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Home >> Lexus >> 2006 >> RX 400h FWD >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper And Washer >> Wiper And Washer System >> Problem Symptoms Table

Problem Symptoms Table

FRONT WIPER AND WASHER SYSTEM (W/O AUTO WIPER SYSTEM) 

FRONT WIPER AND WASHER SYSTEM (W/O AUTO WIPER SYSTEM)

Symptom Suspected area See
Front wiper system do not operate. 1. IG1 relay -
2. FR WIP fuse -
3. Windshield wiper switch assembly WIPER SWITCH 
4. Windshield wiper motor assembly FRONT WIPER MOTOR 
5. Wire harness or connector -
Front wipers do not operate in LO or HI. 1. Windshield wiper switch assembly WIPER SWITCH 
2. Windshield wiper motor assembly FRONT WIPER MOTOR 
3. Wire harness or connector -
Front wipers do not operate in INT. 1. Windshield wiper switch assembly WIPER SWITCH 
2. Windshield wiper motor assembly FRONT WIPER MOTOR 
3. Wire harness or connector -
Front washer motor does not operate. 1. WASHER fuse -
2. Windshield wiper switch assembly WIPER SWITCH 
3. Windshield washer motor assembly -
4. Wire harness or connector -
Front wiper do not operate when front washer switch is ON. 1. Windshield wiper switch assembly WIPER SWITCH 
2. Windshield wiper motor assembly FRONT WIPER MOTOR 
3. Wire harness or connector -
Washer fluid does not operate. 1. Washer hose and nozzle -
When front wiper switch is in HI position, the wiper blade is in contact with the body. 1. Front wiper arm installation position -
2. Windshield wiper motor assembly FRONT WIPER MOTOR 
When the front wiper switch is OFF, the wiper blade does not retract or retract in the wrong position. 1. Front wiper arm installation position -
2. Windshield wiper motor assembly FRONT WIPER MOTOR 

FRONT WIPER AND WASHER SYSTEM (W/AUTO WIPER SYSTEM) 

FRONT WIPER AND WASHER SYSTEM (W/AUTO WIPER SYSTEM)

Symptom Suspected area See
Front wipers do not operate. 1. Power source circuit POWER SOURCE CIRCUIT 
2. Wiper and washer switch circuit WIPER AND WASHER SWITCH CIRCUIT 
3. Front wiper motor circuit FRONT WIPER MOTOR CIRCUIT 
4. Windshield wiper relay assembly -
Front wipers do not operate in LO or HI. 1. Power source circuit POWER SOURCE CIRCUIT 
2. Wiper and washer switch circuit WIPER AND WASHER SWITCH CIRCUIT 
3. Front wiper motor circuit FRONT WIPER MOTOR CIRCUIT 
4. Windshield wiper relay assembly -
Front wipers do not operate when front washer switch is ON. 1. Wiper and washer switch circuit WIPER AND WASHER SWITCH CIRCUIT 
2. Front wiper motor circuit FRONT WIPER MOTOR CIRCUIT 
3. Windshield wiper relay assembly -
Auto wiper system does not operate. 1. Power source circuit POWER SOURCE CIRCUIT 
2. Wiper and washer switch circuit WIPER AND WASHER SWITCH CIRCUIT 
3. Front wiper motor circuit FRONT WIPER MOTOR CIRCUIT 
4. Rain sensor circuit RAIN SENSOR CIRCUIT 
5. Rain sensor RAIN SENSOR 
6. Windshield wiper relay assembly -
Front washer motor does not operate. 1. WASHER fuse -
2. Wiper and washer switch circuit WIPER AND WASHER SWITCH CIRCUIT 
3. Windshield wiper relay assembly -
Washer fluid does not operate. 1. Washer hose and nozzle -
When front wiper switch is in HI position, the wiper blade is in contact with the body. 1. Front wiper arm installation position -
2. Windshield wiper motor assembly FRONT WIPER MOTOR 
When the front wiper switch is OFF, the wiper blade does not retract or retract in the wrong position 1. Front wiper arm installation position -
2. Windshield wiper motor assembly FRONT WIPER MOTOR 

REAR WIPER AND WASHER SYSTEM 

REAR WIPER AND WASHER SYSTEM

Symptom Suspected area See
Rear wiper and washer do not operate. 1. AMI fuse -
2. RR WIP fuse, WASHER fuse -
3. IG1 relay -
4. Windshield wiper switch assembly WIPER SWITCH 
5. Wire harness or connector -
Rear wiper does not operate in INT. 1. RR WIP fuse -
2. Windshield wiper switch assembly WIPER SWITCH 
3. Rear wiper motor assembly REAR WIPER MOTOR 
4. Wire harness or connector -
Rear washer motor does not operate. 1. WASHER fuse -
2. Windshield wiper switch assembly WIPER SWITCH 
3. Rear wiper motor assembly REAR WIPER MOTOR 
4. Wire harness or connector -
Rear wiper does not operate when washer switch is ON. 1. Windshield wiper switch assembly WIPER SWITCH 
2. Rear wiper motor assembly REAR WIPER MOTOR 
3. Wire harness or connector -
Rear washer fluid does not operate. 1. Washer hose and nozzle -
When rear wiper switch is in ON position, the wiper blade is in contact with the body. 1. Rear wiper blade installation position REAR WIPER BLADE INSTALLATION POSITION 
2. Rear wiper motor assembly REAR WIPER MOTOR 
When the wiper switch is OFF, the wiper blade does not retract or retract in the wrong position. 1. Rear wiper blade installation position REAR WIPER BLADE INSTALLATION POSITION 
2. Rear wiper motor assembly REAR WIPER MOTOR 

HEADLIGHT CLEANER SYSTEM 

HEADLIGHT CLEANER SYSTEM

Symptom Suspected area
Headlight cleaner system does not operate. 1. HEADLIGHT CLEANER MOTOR AND RELAY CIRCUIT 
2. HEADLIGHT CLEANER SWITCH CIRCUIT 
3. Headlight cleaner control relay