Orlando |
||||||||
|
|
|
|||||||
| • | 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 |
|---|---|---|---|---|
Rain Sensor B+ | 1 | 1 | -- | -- |
Rain Sensor Signal | B370A 39 | B370A 39 | B370A 39 | B370A 39 |
Rain Sensor Ground | -- | 1 | 1 | -- |
1. Windscreen Outside Moisture Sensor Malfunction | ||||
B+ voltage is supplied to the windscreen outside moisture sensor. Whenever the ignition is ON, or in accessory positions, the body control module (BCM), sends the wiper/washer switch status by using a pulse width modulated (PWM) signal. When a wipe cycle is needed, the windscreen outside moisture sensor sends a PWM voltage signal to the BCM, initiating the wiper operation. The BCM commands the windscreen wiper motor wipe cycles. If a fault occurs at any time between the windscreen outside moisture sensor and BCM, the BCM will use the inputs from the indicator/multifunction switch in the delay positions to operate the windscreen wiper motor at continuous variable delay intervals.
| • | Ignition ON. |
| • | The system voltage is between 9–16 V. |
The BCM receives an invalid signal from the windscreen outside moisture sensor.
| • | If the BCM loses communication with the windshield outside moisture sensor while the windshield outside moisture sensor was requesting single wipes, it shall fail soft the wipers operation to front wiper manual-intermittent with a fixed dwell time of 4 seconds. |
| • | If the BCM loses communication with the windshield outside moisture sensor while the windshield outside moisture sensor was continuously requesting low, it shall fail soft the wipers operation to front wiper manual-low. |
| • | If the BCM loses communication with the windshield outside moisture sensor while the windshield outside moisture sensor was continuously requesting high, it shall fail soft the wipers operation to front wiper manual-high. |
A current DTC clears when the diagnostic runs and passes.
Wiper/Washer System Description and Operation
Control Module References for scan tool information
If this DTC is set, replace the B117 rain sensor.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
| © Copyright Chevrolet. All rights reserved |
