Toyota Tundra (2015 year). Manual — part 1531
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000004J8R00HX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P014C-P014F,P015A-P015D; A/F Sensor Slow
Response - Rich to Lean Bank 1 Sensor 1; 2015 MY Tundra [08/2014 - ]
DTC
P014C
A/F Sensor Slow Response - Rich to Lean Bank 1 Sensor 1
DTC
P014D
A/F Sensor Slow Response - Lean to Rich Bank 1 Sensor 1
DTC
P014E
A/F Sensor Slow Response - Rich to Lean Bank 2 Sensor 1
DTC
P014F
A/F Sensor Slow Response - Lean to Rich Bank 2 Sensor 1
DTC
P015A
A/F Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1
DTC
P015B
A/F Sensor Delayed Response - Lean to Rich Bank 1 Sensor 1
DTC
P015C
A/F Sensor Delayed Response - Rich to Lean Bank 2 Sensor 1
DTC
P015D
A/F Sensor Delayed Response - Lean to Rich Bank 2 Sensor 1
DESCRIPTION
HINT:
Refer to DTC P2195
.
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P014C
P014E
The "Rich to Lean response rate deterioration level*" value is
standard or less (2 trip detection logic).
Air fuel ratio sensor
(sensor 1)
Air fuel ratio sensor
(sensor 1) heater
ECM
P014D
P014F
The "Lean to Rich response rate deterioration level*" value is
standard or more (2 trip detection logic).
P015A
P015C
The "Rich to Lean delay level*" value is standard or more (2
trip detection logic).
P015B
P015D
The "Lean to Rich delay level*" value is standard or more (2
trip detection logic).
*: Calculated by ECM based on the air fuel ratio sensor output.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P014C-P014...
MONITOR DESCRIPTION
After the engine is warmed up, the ECM carries out air-fuel ratio feedback control, and maintains the air-fuel
ratio at the theoretical level. In addition, after all the preconditions have been met, active air-fuel ratio control
is carried out for approximately 10 seconds, and during active air-fuel ratio control, the ECM measures the
If the time it takes the air fuel ratio sensor output to change is delayed, DTCs P015A, P015B, P015C and
P015D are stored.
MONITOR STRATEGY
Related DTCs
P014C: Air fuel ratio sensor (bank 1) slow response (rich to lean)
P014D: Air fuel ratio sensor (bank 1) slow response (lean to rich)
P014E: Air fuel ratio sensor (bank 2) slow response (rich to lean)
P014F: Air fuel ratio sensor (bank 2) slow response (lean to rich)
P015A: Air fuel ratio sensor (bank 1) delayed response (rich to
lean)
P015B: Air fuel ratio sensor (bank 1) delayed response (lean to
rich)
P015C: Air fuel ratio sensor (bank 2) delayed response (rich to
lean)
P015D: Air fuel ratio sensor (bank 2) delayed response (lean to
rich)
Required Sensors/Components (Main)
Air fuel ratio sensor
Required Sensors/Components
(Related)
Vehicle speed sensor, crankshaft position sensor
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P014C-P014...
Duration
10 to 15 seconds
MIL Operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs not stored
None
Active air fuel ratio control
Performing
Active air fuel ratio control is performed when the following conditions met
-
Battery voltage
11 V or higher
Engine coolant temperature
75°C (167°F) or higher
Idle
OFF
Engine speed
1000 to 4000 rpm
Air fuel ratio sensor status
Activated
Fuel-cut
OFF
Engine load
10 to 70%
Shift position
2nd or more
Catalyst monitor
Not yet
Mass air flow
2.5 to 11.4 gm/sec
TYPICAL MALFUNCTION THRESHOLDS
Air Fuel Ratio Sensor (Bank 1) Slow Response (Rich to Lean)
Rich to Lean Response rate deterioration level
0.03 V or less
Air Fuel Ratio Sensor (Bank 1) Slow Response (Lean to Rich)
Lean to Rich Response rate deterioration level
-0.035 V or higher
Air Fuel Ratio Sensor (Bank 2) Slow Response (Rich to Lean)
Rich to Lean Response rate deterioration level
0.03 V or less
Air Fuel Ratio Sensor (Bank 2) Slow Response (Lean to Rich)
Lean to Rich Response rate deterioration level
-0.035 V or higher
Air Fuel Ratio Sensor (Bank 1) Delayed Response (Rich to Lean)
Rich to Lean delay level
450 ms or more
Air Fuel Ratio Sensor (Bank 1) Delayed Response (Lean to Rich)
Lean to Rich delay level
450 ms or more
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P014C-P014...
Air Fuel Ratio Sensor (Bank 2) Delayed Response (Rich to Lean)
Rich to Lean delay level
450 ms or more
Air Fuel Ratio Sensor (Bank 2) Delayed Response (Lean to Rich)
Lean to Rich delay level
450 ms or more
MONITOR RESULT
Refer to Checking Monitor Status
.
CONFIRMATION DRIVING PATTERN
HINT:
Performing this confirmation pattern will activate the A/F sensor response monitor.
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON.
2.
Turn the Techstream on.
3.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation)
.
4.
Turn the ignition switch off and wait for at least 30 seconds.
5.
Turn the ignition switch to ON and turn the Techstream on.
6.
Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor /
Details.
7.
Check that the monitor item O2 Sensor is Incomplete.
HINT:
The test values for the test items RL RES RATE B1S1, LR RES RATE B1S1, RL DELAY B1S1,
Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher)
[A].
9.
Drive the vehicle at a constant speed between 75 and 100 km/h (47 and 62 mph) for 10 minutes
[B].
CAUTION:
10.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P014C-P014...
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