B3812 04

B3812 04

UAM Signal, Open Circuit







Fault symptom
- Message "SERVICE ANTI-THEFT ALARM" shown on SID.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Diagnosis runs when car alarmed or when ignition on.

Fault criteria:
- No signal from ultrasound sensor.

Checking the wiring harness
- Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:
- Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:
- Activate
- Ultrasonic Sensor
(See also description of readings/activations in diagnostic tool)