2010 Cadillac CTS Sedan AWD V6-3.6L Page 645
* The BCM will not activate the low speed output.
* The windshield wipers will only operate in the high speed mode.
Conditions for Clearing the DTC
* The DTC will clear the current status when the condition for setting the fault is corrected.
* A history DTC will clear after 50 consecutive ignition cycles without a fault present.
Reference Information
Schematic Reference
Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Wiper/Washer System Description and Operation (Wiper and Washers) (See: Wiper and Washer Systems/Description and
Operation/Wiper/Washer System Description and Operation (Wiper and Washers))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Windshield Wiper Switch parameter while rotating the wiper switch. The reading should change between Off,
Intermittent, and Low.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the turn signal multifunction switch.
2. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is OFF.
瀚慖f not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM.
3. If all circuits test normal, test or replace the turn signal multifunction switch.
Component Testing
Turn Signal Multifunction Switch
1. Ignition OFF, disconnect the harness connector at the turn signal multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohm between the low reference terminal 2 and the signal terminal 3.
瀚慖f greater than the specified range, replace the windshield wiper washer switch.
Note: If the switch tests open in any switch position other than Off, test the signal circuits for a short to voltage before replacing the switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal 2
and the signal terminal 1.
