Trouble Codes

3F-E Only

 

Get a Haynes, Chilton’s, or a Factory Service Manual (FSM)

For the FSM call Toyota Publications @ (800) 622-2033

 

How do you retrieve the codes? 

 

It’s easier than you think.  Follow the following steps to find out how your engine is running.

  1. Initial Conditions:
    1. Battery voltage 11 volts or more
    2. Throttle valve fully closed (TPS IDL points closed)
    3. Transmission in neutral
    4. Accessories switched “OFF”
    5. Engine at normal operating temperature
  2. Turn the ignition switch “ON”.  DO NOT START ENGINE
  3. Using a jumper wire, connect terminals TE1 and E1 of the check connector.
  4. Read the diagnostic code as indicated by the number of flashes of the “Check Engine” warning light.

 

There will be a series of flashes.  For example, if your ECU showed an error code 13 you would see one flash a pause and then three more flashes.  Then a pause of 2.5 seconds and you would see the single flash again then a short pause then the three flashes again.  Have a pen a paper ready to write when the light starts to flash. 

 

Code Number

System

Problem Diagnosis

-

Normal

This appears when none of the other codes are identified.

11

ECU (+B)

Momentary interruption in power supply to ECU

12

RPM Signal

No “NE” or “G” signal to ECU within 2 seconds after engine has been cranked

13

RPM Signal

No “NE” or “G’ signal to ECU when engine speed is above 1000 RPM

14

Ignition Signal

No “IGF” signal to ECU 6-8 times in succession

21

Oxygen sensor signal or Oxygen sensor heater signal

Detects deterioration of oxygen sensor.

Open or short circuit in oxygen sensor heater

22

Water temp. Sensor signal

Open or short circuit in water temperature sensor signal

24

Intake Air temp. signal

Open or short circuit in intake air temperature signal

25

Air/Fuel ratio lean Malfunction

(1) When air-fuel ratio feedback compensation value or adaptive control value continues at the upper (lean) or lower (rich) limit.  (2) When air-fuel ratio feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition. 

26

Air/Fuel ratio rich Malfunction

NOTE:  For condition (2), neither a lean (Code #25) nor a rich (Code #26) diagnosis is displayed consecutively.

28

No. 2 Oxygen sensor Signal

No. 2 Oxygen sensor heater

Same as code #21

31

Air flow meter signal

Open circuit in VC circuit between VS and E2 when idle contacts are closed.

32

Air flow meter signal

Open circuit in E2 or short circuit between VC and VS

35

HAC sensor signal

Open circuit in altitude compensation sensor signal

41

Throttle position sensor

Open or short circuit in throttle position sensor signal

42

Vehicle Speed sensor signal

No “SPD” signal for 8 seconds when engine speed in between 2000 RPM and 5000 RPM and coolant temperature is below 176° F except when racing the engine

43

Starter signal

No “STA” signal to ECU until engine speed reaches 800 RPM with vehicle not moving

*71

EGR system Malfunction

EGR gas temperature below predetermined level during EGR operation.

51

Switch signal

No “IDL” signal, “NSW” signal or “A/C” signal to ECU, with the check terminals E1 and TE1 shorted.

*

 

California vehicles ONLY

 

Source:
I read my Factory Service Manual (FSM) for this information.  To further understand these codes, I recommend getting at least one good manual to use while you work on your 3F-E.  A FSM may seem like a lot of money but believe me it is worth every penny to help keep your Land Cruiser in good working order.

 

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