Washer Malfunction (Front) - Suzuki XL7 2007 Service Manual

9D-21 Wipers / Washers:

Washer Malfunction (Front)

Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provides an overview of each diagnostic
category.
Diagnostic Fault Information
Circuit
Windshield Washer Switch Signal
Windshield Washer Fluid Pump Control
Windshield Washer Relay Control
Windshield Washer Fluid Pump Ground
1. Washer Inoperative
2. Washers Always ON
Circuit/System Description
The body control module (BCM) controls the washer
motor based on an input from the windshield wiper
washer switch. The BCM monitors the washer switch
through the windshield washer switch signal circuit.
When the WASH switch is closed, ground is supplied to
the windshield washer switch signal circuit. When this is
seen, the BCM will command the windshield washer fluid
pump and the low speed wipers on.
Reference Information
Schematic Reference
"Wiper/Washer Schematics"
Connector End View Reference
"Wiper/Washer Connector End Views"
Description and Operation
"Wiper/Washer System Description and Operation"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
• "Scan Tool Output Controls - Wipers/Washer
Systems"
• "Scan Tool Data List - Wipers/Washer Systems"
• "Scan Tool Data Definitions - Wipers/Washer
Systems"
Short to Open/High
Ground Resistance
2 1
1 1
2 1
— 1
Circuit/System Verification
1. Ignition ON, wiper switch in the OFF position,
observe the scan tool Windshield Washer Switch
parameter while cycling the WASH switch ON and
OFF. The parameter should cycle between Active
and Inactive.
➢ If the parameter does not cycle between the
specified values, refer to Windshield Wiper Switch
Circuit Malfunction.
2. Operate the washers using the WASH switch. Verify
the washer pump activates and the low speed wipers
turn on.
➢ If the washer pump does not activate, refer to
Washer Pump Circuit Malfunction.
➢ If the low speed wipers do not turn on, refer to
"Windshield Wiper System Malfunction (Front)"
"Windshield Wiper System Malfunction (Rear)".
Circuit/System Testing
Windshield Wiper Switch Circuit Malfunction
1. Ignition OFF, disconnect the harness connector at
the windshield wiper switch.
2. Ignition OFF, test for less than 20 ohms of resistance
between the ground circuit terminal D and ground.
➢ If greater than the specified range, test the ground
circuit for an open/high resistance. If the circuit test
normal, replace the BCM.
3. Ignition ON, verify the scan tool Windshield Washer
Switch parameter is Inactive.
➢ If not the specified value, test the signal circuit
terminal B for a short to ground. If the circuit tests
normal, replace the BCM.
4. Install a 3A fused jumper wire between the signal
circuit terminal B and ground. Verify the scan tool
Windshield Washer 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 BCM.
Signal
Short to Voltage
Performance
1
2
B3873 00
—
—
—
—
—