SAAB WIS ONLINE

P0646

Read the instructions below then start the fault diagnostic procedure.

Symptom: Continuous function of A/C.

P0646


A/C Relay Circuit. Short to Ground.


Fault symptoms


• Continuous function of A/C.


Conditions

The following conditions apply for this DTC:


• The signal from the control module output is less than 0.4 V for more than 0.6 seconds. Diagnosis is carried out when output is inactive.


Diagnostic help

A request from ACC/MPC must have been received before diagnosis is performed.

Activation of A/C relay output.

Note

A fault in the control module female connector can cause a trouble code. Check the contact for a bent pin, oxidation and tightness of pins. See Difficult faults in PSG16 despite trouble code