SAAB WIS ONLINE

P0654

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE lamp on. No A/C function.

P0654


Voltage Supply Group 3. Short to Ground.

Fault symptoms


• CHECK ENGINE lamp on.

• No A/C function.


On-Board Diagnostics

Type of diagnosis:


- Continuous.


Enable criteria:


- Turn Ignition On.


Fault criteria:


- Control module output shorted to B+/open circuit.


System reaction to a fault:


- A/C function deactivated.


Check the wiring

A fault in the control module's female connector can generate a DTC. Check the contact for oxidation, dislodge pins and pin clamping force.

Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this. Check switches, connectors and crimp connections for oxidation, dislodged pins and pin clamping force.

Diagnostic help

Diagnosis of:


• Diagnosis checks the power supply to:

• Particle filter pressure sensor, exhaust system

• Pressure sensor, A/C


For more information, see also:

- "Read Values" menu for a description of read values.

- "Activate" menu for a description of applications.