Toyota Tundra (2015 year). Manual — part 1651
TYPICAL ENABLING CONDITIONS
P2237, P2238, P2240 and P2241:
Monitor runs whenever following DTCs
not present
P0016, P0018 (VVT System - Misalignment)
P0017, P0019 (Exhaust VVT System - Misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor
heater)
P0102, P0103 (Mass air flow meter)
P0112, P0113 (Intake air temperature sensor)
P0115, P0117, P0118 (Engine coolant temperature sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135
(Throttle position sensor)
P0125 (Insufficient coolant temperature for closed loop fuel
control)
P0128 (Thermostat)
P0171, P0172, P0174, P0175 (Fuel system)
P0301 - P0308 (Misfire)
P0335 (Crankshaft position sensor)
P1340 (Camshaft position sensor)
P0412, P0415, P0418, P0419, P1613, P1614 (Secondary air
injection system control)
P0451, P0452, P0453 (EVAP system)
P2440 - P2447 (Secondary air injection system)
P0500, P0722 (Vehicle Speed Sensor)
P0505 (IAC valve)
P2239, P2242, P2252, P2253, P2255 and P2256:
Monitor runs whenever following DTCs not present
None
A/F sensor - open circuit between A1A+ and A1A-/A2A+ and A2A-
Battery voltage
11 V or more
Engine
Running
Estimated sensor temperature
450 to 550°C (842 to 1022°F) for P2237 and P2240
A/F sensor - Low impedance
Engine coolant temperature
0°C (0°F) or higher
Estimated sensor temperature
700 to 800°C (1292 to 1472°F) for P2238 and P2241
Fuel cut
Not executed
Other:
Battery voltage
11 V or higher
Ignition switch
ON
Timing after ignition switch is OFF to ON
5 seconds or more
TYPICAL MALFUNCTION THRESHOLDS
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2237-P223...
P2237 and P2240 (A/F Sensor Open Circuit Between A1A+ and A1A-/A2A+ and A2A-)
A/F sensor admittance
Below 0.002 1/Ω
P2238 and P2241 (A/F Sensor Low Impedance)
A/F sensor admittance
Less than 0.0074 1/Ω
P2238 and P2241 (A/F Sensor Short Circuit Between A1A+ and GND/A2A+ and GND)
A1A+/A2A+ terminal voltage
0.5 V or less
P2239 and P2242 (A/F Sensor Short Circuit Between A1A+ and +B/A2A+ and +B)
A1A+/A2A+ terminal voltage
More than 4.5 V
P2252 and P2255 (A/F Sensor Short Circuit Between A1A- and GND/A2A- and GND)
A1A-/A2A- terminal voltage
0.5 V or less
P2253 and P2256 (A/F Sensor Short Circuit Between A1A- and +B/A2A- and +B)
A1A-/A2A- terminal voltage
More than 4.5 V
P2238 and P2241 (A/F Sensor Short Circuit Between A1A+ and A1A-/A2A+ and A2A-)
Difference between A1A+ and A1A-/A2A+ and A2A- terminal voltage
0.1 V or less
CONFIRMATION DRIVING PATTERN
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.
5.
Start the engine and wait 5 minutes.
6.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
7.
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.
8.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
9.
Input the DTC: P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255 or P2256.
10.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
11.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2237-P223...
OK
NEXT
TESTER
DISPLAY
DESCRIPTION
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, idle the engine for 5 minutes and check
the DTC judgment result 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.
12.
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.
CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
2.
REPLACE AIR FUEL RATIO SENSOR
(a) Replace the air fuel ratio sensor
.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2237-P223...
3.
CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Clear DTCs
.
(d) Start the engine.
(e) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving
Pattern.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
(g) Read pending DTCs.
Result
RESULT
PROCEED TO
No DTC is output
A
P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255 or P2256 is output
B
B
REPLACE ECM
A
END
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2237-P223...
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