Toyota Tundra (2015 year). Manual — part 1906

A

OK

2.

INSPECT OXYGEN SENSOR (CHECK FOR SHORT)

(a) Disconnect the D31 or D32 HO2 sensor connector.

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

Standard resistance

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

2 (+B) - 3 (OX1B)

Always

10 kΩ or higher

2 (+B) - 3 (OX2B)

Always

10 kΩ or higher

2 (+B) - 4 (E1)

Always

10 kΩ or higher

HINT:

Perform "Inspection After Repair" after replacing the heated oxygen sensor

.

NG

REPLACE HEATED OXYGEN SENSOR

3.

CHECK HARNESS AND CONNECTOR

(a) Turn the ignition switch off and wait for 5 minutes.

(b) Disconnect the D74 ECM connector.

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

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D74-45 (HT1B) - D74-114 (OX1B)

Always

10 kΩ or higher

D74-44 (HT2B) - D74-112 (OX2B)

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE ECM

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...

OK

4.

READ VALUE USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON and turn the Techstream on.

(c) Start the engine.

(d) Warm up the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F

Sensor.

HINT:

Fluctuates between 0.4 V or less and 0.5 V or more.

NG

GO TO STEP 6

5.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F
SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and turn the Techstream on.

(c) Warm up the engine.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F

Sensor.

HINT:

DISPLAY ITEM (SENSOR)

VOLTAGE VARIATION

PROCEED TO

AFS Voltage B1S1 (A/F)
AFS Voltage B2S1 (A/F)

Alternating between more and less than 3.3 V

OK

Remains at more than 3.3 V

NG

Remains at less than 3.3 V

NG

HINT:

A normal HO2 sensor voltage (O2S B1 S2 or O2S B2 S2) reacts in accordance with increases and decreases in fuel

injection volumes. When the A/F sensor voltage remains at either less or more than 3.3 V despite the HO2 sensor
indicating a normal reaction, the A/F sensor is malfunctioning.

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...

OK

OK

NG

GO TO STEP 12

OK

CHECK EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO AND

REPAIR CAUSE (FUEL INJECTOR, FUEL PRESSURE, GAS LEAK FROM

SYSTEM, ETC.)

6.

CHECK FOR EXHAUST GAS LEAK

(a) Check for exhaust gas leak.

OK:

No gas leakage.

HINT:

Perform "Inspection After Repair" after repairing or replacing the exhaust system

.

NG

REPAIR OR REPLACE EXHAUST GAS LEAK POINT

7.

INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)

NG

REPLACE HEATED OXYGEN SENSOR

8.

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

(a) Disconnect the D31 or D32 HO2 sensor connector.

(b) Disconnect the D74 ECM connector.

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

Standard resistance:

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...

OK

NEXT

NEXT

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D31-1 (HT1B) - D74-45 (HT1B)

Always

Below 1 Ω

D31-3 (OX1B) - D74-114 (OX1B)

Always

Below 1 Ω

D31-4 (E1) - D74-115 (EX1B)

Always

Below 1 Ω

D32-1 (HT2B) - D74-44 (HT2B)

Always

Below 1 Ω

D32-3 (OX2B) - D74-112 (OX2B)

Always

Below 1 Ω

D32-4 (E1) - D74-113 (EX2B)

Always

Below 1 Ω

D31-1 (HT1B) or D74-45 (HT1B) - Body ground

Always

10 kΩ or higher

D31-3 (OX1B) or D74-114 (OX1B) - Body ground

Always

10 kΩ or higher

D32-1 (HT2B) or D74-44 (HT2B) - Body ground

Always

10 kΩ or higher

D32-3 (OX2B) or D74-112 (OX2B) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

REPLACE HEATED OXYGEN SENSOR

(a) Replace the heated oxygen sensor

.

HINT:

Perform "Inspection After Repair" after replacing the heated oxygen sensor

.

10.

PERFORM CONFIRMATION DRIVING PATTERN

(a) Refer to the confirmation driving pattern for P0136, P0137, P0138, P0156, P0157 and P0158.

11.

CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158)

(a) Connect the Techstream to the DLC3.

(b) Turn the Techstream on.

(c) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

(d) Input DTC: P0136, P0137, P0138, P0156, P0157 or P0158.

(e) Check the DTC Monitor is NORMAL. If DTC Monitor is INCOMPLETE, perform the driving pattern adding the vehicle

speed.

Result

DISPLAY (DTC OUTPUT)

PROCEED TO

NORMAL

A

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139...