Pinpoint Test C: The Windshield Wipers Stay On Continuously
Wipers and Washers
Pinpoint Test C: The Windshield Wipers Stay On Continuously
Normal Operation
The wiper relay (located in the Battery Junction Box (BJB) ) is energized when the ignition is ON. The wiper relay provides voltage to the wiper motor. The multifunction switch is mounted to the Steering Column Control Module (SCCM). The SCCM (Steering Column Control Module) commands the wiper motor to activate the appropriate wash, low, high and intermittent modes through a Local Interconnect Network (LIN).
When the multifunction switch is in the HIGH position, the wiper motor receives ground which is hardwired directly through the SCCM (Steering Column Control Module) (bypassing the logic within the SCCM (Steering Column Control Module) and the wiper motor). This fail-safe circuit makes sure that the wipers function in HIGH speed mode in the event of a LIN (Local Interconnect Network) communication failure.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wiper relay
- Multifunction switch
- Wiper motor
- SCCM (Steering Column Control Module)
PINPOINT TEST C : THE WINDSHIELD WIPERS STAY ON CONTINUOUSLY
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
C1 CHECK THE WINDSHIELD WIPER OPERATION WITH THE IGNITION OFF
- Ignition OFF.
- Observe the windshield wiper operation.
Are the windshield wipers operating?
Yes
GO to C2.
No
GO to C3.
C2 CHECK THE WIPER RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: Wiper Relay.
- Observe the windshield wiper operation.
Do the windshield wipers continue to operate?
Yes
REPAIR the circuit.
No
INSTALL a new wiper relay.
C3 CHECK THE MULTIFUNCTION SWITCH INPUT
- Ignition ON.
- Make sure the multifunction switch is in the off setting.
- Using a scan tool, monitor the SCCM (Steering Column Control Module) multifunction switch PIDs:
- F_WASH_SW
- F_WIP_INT_D1
- F_WIP_INT_D2
- F_WIP_INT_D3
- F_WIP_INT_D4
- F_WIP_INT_D5
- F_WIP_SLO_SW
- F_WIPE_FAST_SW
Are all of the PIDs displayed as OFF?
Yes
GO to C4.
No
INSTALL a new multifunction switch.
If the concern is still present, INSTALL a new SCCM (Steering Column Control Module). TEST the system for normal operation.
C4 CHECK THE WINDSHIELD WIPER OPERATION WITH THE SCCM (Steering Column Control Module) DISCONNECTED
- Ignition OFF.
- Disconnect: SCCM (Steering Column Control Module) C2414A.
- Ignition ON.
- Observe the windshield wiper operation.
Do the windshield wipers continue to operate?
Yes
GO to C5.
No
INSTALL a new multifunction switch. TEST the system for normal operation. If the concern is still present, GO to C6.
C5 CHECK THE HIGH SPEED FAIL-SAFE CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C125-1 CRW15 (BN/WH)- Ground
Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor .
No
REPAIR the circuit.
C6 CHECK FOR CORRECT SCCM (Steering Column Control Module) OPERATION
- Disconnect and inspect all SCCM (Steering Column Control Module) connectors.
- Repair:
- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary
- Reconnect the SCCM (Steering Column Control Module) connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs (Technical Service Bulletins). If a TSB (Technical Service Bulletin) exists for this concern, DISCONTINUE this test and FOLLOW TSB (Technical Service Bulletin) instructions. If no TSBs (Technical Service Bulletins) address this concern, INSTALL a new SCCM (Steering Column Control Module).
No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.