SAAB WIS ONLINE

B2371

Read the instructions below then start the fault diagnostic procedure.

Symptom: Steering wheel switch faulty.

B2371


Switch Unit, steering wheel. Open Circuit




Fault symptoms

Steering wheel switch faulty.

Conditions

Open circuit: Resistance in the circuit higher than 8 kohm.

Diagnostic help

The steering wheel controls can be read using Tech 2.

The buttons (7 resistors connected in series) are supplied with +5 V from the SID unit. When a button is pressed, the resistor concerned is grounded and this produces the relevant voltage.

Check wiring harness.

Jiggle the wiring harness at several points and in different directions to reveal intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic instrument during the test.

Warning

Read Group 8:6 Airbag (SRS), Technical Description, “Safety and handling instructions” before commencing work.