Washer Malfunction - Hatchback, Wagon
Diagnostic Instructions
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Windscreen Washer Switch Signal
|
2
|
1
|
1
|
--
|
Washer Fluid Level Switch Signal
|
4
|
3
|
3
|
--
|
Windscreen Washer Fluid Pump Control
|
1
|
1
|
2
|
--
|
Windscreen Washer Relay Control
|
B3873 02
|
B3873 04
|
B3873 01
|
-
|
Washer Fluid Level Switch Ground
|
--
|
3
|
--
|
--
|
Windscreen Washer Fluid Pump Ground
|
--
|
1
|
--
|
--
|
1. Front Washer Inoperative.
2. Front Washer Always ON.
3. Washer Fluid Level Indicator Inoperative.
4. Washer Fluid Level Indicator Always ON.
|
Circuit/System Description
The body control module (BCM) controls the windscreen washer
fluid pump based on an input from the wiper/washer switch. The BCM
monitors the washer switch through the windscreen washer switch
signal circuit. When the wash switch is closed, ground is supplied
to the windscreen washer switch signal circuit. When this is the
case, the BCM will command the windscreen washer fluid pump and the
low speed wipers on.
On some vehicles, warning information (wash fluid low) will be
conveyed via the GMLAN to the controls and displays subsystem
(responsible for display). This subsystem will provide visual
feedback to the customer while in the RUN power mode.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Wiper/Washer System 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 Windscreen Washer
Switch parameter while activating the S82 Windscreen
Wiper/Washer Switch. The parameter should change between Active and
Inactive.
⇒ |
If the value does not change, refer to
Multifunction Switch Malfunction. |
- Operate the windscreen washer using the
S82 Windscreen Wiper/Washer Switch. Verify that the
G24 Windscreen Washer Pump activates. Verify the washer fluid
reservoir is filled up.
⇒ |
If the G24 Windshield Washer Pump does not
run, refer to Washer Pump Malfunction. |
⇒ |
If the G24 Windscreen Washer Pump does not
shut off, test or replace the KR11 Windscreen Washer Pump
Relay. |
Circuit/System Testing
Note: You must perform the
Circuit/System Verification before proceeding with Circuit/System
Testing.
Multifunction Switch Malfunction
- Ignition OFF, Retained Accessory Power OFF, disconnect
the X3 harness connector at the K9 Body Control Module.
- Test for less than 5 Ω between the low reference
circuit terminal 25 and the low reference circuit
terminal 10 while activating the wash function.
⇒ |
If greater than the specified value, test the low
reference circuits for an open/high resistance or a short to
voltage. If the circuit tests normal, replace the
S82 Windscreen Wiper/Washer Switch. |
- Test for greater than 500 kΩ between the low
reference circuit terminal 25 and ground when the
S82 Windscreen Wiper/Washer Switch is not used.
⇒ |
If less than the specified value, test the signal
circuit terminal 25 for a short to ground. If the circuit
tests normal, replace the S82 Windscreen Wiper/Washer
Switch. |
- If all circuits test normal, test or replace the
K9 Body Control Module.
Washer Pump Malfunction
- Ignition OFF, disconnect the harness connector at the
G24 Windscreen Washer Pump.
- Test for less than 5 Ω between ground and the
ground circuits listed below:
⇒ |
If greater than the specified value, test the
ground circuits for an open/high resistance or a short to
voltage. |
- Install a test lamp between the ground circuit
terminal 1 and the control circuit terminal 2.
- Ignition ON, command the Windscreen Washer Relay
Command On and OFF with a scan tool. The test lamp should turn ON
and OFF as commanded.
- If the test lamp does not illuminate as expected, test
the control circuit for an open/high resistance or a short to
ground.
- If all circuits test normal, test or replace the
G24 Windscreen Washer Pump.
Low Washer Fluid Indicator Malfunction
- Verify the washer fluid reservoir is filled up.
- Ignition OFF, disconnect the harness connector at the
B118B Windshield Washer Fluid Level Switch.
- Test for less than 5 Ω between the ground
terminal 2 and ground.
⇒ |
If greater than the specified value, test the
ground circuit for a short to voltage or an open/high
resistance. |
- Ignition OFF, disconnect the harness connector at the
P16 fInstrument Cluster.
- Test for less than 5 Ω between the signal circuit
terminal 1 at the B118B Windscreen Washer Fluid Level
Switch harness connector and signal terminal 29 at the
P16 Instrument Cluster harness connector.
⇒ |
If greater than the specified value, test the
signal circuit for a short to voltage or an open/high
resistance. |
- Reconnect all harness connectors.
- Ignition ON, command the Driver Information Center
Segment test ON and OFF with the scan tool, verify that the low
washer fluid indicator display reacts to ON and OFF positions.
⇒ |
If the low washer fluid indicator display stays
always ON or always OFF, replace the P16 Instrument
Cluster. |
- If the low washer fluid indicator display changes
between ON and OFF, test or replace the B118B Windshield
Washer Fluid Level Switch.
Component Testing
Multifunction Switch Test
- Ignition OFF, disconnect the harness connector at the
S82 Windscreen Wiper/Washer Switch.
- Test for less than 5 Ω between the switch
terminals 2 and 5 while activating the washer
function.
⇒ |
If not the specified value, replace the
S82 Windscreen Wiper/Washer Switch. |
Washer Pump Test
- Ignition OFF, disconnect the harness connector at the
G24 Windscreen Washer Pump.
- Install a 10 A fused jumper wire between the
control terminal 2 and 12 V. Install a jumper wire
between the ground terminal 1 and ground.
- Verify the G24 Windscreen Washer Pump is
activated.
⇒ |
If the G24 Windshield Washer Pump does not
activate, replace the G24 Windshield Washer Pump. |
Relay Test
- Ignition OFF, Retained Accessory Power OFF, disconnect
the harness connector X4 at the K9 Body Control Module.
- Test for 120-160 Ω between the control circuit
terminal 14 X4 and ground.
⇒ |
If less than the specified value, test the control
circuit for a short to ground. |
⇒ |
If greater than the specified value, test the
control circuit for an open/high resistance or a short to
voltage. |
- If all circuits test normal, test or replace the
K9 Body Control Module.
Low Washer Fluid Switch Test
- Ignition OFF, remove the B118B Windshield Washer
Fluid Level Switch.
- B118B Windscreen Washer Fluid Level Switch open,
test for infinite resistance between the signal circuit
terminal 1 and the ground terminal 2.
⇒ |
If not the specified value, replace the
B118B Windscreen Washer Fluid Level Switch. |
- B118B Windscreen Washer Fluid Level Switch
closed, test for less than 5 Ω between the signal circuit
terminal 1 and the ground terminal 2.
⇒ |
If not the specified range, replace the
B118B Windshield Washer Fluid Level Switch. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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