B1440 00

B1440 00

+B Circuit from ISM, Open







Fault symptom
- Error message is shown on the display.

On-board diagnosis

Enable criteria:
- Ignition ON.

Fault criteria:
- Control module receives a faulty signal from ISM (ignition switch).
- Signal from the key does not match key position.

System reaction to a fault:
- Steering column lock deactivated.

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:

Test value:
- Ignition Key Position +B, Wire from ISM
- Ignition Switch +B, K-Line from ISM
(See also description of readings/activations in diagnostic tool)