B1736
B1736
Rheostat Circuit. Open Circuit.
Fault symptoms
The illumination controlled by the rheostat is at full brightness constantly. Rheostat malfunction.
Type of diagnosis
Continuous
Preconditions
Ignition ON
Fault criteria
When the resistance of the rheostat circuit is greater than 20 kohm.
Diagnostic help
The rheostat and rheostat value can be read using the diagnostic tool. The working range of the rheostat is 0-3.5 V.
The rheostat value sent on the bus should be 25-100% when the headlights are ON.
Checking the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.
Fault diagnosis procedure is not available.