Toyota Tundra Service Manual: Problem Symptoms Table

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.

General

Symptom

Suspected Area

See page

System does not operate at all (Initial check function also does not operate)

Proceed to "Clearance Warning ECU Power Source Circuit"

Replace clearance warning ECU assembly

Sonar Function

Symptom

Suspected Area

See page

Clearance warning indicator indicates front corner sensor is frozen

Clean the sensor surface

Proceed to "Front Clearance Sonar Sensor LH Circuit"

Proceed to "Front Clearance Sonar Sensor RH Circuit"

Replace clearance warning ECU assembly

Clearance warning indicator indicates rear corner sensor is frozen

Clean the sensor surface

Proceed to "Rear Clearance Sonar Sensor LH Circuit"

Proceed to "Rear Clearance Sonar Sensor RH Circuit"

Replace clearance warning ECU assembly

Clearance warning indicator indicates rear center sonar sensor is frozen

Clean the sensor surface

Proceed to "Back Sonar Sensor LH Circuit"

Proceed to "Back Sonar Sensor RH Circuit"

Replace clearance warning ECU assembly

Clearance warning indicator indicates open in rear sensor circuit

Initial check function

Proceed to "Rear Clearance Sonar Sensor RH Circuit"

Proceed to "Back Sonar Sensor RH Circuit"

Proceed to "Back Sonar Sensor LH Circuit"

Proceed to "Rear Clearance Sonar Sensor LH Circuit"

Replace clearance warning ECU assembly

Clearance warning indicator indicates open in front corner sensor circuit

Initial check function

Proceed to "Front Clearance Sonar Sensor LH Circuit"

Proceed to "Front Clearance Sonar Sensor RH Circuit"

Replace clearance warning ECU assembly

System operates even when vehicle speed is 10 km/h (6.2 mph) or more

Proceed to "Vehicle speed signal circuit"

Replace clearance warning ECU assembly

Rear corner and rear center operates when shift lever is not in R, or does not operate even when shift lever is in R

Proceed to "Park / Neutral Position Switch Circuit"

Replace clearance warning ECU assembly

Buzzer Function

Symptom

Suspected Area

See page

Buzzer in combination meter assembly continues to sound indicating a malfunction while the system is on

Precaution

Proceed to "Clearance Warning Buzzer Circuit"

Replace clearance warning ECU assembly

Indicator Function

Symptom

Suspected Area

See page

Detection operation is normal but clearance warning indicator does not illuminate

Precaution

Proceed to "Indicator Circuit"

Replace clearance warning ECU assembly

    Precaution

    Rear Clearance Sonar Sensor LH Circuit

    See More:

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