer:

B1030 01
One of the speaker negative output circuits is shorted to battery.

B1030 02
The speaker negative output circuit is shorted to ground.

B1030 04
The speaker negative output circuit is open.

ACTION TAKEN WHEN THE DTC SETS
The radio disables the audio output to the speaker with the current fault.

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

Steps 1-6:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the DTC is still present.
3. This step isolates the fault condition.