P0626

P0626 00

Generator F terminal Circuit, Short to B+







Fault symptom
Higher idling speed.

On-board diagnosis

Type of diagnosis:
Continuous

Enable criteria:
Engine running.
Engine speed under 3000 rpm.
Generator active.

Fault criteria:
Period length exceeds 6.5% for more than 3 s.
Generator connection for field current (DF). Originates in the internal regulator and shows the amount of period length for which the generator applies field current. Used to calculate generator torque requirement.

Dependent
P0337, P0339
P0621, P2500, P2501

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

OK report:
Fault criteria NOT fulfilled for 4 s.

Fault handling:
Type III without Check Engine.
(See Description of On-Board Diagnostics/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 F Terminal
- Alternator L Terminal

Activation:
- Alternator L Terminal Load Dump