Toyota Tundra (2015 year). Manual — part 1507
Monitor runs whenever following DTCs not stored
None
Battery voltage
10.5 V or more
Time after heater ON
5 seconds or more
Active heater OFF control
Not operating
Active heater ON control
Not operating
Heater output duty
More than 0%
P101D and P103D
Monitor runs whenever following DTCs not stored
None
Battery voltage
10.5 V or more
Heater output duty cycle
Less than 60%
Active heater OFF control
Not operating
Active heater ON control
Not operating
Air fuel ratio sensor heater range check low current failure (P0031, P0051)
Not detected
TYPICAL MALFUNCTION THRESHOLDS
P0031 and P0051
A/F sensor heater current
Less than 0.8 A
P0032 and P0052
Command to heater output
ON
Heater current detected by heater monitor IC
14 A or more
P101D and P103D
Heater OFF current
More than 11 A
Heater current detected by heater monitor IC
14 A or more
COMPONENT OPERATING RANGE
A/F sensor heater current
0.9 to 9.9 A
CONFIRMATION DRIVING PATTERN
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P003...
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 DTC.
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, P0052, P101D or P103D.
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-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P003...
OK
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [E] again.
14.
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.
15.
WIRING DIAGRAM
Refer to DTC P2195
.
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.
PROCEDURE
1.
INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)
(a) Disconnect the D33 or D34 Air-Fuel Ratio (A/F) sensor
connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
1 (HA1A) - 2 (+B)
20°C (68°F)
1.6 to 3.2 Ω
1 (HA1A) - 4 (A1A-)
Always
10 kΩ or higher
1 (HA2A) - 2 (+B)
20°C (68°F)
1.6 to 3.2 Ω
1 (HA2A) - 4 (A2A-)
Always
10 kΩ or higher
NG
REPLACE AIR FUEL RATIO SENSOR
2.
CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P003...
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 the table below.
Standard resistance:
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P003...
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