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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Hazard Lamps Switch Signal | 1 | 1 | 1 | B3596 00 |
Hazard Lamps Switch Ground | -- | 1 | -- | -- |
1. Hazard Lamps Malfunction |
The hazard flashers may be activated in any power mode. The hazard switch signal circuit is momentarily grounded when the hazard switch is pressed. The body control module (BCM) responds to the hazard switch signal input by supplying battery voltage to all four indicator lamps in an ON and OFF duty cycle. When the hazard switch is activated, the BCM sends a serial data message to the instrument panel cluster requesting both indicator indicators to be cycled ON and OFF.
Exterior Lighting Systems Description and Operation
Control Module References for scan tool information
⇒ | If the parameter does not change between the commanded states, refer to Circuit/System Testing. |
⇒ | If the indicator lamps do not cycle between the selected states, refer to Indicator Lamps and/or Indicators Malfunction . |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the signal circuit terminal 16 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module. |
⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, programming and setup |
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