• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
WPR HI Relay B+ | 1, 2 | 1, 2 | -- | -- |
Windshield Wiper Switch Signal | B3922 00 | 1 | 1 | -- |
Windshield Wiper Switch High Signal | 4 | 2 | 2 | -- |
Windshield Wiper Motor Park Switch Signal | 3 | 3 | -- | -- |
WPR Relay Control | B3715 02 | 1 | 4 | -- |
WPR HI Relay Control | 4 | 2 | B3875 00 | -- |
Windshield Wiper Motor High Speed Control | 2 | 2 | 4 | -- |
Windshield Wiper Motor Low Speed Control | 1 | 1 | 4 | -- |
Windshield Wiper Switch Low Reference | -- | 1, 2 | 1, 2 | -- |
Windshield Wiper Motor Ground | -- | 1, 2, 3 | -- | -- |
WPR Relay Ground | -- | 1 | -- | -- |
1. Delay or Low Speed Wipers Inoperative 2. High Speed Wipers Inoperative 3. Wipers Do Not Park 4. Wipers Always ON |
The body control module (BCM) monitors the wiper high speed relay control circuit only when wiper high speed mode is active. When the wiper high speed mode is requested, the BCM responds by applying a ground through the wiper high speed relay control circuit to the coil side of the relay, energizing the WPR HI Relay.
This DTC can set only when the output is actively being requested by the BCM.
This DTC sets if the BCM detects a short to voltage on the WIPER 2 relay control circuit.
The BCM will not activate the output.
• | The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected. |
• | The history DTC will clear after 50 consecutive ignition cycles without a fault present. |
Wiper/Washer System Description and Operation
Control Module References for scan tool information
Ignition ON, wiper switch in the HIGH position. Verify the windshield wipers are cycling at the high speed.
⇒ | If the high speed wipers are on, test the WIPER 2 relay control circuit terminal 21 for a short to ground. If the circuit tests normal, replace the underhood fuse block. |
⇒ | If the low speed wipers are not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the underhood fuse block. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |