DTC U0198-00: Communication Error With MAZDA Emergency Assistance Control Module [Audio Control Unit (ACU)]: Outline
DTC U0198:00 (AUDIO CONTROL UNIT (ACU)) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Communication error with Mazda EMERGENCY ASSISTANCE control module |
| Detection condition |
- The audio control unit (ACU) detects a communication interruption or a communication error with Mazda EMERGENCY ASSISTANCE control module for approx. 30 s.
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| Fail-safe |
Not applicable |
| Possible cause |
- Mazda EMERGENCY ASSISTANCE control module connector or terminal malfunction
- Short to ground or open circuit in Mazda EMERGENCY ASSISTANCE control module power supply circuit
- Open circuit in Mazda EMERGENCY ASSISTANCE control module ground circuit
- Audio control unit (ACU) connector or terminal malfunction
- Short to power supply, short to ground or open circuit in the circuits between the following audio control unit (ACU) and Mazda EMERGENCY ASSISTANCE control module
- Power supply circuit
- Signal circuit
- Ground circuit
- Malfunction in shield wire of circuits between audio control unit (ACU) and Mazda EMERGENCY ASSISTANCE control module
- Mazda EMERGENCY ASSISTANCE control module malfunction
- Audio control unit (ACU) malfunction
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Courtesy of MAZDA MOTORS CORP.
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