Wiper Signal Circuit [12/2013 - 11/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DRIVING SUPPORT ECU ASSEMBLY (WIP2 VOLTAGE)

Disconnect the F84 driving support ECU assembly connector.

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*a	Front view of wire harness connector (to Driving Support ECU Assembly)

Turn the engine switch on (IG).

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
F84-32 (WIP2) - Body ground	Engine switch on (IG), windshield wiper switch assembly HI position	11 to 14 V

Turn the engine switch off.

Reconnect the F84 driving support ECU assembly connector.

Result

Proceed to
OK
NG

Result: 1

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [12/2013 - 11/2016]

Result: 2

See step 2

CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY)

Disconnect the F84 driving support ECU assembly connector.
Disconnect the F64 windshield wiper switch assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
F84-32 (WIP2) - F64-4 (+2)	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
F84-32 (WIP2) or F64-4 (+2) - Body ground	Always	10 kΩ or higher

Reconnect the F64 windshield wiper switch assembly connector.

Reconnect the F84 driving support ECU assembly connector.

Result

Proceed to
OK
NG

Result: 1

GO TO WIPER AND WASHER SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2015] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ]

Result: 2

REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY)