U1301

U1301

Data Link Cabel Shorted to Battery











Fault symptoms
- The LED on the control button unit shows a red light.

On-Board Diagnosis

Type of diagnosis:
- Continuous

Enabling criteria:
- Ignition ON.

Fault criteria:
- When the communication lead is short circuited to B+ for more than 15 s.

Checking the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.

Diagnostic help
No diagnostic communication is possible whilst the fault is active. The historical fault codes are erased after 50 fault free driving cycles.

Fault Diagnosis Procedure (2007;2008;2009;2010)