Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Lexus IS F. 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 problem symptoms If multiple suspected areas are listed, 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.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Front Wiper and Washer System
SYMPTOM CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Wiper and washer systems do not operate at all | Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT |
| Main body ECU LH (Cowl side junction block LH) | - | |
| Wiper system does not operate at all | FR WIP, J/B, R/B, ALT fuse | - |
| Wiper motor power source circuit | WIPER MOTOR POWER SOURCE CIRCUIT | |
| Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT | |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Main body ECU LH (Cowl side junction block LH) | - | |
| 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 | |
| Main body ECU LH (Cowl side junction block LH) | - | |
| Wiper system does not operate (HI) | Wiper switch (Hi-speed) circuit | WIPER SWITCH (HI SPEED) CIRCUIT |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Main body ECU LH (Cowl side junction block LH) | - | |
| Wiper system does not stop | Wiper switch (Hi-speed) circuit | WIPER SWITCH (HI SPEED) CIRCUIT |
| Front wiper motor circuit | FRONT WIPER MOTOR CIRCUIT | |
| Main body ECU LH (Cowl side junction block LH) | - | |
| Washer system does not operate | WASHER, R/B, ALT fuse | - |
| Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT | |
| Washer motor circuit | WASHER MOTOR CIRCUIT | |
| Front controller (Multiplex network body ECU) | - | |
| Main body ECU LH (Cowl side junction block LH) | - |
Auto Wiper System
SYMPTOM CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Auto wiper system does not operate (manual operation is normal) | Rain sensor tape*1 | - |
| ECU-IG LH fuse | - | |
| Wiper and washer switch circuit | WIPER AND WASHER SWITCH CIRCUIT | |
| Rain sensor circuit | RAIN SENSOR CIRCUIT | |
| Rain sensor | RAIN SENSOR | |
| Main body ECU LH (Cowl side junction block LH) | - |
Headlight Cleaner System
SYMPTOM CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Headlight cleaner system does not operate at all (Low beam headlight system and washer system are normal) | H-LP CLN, J/B, R/B, ALT fuse | - |
| Headlight cleaner switch circuit | HEADLIGHT CLEANER SWITCH CIRCUIT | |
| Headlight cleaner motor and relay circuit | HEADLIGHT CLEANER MOTOR AND RELAY CIRCUIT | |
| Main body ECU RH (Cowl side junction block RH) | - | |
| Front controller (Multiplex network body ECU) | - | |
| Headlight cleaner control relay | - |
Others
SYMPTOM CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Washer fluid level warning system does not operate | Washer fluid level warning switch circuit | WASHER FLUID LEVEL WARNING SWITCH CIRCUIT |
| Front controller (Multiplex network body ECU) | - | |
| Combination meter | - | |
| HINT *1 Before inspecting the rain sensor, first check if the rain sensor tape is correctly installed. |
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