P0647

P0647 00

A/C Relay, Short Circuit To B+







Fault symptom
A/C not working, no cooling.

On-board diagnosis

Type of diagnosis:
Continuous

Enable criteria:
Battery voltage must be between 11 - 16 V.
Ignition ON or Engine running.
A/C requested.
Output is active.

Fault criteria:
When voltage on the output exceeds 2.0 V for more than 1 s.

Dependent
None

System reaction to a fault:
Output to the A/C relay is switched off.

OK report:
Fault criteria NOT fulfilled for 2 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:
Activation:
- AC Relay