Circuit Description
When the windshield wiper switch is in the ON position, it sends a voltage signal through a 24K ohm resistor and the windshield wiper switch signal 2 circuit to the windshield wiper/washer module indicating the wiper request. This voltage signal is also sent to the instrument panel module (IPM) indicating the wiper request. When the windshield washer switch is pressed, battery positive voltage is applied through the switch contacts by-passing the 24K ohm resistor, then through the same windshield wiper switch signal 2 circuit to the wiper/washer module and the IPM indicating the washer request. The IPM counts each washer request and on the fourth request it will activate the low side drive output that controls the headlamp washer relay.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2697 Headlamp Washer Request Circuit
Symptom | Symptom Descriptor |
|---|---|
01 | Short to battery voltage |
Conditions for Running the DTC
The IPM must be awake with the ignition in the accessory, run, or crank request power modes.
Conditions for Setting the DTC
The IPM detects battery positive voltage on the windshield wiper switch signal 2 circuit for 30 seconds.
Action Taken When the DTC Sets
The IPM disables the headlamp washer function.
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the Headlamp Washer Switch parameter display ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
3 |
Does the Headlamp Washer Switch parameter display ON? | Go to Step 4 | Go to Step 5 |
4 | Test the windshield wiper switch signal 2 circuit for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
7 | Replace the windshield wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement . Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the IPM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
