Toyota Tundra (2015 year). Manual — part 1147

OK

NEXT

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly

.

NG

REPLACE EGR VALVE ASSEMBLY

18.

CHECK HARNESS AND CONNECTOR

.

HINT:

Repair any problems.

19.

CHECK WHETHER DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs

.

(e) Turn the ignition switch off.

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

(g) Start the engine and warm it up.

(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(j) Read DTCs.

Result

RESULT

PROCEED TO

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172,...

A

RESULT

PROCEED TO

DTC P0171, P0172, P0174 or P0175 is output

A

DTC is not output

B

B

END

20.

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

(a) Disconnect the mass air flow meter connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D7-3 (VG) - D74-74 (VG)

Always

Below 1 Ω

D7-2 (E2G) - D74-75 (E2G)

Always

Below 1 Ω

D7-3 (VG) or D74-74 (VG) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172,...

OK

NEXT

21.

REPLACE MASS AIR FLOW METER

(a) Replace the mass air flow meter

.

HINT:

.

22.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs

.

(e) Turn the ignition switch off.

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

(g) Start the engine and warm it up.

(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(j) Read DTCs.

Result

RESULT

PROCEED TO

DTC is not output

A

DTC P0171, P0172, P0174 or P0175 is output

B

B

REPLACE ECM

A

END

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172,...

OK

23.

CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - INTEGRATION RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

24.

INSPECT INTEGRATION RELAY (A/F)

(a) Inspect the integration relay (A/F)

.

NG

REPLACE INTEGRATION RELAY

OK

CHECK ECM POWER SOURCE CIRCUIT

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172,...