Radio Inoperative DTC U1000 - keywords amp amplifier communication data inop power
| Subject: | Radio Inoperative DTC U1000 |
| Models: | 2000-2005 Cadillac DeVille |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
When diagnosing a 2000-2005 Cadillac DeVille with an inoperative Radio and a DTC U1000 stored in the Radio, it is important to note that a loss of Class 2 communication between the Radio and Amplifier can cause this condition. If there is a loss of communication between the Radio and Amplifier, the Radio may appear to power up for approximately 3 seconds and then turn off.
Recommendation/Instructions:
As with all loss of communication concerns, inspect the power, ground, and serial data circuits to the suspect module prior to replacing any parts.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
