Driver/Vehicle Information Display

B1736

Rheostat Circuit. Open Circuit






Fault symptoms
The lighting controlled by the rheostat is on full continuously. The rheostat does not work.

Conditions
Resistance greater than 20 kohm generates a diagnostic trouble code.

Diagnostic help
The rheostat and rheostat level can be read using the diagnostics tool. The rheostat should be between 0 V and 3.5 V and the rheostat position should correspond to this.

The rheostat level sent on the bus should be 25-100 % when the headlamps are ON.

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.