Toyota Tundra (2015 year). Manual — part 1227

OK

A

39.

READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were

present when the DTC was stored

.

Result

FREEZE FRAME DATA ITEM

FOR DTC P1605

RESULT

SUSPECTED AREA

PROCEED

TO

Calculate Load

Mass air flow meter

A

AFS Voltage B1S1

AFS Voltage B2S1

Below 3.3 V*2

Air fuel ratio

sensor

Harness and

connector

B

Both freeze frame data items

listed above

Values are other than above

-

C

HINT:

GO TO STEP 43

C

GO TO STEP 46

40.

CHECK MASS AIR FLOW METER

(a) Remove the mass airflow meter.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...

A

OK

RESULT

PROCEED TO

Visible foreign matter is not present

A

Visible foreign matter is present

B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter

.

B

REPLACE MASS AIR FLOW METER

41.

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

(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure

.

HINT:

REPAIR OR REPLACE HARNESS OR CONNECTOR

42.

PERFORM DRIVE TEST

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(c) Idle the engine.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...

OK

DATA LIST

SPECIFIED CONDITION

Calculate Load

Perform "Inspection After Repair" after replacing the mass air flow meter

.

NG

REPLACE MASS AIR FLOW METER

43.

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

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant

temperature stabilizes.

(d) Idle the engine.

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

for A/F Sensor.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...

A

OK

(f) Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel

injection volume.

Standard:

TECHSTREAM DISPLAY

SPECIFIED CONDITION

Control the Injection Volume for A/F Sensor (+12.5%)

Air fuel ratio sensor output voltage is below 3.1 V

Control the Injection Volume for A/F Sensor (-12.5%)

Air fuel ratio sensor output voltage is higher than 3.4 V

Result

RESULT

PROCEED TO

Abnormal

A

Normal

B

HINT:

B

GO TO STEP 46

44.

CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE)

(a) Check the harnesses and connectors, referring to DTC P0031 inspection procedure

.

HINT:

REPAIR AIR FUEL RATIO SENSOR POWER SOURCE

CIRCUIT

45.

CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

(a) Check the harnesses and connectors, referring to DTC P2237 inspection procedure

.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...