P0621

P0621 00

Generator L Terminal Circuit, Open







Fault symptom
- Charging lamp on with engine running.
- Higher idling speed.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Ignition ON.

Fault criteria:
- Open circuit on the lead between control module pin B16 and generator pin 1 (D+) for more than 0.5 s.

Dependent:
P0337, P0339

System reaction to a fault:
- Control module continues working with the higher idling function.

OK report:
- No faults for 7 seconds with the ignition on and 60 seconds of idling.

Fault handling:
- Type III without Check Engine.
(See section Fault handling III, "Other emission-related components and functions" for more information.)

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:
- Alternator L Terminal
- Alternator F Terminal

Activation:
- Alternator L Terminal Load Dump
(See also description of readings/activations in diagnostic tool)