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 circuit, and windshield wiper switch low reference 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 circuit is greater than 4.71 volts, open or shorted to voltage. |
| • | The windshield wiper switch low reference 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 wiring harness for damage. Inspect for broken or chaffed insulation. |
| • | If fault is suspected to be intermittent, wiggling harness wiring may help in locating fault. |
| • | Inspect for 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 is crimped over wire insulation and not conductors. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Master Electrical Component List | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is the voltage greater than the specified value? | 4.71 V | Go to Step 3 | Go to Diagnostic Aids |
3 |
Is the voltage less than the specified value? | 4 V | Go to Step 4 | Go to Step 5 |
4 | Measure the voltage between the windshield wiper switch signal circuit and a good ground. Is the voltage between the specified values? | 4-6 V | Go to Step 7 | Go to Step 8 |
5 | Is the voltage between the specified values? | 4-6 V | Go to Step 6 | Go to Step 9 |
6 | Using a fused jumper, jumper the windshield wiper switch signal circuit to the windshield wiper switch low reference circuit at the harness connector. Is the voltage less than the specified value? | 0.4 V | Go to Step 11 | Go to Step 10 |
7 | Test the windshield wiper switch low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
8 | Test the windshield wiper switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
9 | Test the windshield wiper switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
10 | Replace the BCM. Refer to Control Module References 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 . Did you complete the replacement? | -- | Go to Step 12 | -- |
12 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
