Circuit Description
The intermittent switch in the windshield wiper washer switch is a voltage divider connected across the body control module (BCM) inputs circuits windshield wiper switch signal 1 circuit and windshield wiper switch signal 2 circuit. The front wiper relay is energized by the BCM switching the front wiper relay control circuit to ground.
The intermittent wiper delay switch has 3 switch positions.
| • | Delay 1 (500 ohms resistance) |
| • | Delay 2 (1000 ohms resistance) |
| • | Delay 3 (2000 ohms resistance) |
Refer to Wiper/Washer System Description and Operation for the timing of each delay position.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3703 Intermittent Wiper Delay Input Circuit High
Conditions for Running the DTC
The ignition is in RUN or ACC position.
Conditions for Setting the DTC
| • | The windshield wiper switch signal 1 circuit is greater than 4.71 volts (open or shorted to voltage). |
| • | The windshield wiper switch signal 2 circuit is open. |
Actions Taken When the DTC Sets
| • | No light will illuminate in the instrument panel (I/P). |
| • | Cannot vary wiper speed. |
Conditions for Clearing the DTC
| • | A current DTC clears when the fault is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault. |
Diagnostic Aids
| • | Inspect the wiring harness for damage. Check for broken or chaffed insulation. |
| • | If a fault is suspected to be intermittent, wiggling the harness wiring may help in locating the fault. |
| • | Check for a poor connection at the BCM. Inspect harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals, and poor terminal-to-wire connection (terminal crimped over wire insulation and not conductors). |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Is the voltage greater than 4.71 volts? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Is the voltage less than 4 volts? | Go to Step 4 | Go to Step 5 |
4 | Measure voltage on the windshield wiper switch signal 1 circuit to ground. Is the voltage between 4-6 volts? | Go to Step 7 | Go to Step 8 |
5 | Is voltage between 4-6 volts? | Go to Step 6 | Go to Step 9 |
6 | Using a fused jumper, jumper the windshield wiper switch signal 1 circuit to the windshield wiper switch signal 2 circuit at the harness connector. Is the voltage less than 0.4 volts? | Go to Step 11 | Go to Step 10 |
7 | Test the windshield wiper switch signal 2 circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
8 | Test the windshield wiper switch signal 1 circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
9 | Test the windshield wiper switch signal 1 circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
10 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the windshield wiper washer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 12 | -- |
12 |
Does the DTC reset? | Go to Step 2 | System OK |
