Toyota Tundra (2015 year). Manual — part 1223
OK
A
(a) Perform ignition system On-vehicle Inspection
.
HINT:
Perform "Inspection After Repair" after repairing or replacing the ignition system
.
NG
REPAIR OR REPLACE MALFUNCTIONING PARTS,
COMPONENT AND AREA
11.
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
3.3 V or higher*2
Air fuel ratio sensor
Wire harness or
connector
B
HINT:
*1: If the mass air flow meter is malfunctioning and incorrectly measures the pressure to be less than the
actual intake manifold pressure, the freeze frame data will show a low engine load value.
*2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio
is lean, the actual air-fuel ratio will become rich and the engine may stall.
B
GO TO STEP 15
12.
CHECK MASS AIR FLOW METER
(a) Remove the mass air flow 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
13.
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
14.
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;...
DATA LIST
SPECIFIED CONDITION
Calculate Load
RESULT
PROCEED TO
Abnormal
A
Normal
B
HINT:
Perform "Inspection After Repair" after replacing the mass air flow meter
.
B
GO TO STEP 18
A
REPLACE MASS AIR FLOW METER
15.
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.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
A
OK
(d) Idle the engine.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume
for A/F Sensor.
(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 18
16.
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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
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