Suzuki XL7 2007 Service Manual page 2399

Park Lamps Always On
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: "
• "Strategy Based Diagnosis: "
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: "
Diagnostic Fault Information
Circuit
Parklamp Control Circuit
Headlamp Switch Parklamp Signal Circuit
Headlamp Switch Parklamp Ground Circuit
Headlamp Switch
1. Parklamp Always ON
2. Parklamp Inoperative
Circuit/System Description
The body control module (BCM) controls the park lamp
relay by grounding the control circuit on the park lamp
relay when the headlamp switch is turned to the PARK or
the HEAD position. This energizes the park lamp relay,
illuminating the park lamps.
Diagnostic Aids
A short to ground, a short to voltage or an open in the
following location may cause a malfunction to occur:
• The park lamp relay control circuit
• The park lamp relay
• The headlamp switch supply circuit
• The headlamp switch ground circuit
• The headlamp switch
• The BCM
Reference Information
Schematic Reference
"Exterior Lights Schematics"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
• "Scan Tool Data Definitions - Lighting"
• "Scan Tool Data List - Lighting"
• "Scan Tool Output Controls - Lighting"
Circuit/System Verification
Ignition ON, turn the headlamps ON with the headlamp
switch. Observes the park lamps, the park lamps should
be ON.
Circuit/System Testing
Short to Open/High
Ground Resistance
B2585 00 B2585 00
B3867 00 B3867 00
1 2
— 2
1 2
Parklamp Switch Circuit Testing
1. Ignition OFF, disconnect the harness connector at
the headlamp switch.
2. Verify that the park lamps are OFF
➢ If not OFF, test the signal circuit for a short to
ground. If the circuit tests normal, replace the BCM.
3. Install a 3-amp fused jumper wire between the signal
circuit and ground. Verify that the park lamps are
ON.
➢ If not ON, test the signal circuit of the headlamp
switch for a short to voltage or an open/high
resistance. If circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the
headlamp switch.
Component Testing
Parklamp Switch Testing
1. Ignition OFF, disconnect the harness connector at
the headlamp switch.
2. Test for infinite resistance between the signal
terminal and the voltage supply terminal with the
switch in the open position.
➢ If less than infinite resistance, replace the
headlamp switch.
3. Test for less than 1.5 ohms between the signal
terminal and the voltage supply terminal with the
switch in the closed position.
➢ If greater than 1.5 ohms, replace the headlamp
switch.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Control Module References: " for BCM replacement,
setup, and programming
• "Turn Signal Multifunction Switch Replacement: "
Lighting Systems:
Signal
Short to Voltage
Performance
B2585 00
B3867 00
—
2
2
9B-78
—
—
—
—