Pinpoint Test D: The Intermittent Wiper Speed Does Not Operate Correctly (High/Low Speeds OK)

Wipers and Washers

Pinpoint Test D: The Intermittent Wiper Speed Does Not Operate Correctly (High/Low Speeds OK)

Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

Under normal operation, the wiper/washer module receives open and ground inputs from the multifunction switch through circuits CRW08 (VT/OG), CRW17 (GN/VT), CRW18 (VT/WH) and CRW19 (BU/OG) to activate the wiper motor in the high, low and intermittent speeds.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Multifunction switch

- Wiper/washer module

PINPOINT TEST D : THE INTERMITTENT WIPER SPEED DOES NOT OPERATE CORRECTLY (HIGH/LOW SPEEDS OK)

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

D1 VERIFY IF THE VEHICLE IS EQUIPPED WITH RAIN SENSITIVE WIPERS

NOTE: If sent here from Pinpoint Test E, GO to D2.

- Inspect the vehicle for rain sensitive wipers.

Is the vehicle equipped with rain sensitive wipers?

Yes
GO to Pinpoint Test E. Pinpoint Test E: The Rain Sensitive Wipers Are Inoperative

No
GO to D2.

D2 CHECK THE MULTIFUNCTION SWITCH

- Ignition OFF.

- Disconnect: Multifunction Switch C202.

- Carry out the Multifunction Switch component test.

Did the multifunction switch pass the component test?

Yes
GO to D3.

No
INSTALL a new multifunction switch. TEST the system for normal operation.

D3 CHECK FOR A SHORT TO GROUND IN THE MULTIFUNCTION SWITCH HARNESS

- Disconnect: Wiper/Washer Module C2157.

- Measure the resistance between ground and wiper/washer module:
- C2157-8, circuit CRW08 (VT/OG), harness side.

- C2157-13, circuit CRW17 (GN/VT), harness side.

- C2157-14, circuit CRW19 (BU/OG), harness side.

- C2157-6, circuit CRW18 (VT/WH), harness side.






Is the resistance greater than 10,000 ohms?

Yes
GO to D4.

No
REPAIR the circuit(s) in question. TEST the system for normal operation.

D4 CHECK FOR AN OPEN IN THE MULTIFUNCTION SWITCH HARNESS

- Measure the resistance between multifunction switch C202, harness side and wiper/washer module C2157, harness side using the following chart:

Multifunction Switch Circuit Wiper/Washer Module C202-16 CRW19 (BU/OG) C2157-14 C202-9 CRW08 (VT/OG) C2157-8 C202-12 CRW17 (GN/VT) C2157-13 C202-11 CRW18 (VT/WH) C2157-6





Is the resistance less than 5 ohms?

Yes
GO to D5.

No
REPAIR the circuit(s) in question. TEST the system for normal operation.

D5 CHECK FOR A SHORT IN THE WIPER/WASHER MODULE HARNESS

- Measure the resistance between multifunction switch C202, harness side, using the following chart:

Multifunction Switch Circuitry Multifunction Switch C202-16 CRW19 (BU/OG)/CRW18 (VT/WH) C202-11 C202-16 CRW19 (BU/OG)/CRW08 (VT/OG) C202-9 C202-16 CRW19 (BU/OG)/CRW17 (GN/VT) C202-12 C202-11 CRW18 (VT/WH)/CRW08 (VT/OG) C202-9 C202-11 CRW18 (VT/WH)/CRW17 (GN/VT) C202-12 C202-9 CRW08 (VT/OG)/CRW17 (GN/VT) C202-12






Is the resistance greater than 10,000 ohms for all measurements?

Yes
GO to D6.

No
REPAIR the circuit(s). TEST the system for normal operation.

D6 CHECK FOR CORRECT WIPER/WASHER MODULE OPERATION

- Disconnect all wiper/washer module connectors.

- Check for:
- corrosion.

- pushed-out pins.


- Connect all wiper/washer module connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new wiper/washer module. REFER to Wiper/Washer Module .

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.