U1301

Read the instructions below then start the fault diagnostic procedure.

Symptom: The LED on the control button unit shows a red light.

U1301

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 Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.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.