Toyota Tundra (2015 year). Manual — part 1883
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine and idle it for 5 minutes or more [B].
6.
7.
Idle the engine for 5 minutes or more [D].
8.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
9.
Read the Pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
10.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11.
Input the DTC: P0031, P0032, P0051 or P0052.
12.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
13.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032...
OK
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [E] again.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
14.
WIRING DIAGRAM
Refer to DTC P2195
.
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection
procedure.
HINT:
Read freeze frame data using the Techstream. Freeze frame data records the engine condition 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.
Change the fuel injection volume using the Control the Injection Volume function provided in the Active
Test and monitor the air fuel ratio sensor output voltage
. If the sensor output voltage does not
change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
PROCEDURE
1.
INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)
(a) Inspect the air fuel ratio sensor
.
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor
.
NG
REPLACE AIR FUEL RATIO SENSOR
2.
CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032...
A
(a) Disconnect the D33 or D34 A/F sensor connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
D33-2 (+B) - Body
ground
Ignition switch ON
11 to 14 V
D34-2 (+B) - Body
ground
Ignition switch ON
11 to 14 V
Result
RESULT
PROCEED TO
NG
A
OK
B
B
GO TO STEP 5
3.
INSPECT INTEGRATION RELAY (A/F)
(a) Remove the integration relay from the engine room
relay block
.
(b) Inspect the A/F fuse.
(1) Remove the A/F fuse from the integration relay.
(2) Measure the resistance according to the value(s) in
the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A/F fuse
Always
Below 1 Ω
(3) Reinstall the A/F fuse.
(c) Inspect the integration relay (A/F).
(1) Measure the resistance according to the value(s) in
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032...
OK
the table below.
Standard resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
1C-1 - 1A-4
When no battery voltage
applied to terminals 1A-2 and
1A-3
10 kΩ or higher
When battery voltage applied
to terminals 1A-2 and 1A-3
Below 1 Ω
NG
REPLACE INTEGRATION RELAY (A/F)
4.
CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - A/F SENSOR AND
BODY GROUND)
(a) Disconnect the D33 or D34 A/F sensor connector.
(b) Remove the integration relay from the engine room relay block
.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D33-2 (+B) - 1A-4
Always
Below 1 Ω
D34-2 (+B) - 1A-4
Always
Below 1 Ω
1A-2 - 1B-5
Always
Below 1 Ω
1A-3 - Body ground
Always
Below 1 Ω
D33-2 (+B) or 1A-4 - Body ground
Always
10 kΩ or higher
D34-2 (+B) or 1A-4 - Body ground
Always
10 kΩ or higher
1A-2 or 1B-5 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK ECM POWER SOURCE CIRCUIT
5.
CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
(a) Disconnect the D33 or D34 A/F sensor connector.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032...
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