SAAB WIS ONLINE

PSG16 / P0643 07

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Performance loss. Cruise control not working.

  P0643 07


Voltage Supply Group 1. Short to B+.

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

Performance loss.

Cruise control not working.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

Voltage is higher than 5,4 V for more than 0,2 s.

System reaction to a fault:

Limp Home, engine torque limitation.
Cruise control switched off.

OK report:

Fault criteria NOT fulfilled for 0.2 s.

Checking the wiring harness

Faults in the control module female connector can be the cause of the DTC. Check the connector with respect to oxidation, depressed pins and pin clamping force.
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:


Functions in the diagnostic tool related to the fault:

Test value:
Intake pressure sensor
Intake air temperature sensor
(See also description of readings/activations in diagnostic tool)