Toyota 4Runner manuals

Toyota 4Runner: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

  • If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.
  • *: The air conditioning amplifier stores the DTC of the respective malfunction that has been detected for the period of time indicated in parentheses.

DTC Code

Detection Item

Trouble Area

Memory*

Diagnostic Note

See page

B1412

Ambient Temperature Sensor Circuit

- Cooler thermistor (ambient temperature sensor)

- Harness or connector

- Air conditioning amplifier assembly

Stored

(4 seconds or more)

If the ambient temperature is approx. -52.9°C (-63.22°F) or less, DTC B1412 may be stored even though the system is normal.


B1413

Evaporator Temperature Sensor Circuit

- No. 1 cooler thermistor

- Air conditioning harness assembly

- Air conditioning amplifier assembly

Stored

(4 seconds or more)

-


B1422

Compressor Lock Sensor Circuit

- Cooler compressor assembly (A/C lock sensor)

- Compressor drive belt

- Harness or connector

- Air conditioning amplifier assembly

- CAN communication system

-

-


B1441

Air Mix Damper Control Servo Motor Circuit (Passenger Side)

- Damper servo sub-assembly (air mix damper servo)

- Air conditioning harness assembly

- Air conditioning amplifier assembly

Stored

(30 seconds or more)

-


B1442

Air Inlet Damper Control Servo Motor Circuit

- Recirculation damper servo sub-assembly

- Air conditioning harness assembly

- Air conditioning amplifier assembly

Stored

(30 seconds or more)

-


B1443

Air Outlet Damper Control Servo Motor Circuit

- Damper servo sub-assembly (mode damper servo)

- Air conditioning harness assembly

- Air conditioning amplifier assembly

Stored

(30 seconds or more)

-


B1497

Communication Malfunction (Bus Ic)

- Air conditioning harness assembly

- Air conditioning amplifier assembly

Stored

(10 seconds or more)

-


U0100

Lost Communication with ECM

- CAN communication system

- ECM

-

-


U0142

Lost Communication with Main Body ECU

- CAN communication system

- Main body ECU (multiplex network body ECU)

-

-


U0155

Lost Communication with Combination Meter

- CAN communication system

- Combination meter assembly

-

-


Ambient Temperature Sensor Circuit (B1412)
DESCRIPTION The cooler thermistor (ambient temperature sensor) is installed in the front part of the cooler condenser assembly. This sensor is connected to the air conditioning amplifier assembly ...

Compressor Lock Sensor Circuit (B1422)
SYSTEM DESCRIPTION The ECM sends the engine speed signal to the air conditioning amplifier assembly via CAN communication. The air conditioning amplifier assembly reads the difference between comp ...

Other materials about Toyota 4Runner:

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" ...

Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch
DESCRIPTION If the auto up/down function does not operate, the cause may be one or more of the following: The ECU in the power window regulator motor determines that the power window regulator motor has not been initialized. The power window ...

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