Toyota Yaris: Active Torque Split Awd System / Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Symptom | Suspected Area | Link |
Tight-corner braking phenomenon* | Steering sensor |
|
Brake control system |
|
AWD ECU assembly |
|
Transmission coupling assembly |
|
AWD warning message remains displayed | AWD warning light circuit |
|
AWD warning message is not displayed | AWD warning light circuit |
|
AWD control switch (No. 2 combination switch assembly) does not operate | AWD control switch (No. 2 combination switch assembly) circuit |
|
HINT:
*: Tight corner braking phenomenon: a phenomenon in which a AWD vehicle may lurch and decelerate due to a rotational speed difference between the front and rear wheels, such as during low-speed cornering in AWD mode.
CALIBRATION NOTICE:
When the AWD ECU assembly is replaced, before removing the AWD ECU assembly, it is necessary to perform ECU Data Save to save the original AWD ECU assembly information...
DTC CHECK / CLEAR DTC CHECK (a) Check for DTC(s). Chassis > Four Wheel Drive > Trouble Codes (b) Check the details of the DTCs. NOTICE:
Make sure to clear the DTCs after repair...
Other information:
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B278987 ID-BOX Missing Message No communication between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) for 10 seconds or more...
REMOVAL CAUTION / NOTICE / HINT NOTICE: Make sure to use Toyota Genuine Windshield Glass Adhesive (High Modulus Type) or equivalent. PROCEDURE 1. REMOVE BACK DOOR OUTSIDE GARNISH SUB-ASSEMBLY Click here
2. REMOVE REAR SPOILER ASSEMBLY Click here
3...
Categories
No special break-in is necessary, but a few precautions in the first 600
miles (1,000 km) may add to the performance, economy, and life of
the vehicle.
Do not race the engine.
Do not maintain one constant speed, either slow or fast, for a long
period of time.
Do not drive constantly at full-throttle or high engine rpm for
extended periods of time.
Avoid unnecessary hard stops.
Avoid full-throttle starts.
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