B3596
DTC B3596
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC B3596 00
-
Hazard Lamps Request Circuit Malfunction
Diagnostic Fault Information
Circuit/System Description
The hazard flashers may be activated in any power mode. The hazard lamp switch is permanently grounded. When the hazard lamp switch is placed in the ON position, ground is applied through the hazard lamp switch signal circuit to the body control module (BCM). The BCM supplies battery voltage to all turn signal lamps in an ON and OFF duty cycle.
Conditions for Running the DTC
Hazard warning switch activated
Conditions for Setting the DTC
Hazard warning switch stuck
Action Taken When the DTC Sets
Hazard flashers malfunction
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
Exterior Lights Schematics Exterior Lights Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
Description and Operation
Exterior Lighting Systems Description and Operation Exterior Lighting Systems
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Hazard Lamps Switch parameter, that when the S48C Multifunction Switch 1 - Instrument Panel Hazard Lamps Switch is pressed and released the scan tool parameter toggle between Active and Inactive.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch 1 - Instrument Panel.
2. Test for less than 5 ohms between the S48C Multifunction Switch 1 - Instrument Panel harness connector ground circuit terminal 7 and ground.
• If greater than the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Hazard Lamp Switch parameter is INACTIVE.
• If not the specified value, test the signal circuit terminal 10 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.
4. Install a 3 A fused jumper wire between the signal circuit terminal 10 and ground. Verify the scan tool Hazard Lamp Switch parameter is ACTIVE.
• 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.
5. If all circuits test normal, replace the S48C Multifunction Switch 1 - Instrument Panel.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch 1 - Instrument Panel.
2. Test for infinite resistance between the S48C Multifunction Switch 1 - Instrument Panel terminal 10 and terminal 7.
• If less than the specified value, replace the S48C Multifunction Switch 1 - Instrument Panel.
3. Press and hold the S48C Multifunction Switch 1 - Instrument Panel, test for less than 5 ohms of resistance between terminal 10 and terminal 7.
• If not within the specified range, replace the S48C Multifunction Switch 1 - Instrument Panel.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Instrument Panel Multifunction Switch Replacement Service and Repair
* Control Module References Control Module References for BCM replacement, programming and setup