Cruze

DTC B3596

The hazard flashers may be activated in any power mode. The hazard warning switch is permanently grounded. When the hazard warning switch is placed in the ON position, ground is applied through the hazard warning switch signal circuit to the body control module (BCM). The BCM supplies battery voltage to all indicator lamps in an ON and OFF duty cycle.

Hazard warning switch activated.

Hazard warning switch stuck.

The hazard warning is inoperative.

The condition for setting the DTC is no longer present.

Schematic Reference

Exterior Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Hazard Lamps Switch parameter, that when the S26 Hazard Lamps Switch is pressed and released the scan tool parameter toggle between Active and Inactive.

1. Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
2. Test for less than 5 Ω between the S26 Hazard Lamps Switch harness connector ground circuit terminal 3 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the S26 Hazard Lamps Switch.

3. Connect the harness connector at the S26 Hazard Lamps Switch.
4. Disconnect the harness connector X2 at the K9 Body Control Module.
5. Ignition ON, test for less than 0.3 V at the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.

⇒	If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the S26 Hazard Lamps Switch.

6. Ignition OFF, test for infinite resistance between the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.

⇒	If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the S26 Hazard Lamps Switch.

7. Press the S26 Hazard Lamps Switch ON, test for less than 5 Ω between the K9 Body Control Module X2 harness connector signal circuit terminal 26 and ground.

⇒	If not within the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the S26 Hazard Lamps Switch.

8. If all circuits test normal, replace the K9 Body Control Module.

Static Test

1. Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
2. Test for infinite resistance between the S26 Hazard Lamps Switch terminal 1 and terminal 3.

⇒	If less than the specified value, replace the S26 Hazard Lamps Switch.

3. Press the S26 Hazard Lamps Switch ON, test for less than 5 Ω between the S26 Hazard Lamps Switch terminal 1 and terminal 3.

⇒	If not within the specified range, replace the S26 Hazard Lamps Switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.