DTC B3596
Diagnostic Instructions
DTC Descriptor
| DTC B3596 00: Hazard Lamps Request Circuit
Malfunction |
Diagnostic Fault Information
Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
|
Hazard Lamps Request Signal
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B3596 00
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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
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
Circuit/System Verification
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.
Circuit/System Testing
| 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 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 S26 Hazard Lamps Switch. |
Component Testing
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 10 and terminal
7. |
| ⇒ |
If less than the specified value, replace the S26
Hazard Lamps Switch. |
| 3. |
Press and hold the S26 Hazard
Lamps Switch, test for less than 5 Ω of resistance between
the S26 Hazard Lamps Switch terminal 10 and terminal 7.
|
| ⇒ |
If not within the specified range, replace the S26
Hazard Lamps Switch. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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