Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
HINT.
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table Check each symptom by checking the suspected areas in the order they are listed Replace parts as necessary
Front wiper and washer system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Reference |
|---|---|---|
| Wiper and washer systems do not operate at all | Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT |
| Front controller | - | |
| Wiper system does not operate at all | WIP fuse | - |
| Wiper motor power source circuit | ECU POWER SOURCE CIRCUIT | |
| Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT | |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Front controller | - | |
| Wiper system does not operate (LO, INT) | Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Front controller | - | |
| Wiper system does not operate (HI) | Wiper switch (Hi-speed) circuit | WIPER SWITCH (HI SPEED) CIRCUIT |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Front controller | - | |
| Wiper system does not stop | Wiper switch (Hi-speed) circuit | WIPER SWITCH (HI SPEED) CIRCUIT |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Front controller | - | |
| Washer system does not operate | Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT |
| Washer motor circuit | WASHER MOTOR CIRCUIT | |
| Front controller | - |
Auto wiper system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Reference |
|---|---|---|
| Auto wiper system does not operate (manual operation) | Rain sensor circuit | RAIN SENSOR CIRCUIT |
| Ram sensor | - | |
| Front controller | - |
Headlight cleaner system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Reference |
|---|---|---|
| Headlight cleaner system does not operate at all | Headlight cleaner switch circuit | INSPECTION |
| Headlight cleaner motor and relay circuit | HEADLIGHT CLEANER MOTOR AND RELAY CIRCUIT | |
| Front controller | - | |
| Headlight cleaner control relay | - |
Other
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Reference |
|---|---|---|
| Washer fluid level warning system does not operate | Washer level warning switch circuit | WASHER FLUID LEVEL WARNING SWITCH CIRCUIT |
| Wire harness | - | |
| Front controller | - |