DESCRIPTION & OPERATION
Note. This article also applies to Lexus LX470. Refer to Land Cruiser, unless otherwise indicated.
| WARNING | Deactivate air bag system before performing any service operation. See AIR BAG RESTRAINT SYSTEMS. DO NOT apply electrical power to any component on steering column without first deactivating air bag system. Air bag may deploy. |
All models are equipped with 2-speed wiper motors. An intermittent wiper system is optional. Front wiper motors are protected by an internal circuit breaker. Celica, Land Cruiser, LX 470, RAV4, Sienna and 4Runner are equipped with rear wipers.
Celica (Intermittent Operation Check)
Connect fused jumper between battery voltage and terminal No. 1. Connect jumper wire from negative battery terminal to wiper motor terminal No. 2 and motor body. (Scheme 1) Motor should operate intermittently for about 9-15 seconds. Replace motor and relay as a complete assembly if operation is not as specified.
RAV4 (Relay Operation Check)
Disconnect rear wiper relay. Connect fused jumper between battery voltage and relay terminal No. 3. Connect another jumper wire between ground and terminal No. 6. (Scheme 2) Connect positive lead of DVOM to relay terminal No. 5 and negative lead to terminal No. 6. Voltage should be zero. Move DVOM positive lead from terminal No. 5 to terminal No. 4. Observe DVOM. Reading should change from zero volts to battery voltage. If voltage readings are not as specified, replace relay.
RAV4 & Sienna (Intermittent Operation Check)
Remove rear wiper relay. Connect fused jumper between battery voltage and relay terminal No. 5 and connect jumper wire between ground and terminal No. 2 for longer than 2 seconds. (Scheme 2) Connect positive lead of analog voltmeter to relay terminal No. 4 and negative lead to terminal No. 2. Move battery voltage lead from terminal No. 5 to terminal No. 3. Observe meter. Reading should change from zero volts to battery voltage within 9 to 15 seconds. If readings are not as indicated, replace relay.
Sienna (Relay Operation Check)
Remove rear wiper relay. Connect fused jumper between battery voltage and relay terminal No. 3 and connect jumper wire between ground and terminal No. 6. (Scheme 2) Connect DVOM positive lead to relay terminal No. 3 and negative lead to terminal No. 6. Zero volts should be indicated. Connect DVOM positive lead to relay terminal No. 4 and negative lead to terminal No. 6. Battery voltage should be indicated. If readings are not as specified, replace rear wiper relay.
| Model | Location |
|---|---|
| Celica | Inside Back Door, At Rear Wiper Motor |
| Land Cruiser, LX 470 & 4Runner | Inside Back Door, To Left Of Motor |
| Sienna | Under Passenger Front Seat |
| RAV4 | Instrument Panel Fuse Block |
REAR WIPER RELAY LOCATION
