Toyota Tundra Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

Before replacing the ECM, refer to Registration.

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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.

Symptom

Suspected Area

Link

The cruise control system cannot be turned on using the cruise control main switch (ON-OFF button) (The cruise control indicator does not illuminate)

CAN communication system

Cruise control indicator light circuit

Cruise control switch circuit

Combination meter assembly

ECM (for 1UR-FE)

ECM (for 3UR-FE)

The cruise control SET indicator does not illuminate (Vehicle speed can be set)

CAN communication system

Cruise SET indicator light circuit

Combination meter assembly

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Vehicle speed cannot be set (The cruise control indicator illuminates when the cruise control system is turned on using the cruise control main switch (ON-OFF button), but the cruise control indicator turns off when the cruise control main switch is pushed to -SET)

Cruise control switch circuit

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Vehicle speed cannot be set (The cruise control indicator illuminates when the cruise control system is turned on using the cruise control main switch (ON-OFF button), and it remains illuminated when the cruise control main switch is pushed to -SET)

Inspect the fail-safe control list

CAN communication system

Cruise control switch circuit

Stop light switch circuit

Automatic Transmission System (for A760E)

Automatic Transmission System (for A760F)

Automatic Transmission System (for AB60E)

Automatic Transmission System (for AB60F)

Vehicle stability control system

Combination meter assembly

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Vehicle speed control by the cruise control system is automatically canceled after it has started

Inspect the fail-safe control list

CAN communication system

Cruise control switch circuit

Stop light switch circuit

Automatic Transmission System (for A760E)

Automatic Transmission System (for A760F)

Automatic Transmission System (for AB60E)

Automatic Transmission System (for AB60F)

Vehicle stability control system

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Hunting (Speed is not constant)

Automatic Transmission System (for A760E)

Automatic Transmission System (for A760F)

Automatic Transmission System (for AB60E)

Automatic Transmission System (for AB60F)

SFI system (for 1UR-FE)

SFI system (for 3UR-FE)

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Pulling back on the cruise control main switch does not cancel vehicle speed control by the cruise control system

Cruise control switch circuit

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Vehicle speed control by the cruise control system is not canceled when vehicle speed drops below the low speed limit

Vehicle stability control system

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Moving the shift lever does not cancel vehicle speed control by the cruise control system

Park/Neutral position switch assembly (for A760E)

Park/Neutral position switch assembly (for A760F)

Park/Neutral position switch assembly (for AB60E)

Park/Neutral position switch assembly (for AB60F)

Column shift shift lever sub-assembly (for A760E) (for Column Shift Type)

Transmission floor shift assembly (for A760E) (for Floor Shift Type)

Column shift shift lever sub-assembly (for A760F) (for Column Shift Type)

Transmission floor shift assembly (for A760F) (for Floor Shift Type)

Column shift shift lever sub-assembly (for AB60E) (for Column Shift Type)

Transmission floor shift assembly (for AB60E) (for Floor Shift Type)

Column shift shift lever sub-assembly (for AB60F) (for Column Shift Type)

Transmission floor shift assembly (for AB60F) (for Floor Shift Type)

ECM (for 1UR-FE)

ECM (for 3UR-FE)

Depressing the brake pedal does not cancel vehicle speed control by the cruise control system

Stop light switch circuit

ECM (for 1UR-FE)

ECM (for 3UR-FE)

    Precaution

    Road Test

    See More:

    Toyota Tundra Service Manual > Meter / Gauge System: Lost Communication with ECM / PCM "A" (U0100)
    DESCRIPTION The combination meter communicates with the ECM via the CAN line. DTC Code DTC Detection Condition Trouble Area U0100 When either of following conditions is detected: Vehicle speed 5 km/h (3 mph) or more and IG voltage 10.5 V or more No communication with ECM continues for 3 seconds or m ...

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