DTC B3588
Diagnostic Instructions
DTC Descriptor
DTC B3588 00: Rear Fog Lamp Switch 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
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Rear Fog Lamp Switch Signal
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B3588 00
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Circuit/System Description
The rear fog lamp switch signal circuit is grounded momentarily
by pressing the rear fog lamp switch. The body control module (BCM)
energizes the rear fog lamp supply voltage circuit which
illuminates the rear fog lamp.
Conditions for Running the DTC
• |
The ignition is turned
ON. |
• |
Low beam or front fog lamps
illuminated. |
• |
Rear fog lamp switch
activated. |
Conditions for Setting the DTC
Rear fog lamp switch stuck.
Action Taken When the DTC Sets
Rear fog lamp inoperative.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
Fog 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 Rear Fog Lamps Switch
parameter. The reading should change between Active/Inactive when
changing between pressed and released rear fog lamp switch
button.
Circuit/System Testing
Note: At Step 2 the control
lamps does not illuminate in the instrument cluster, also the
ignition is on.
1. |
Ignition OFF, disconnect the
X1 and X3 harness connector at the K9 Body Control Module.
|
2. |
Ignition ON, test for less
than 0.3 V at the K9 Body Control Module signal circuit harness
terminal 9 X1 and ground. |
⇒ |
If greater than the specified value, test the
signal circuit for an short to voltage. |
3. |
Test for less than 0.3 V at
the K9 Body Control Module 12 V reference circuit harness terminal
4 X3 and ground. |
⇒ |
If greater than the specified value, test the 12 V
reference circuit for a short to voltage. |
4. |
Ignition OFF, test for
infinite resistance between the K9 Body Control Module signal
circuit harness terminal 9 X1 and ground. |
⇒ |
If lower than the specified value, test the signal
circuit for a short to ground. |
5. |
Test for infinite resistance
between the K9 Body Control Module 12 V reference circuit harness
terminal 4 X3 and ground. |
⇒ |
If lower than the specified value, test the 12 V
reference circuit for a short to ground. |
6. |
Press and hold the rear fog
lamp switch button. |
7. |
Test for 2.0-2.4 kΩ
between the K9 Body Control Module 12 V reference circuit harness
terminal 4 X3 and the K9 Body Control Module signal circuit harness
terminal 9 X1. |
⇒ |
If not within the specified range, test the 12 V
reference circuit and the signal circuit for an open/high
resistance. If the circuits test normal replace the S30 Headlamp
Switch. |
8. |
If all circuits test normal,
replace the K9 Body Control Module. |
Component Testing
Static Test
Ignition OFF, disconnect the harness connector at the S30 Headlamp
Switch. Press and hold the rear fog lamp switch button, test for
2.0-2.2 kΩ at the S30 Headlamp Switch terminal 1 and terminal
12.
If not within the specified range replace the S30 Headlamp Switch.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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