| Last Modified: 11-29-2007 | 1.6 T | |
| Service Category: Engine/Hybrid System | Section: Cruise Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000V0F016X |
| Title: CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE (2008 Sequoia) | ||
PROBLEM SYMPTOMS TABLE
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.
Dynamic Laser Cruise Control System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Main switch cannot be turned on. (CRUISE main indicator light on combination meter does not illuminate.) |
Cruise control switch circuit |
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CRUISE main indicator light circuit |
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned on, but turns off when operating SET function.) |
Cruise control switch circuit |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
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|
Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned on, and remains on when operating SET function.) |
Cruise control switch circuit |
|
|
Stop light switch circuit |
|
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|
Transmission range sensor circuit (for A750F) |
|
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|
Transmission range sensor circuit (for A750E) |
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Transmission range sensor circuit (for AB60F) |
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|
Transmission range sensor circuit (for AB60E) |
|
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|
Vehicle speed sensor circuit |
|
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|
Combination meter system |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
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|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
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|
While vehicle is driven with cruise control, the control is canceled. (CRUISE main indicator light remains on.) |
Cruise control switch circuit |
|
|
Vehicle speed sensor circuit |
|
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|
Stop light switch circuit |
|
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|
Combination meter system |
|
|
|
Transmission range sensor circuit (for A750F) |
|
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|
Transmission range sensor circuit (for A750E) |
|
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|
Transmission range sensor circuit (for AB60F) |
|
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|
Transmission range sensor circuit (for AB60E) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Hunting (Speed is not constant.) |
Vehicle speed sensor circuit |
|
|
Malfunction in speed meter circuit |
|
|
|
Laser radar sensor power source circuit |
|
|
|
Distance control ECU power source circuit |
|
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|
Distance control ECU |
|
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|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Vehicle speed setting cannot be canceled. (When coast, acceleration, resume, or set speed change function is operated with control switch.) |
Cruise control switch circuit |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Erroneous detection or lost sight of the vehicle ahead. |
Clean laser radar sensor with soft cloth, etc. |
- |
|
Improper aiming of sensor beam axis |
|
|
|
Alarm buzzer does not sound. |
Skid control buzzer circuit |
|
|
VSC system |
|
|
|
Distance control ECU power source circuit |
|
|
|
Distance control ECU |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE). |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Set distance cannot be changed. |
Combination meter system |
|
|
Distance control switch circuit |
|
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|
Distance control ECU |
|
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
No information on the display |
Combination meter system |
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
No brake control (when decelerating) |
VSC system |
|
|
Distance control ECU power source circuit |
|
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|
Distance control ECU |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Constant speed mode cannot be turned on. |
Cruise control switch circuit |
|
|
Combination meter system |
|
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Vehicle speed setting cannot be canceled with wiper HI or LO. |
Wiper signal circuit |
|
|
Distance control ECU |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
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|
Vehicle speed setting is canceled with washer ON. |
Washer signal circuit |
|
|
Distance control ECU |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Unable to adjust (complete) beam axis of laser radar sensor. |
Check position, distance and angle of reflector |
- |
|
Check installation of laser radar sensor |
|
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|
Laser radar sensor |
|
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|
Distance control ECU |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
|
If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
|
|
|
Cannot change from constant speed control mode to vehicle-to-vehicle distance control mode. |
Cruise control switch circuit |
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 2UZ-FE) |
|
|
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If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM (for 3UR-FE). |
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