SAAB WIS ONLINE

T8 / P0641 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Limp home

  P0641 00


5V Supply Group 1, Short to Ground/B+

Fault symptom

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

Limp home

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

When the 5-volt output to the following components short circuits to ground or B+:
Pressure sensor, A/C
Fuel Pressure Sensor
Pedal Position Sensor 2
Throttle Position Sensor 1
Boost Pressure Sensor

Dependent:


None

System reaction to a fault:

Limp home

OK report:

Fault criterion not fulfilled and vehicle speed over 0 km/h for more than 60 s.

Fault handling:

Type III
(See section 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:

Read values for the above components.
(See also description of readings/activations in diagnostic tool)