Dtc P0135 Oxygen Sensor Heater Circuit (Bank 1 Sensor 1)

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT HEATED OXYGEN SENSOR

CHECK TERMINAL VOLTAGE (+B OF HEATED OXYGEN SENSOR)

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

CHECK WHETHER DTC OUTPUT RECURS

INSPECT NO. 1 INTEGRATION RELAY (MAIN)

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - NO. 1 INTEGRATION RELAY)

DTC P0135 Oxygen Sensor Heater Circuit (Bank 1 Sensor 1)


DESCRIPTION

Refer to DTC P0130 (HILUX_TGN26 RM000000ZQ9015X_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P0135
Open or short in the heater circuit of the oxygen sensor for 0.5 seconds or more (1 trip detection logic).
  1. Open or short in heater circuit of oxygen sensor
  2. Heated oxygen sensor
  3. ECM
HINT:
Sensor 1 refers to the sensor closer to the engine assembly.

MONITOR DESCRIPTION

If the output from the heater terminal of the ECM (HT1A) is at a low level when current is not being supplied to the heated oxygen sensor heater, the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.

MONITOR STRATEGY


Required Sensors/Components
Heated oxygen sensor
Frequency of Operation
Continuous

CONFIRMATION DRIVING PATTERN

  1. Turn the ignition switch to ON and wait for 5 seconds or more.

WIRING DIAGRAM

Refer to DTC P0130 (HILUX_TGN26 RM000000ZQ9015X_02.html).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.INSPECT HEATED OXYGEN SENSOR

  1. Inspect the heated oxygen sensor (HILUX_TGN26 RM000001421012X.html).



NG
REPLACE HEATED OXYGEN SENSOR (HILUX_TGN26 RM000001423011X.html)
OK


2.CHECK TERMINAL VOLTAGE (+B OF HEATED OXYGEN SENSOR)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0135 Oxygen Sensor Heater Circuit (Bank 1 Sensor 1)

  1. Disconnect the heated oxygen sensor connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C78-2 (+B) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Heated Oxygen Sensor)


NG
Go to step 5
OK


3.CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

  1. Disconnect the heated oxygen sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C78-1 (HT1A) - C75-1 (HA1A)
    		Always
    		Below 1 Ω
    C78-1 (HT1A) or C75-1 (HA1A) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK12KX.html).

  1. Start the engine.

  1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

  1. Read the output pending DTCs using the intelligent tester.

    Result
    Result
    		Proceed to
    No pending DTC is output
    		A
    Pending DTC P0135 is output
    		B


B
REPLACE ECM (HILUX_TGN26 RM000000VW202TX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0YLX.html)

5.INSPECT NO. 1 INTEGRATION RELAY (MAIN)

  1. Inspect the No. 1 integration relay (MAIN) (HILUX_TGN26 RM000003BLB021X_01_0019.html).



NG
REPLACE NO. 1 INTEGRATION RELAY
OK


6.CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - NO. 1 INTEGRATION RELAY)

  1. Disconnect the heated oxygen sensor connector.

  1. Remove the No. 1 integration relay from the engine room relay block and junction block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C78-2 (+B) - 1J-5
    		Always
    		Below 1 Ω
    C78-2 (+B) or 1J-5 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

GO TO ECM POWER SOURCE CIRCUIT (HILUX_TGN26 RM000001DN808WX.html)