Toyota Tundra (2015 year). Manual — part 1662
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000013HD04LX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P2447; Secondary Air Injection System
Pump Stuck On Bank1; 2015 MY Tundra [08/2014 - ]
DTC
P2444
Secondary Air Injection System Pump Stuck On Bank1
DTC
P2445
Secondary Air Injection System Pump Stuck Off Bank1
DTC
P2446
Secondary Air Injection System Pump Stuck On Bank 2
DTC
P2447
Secondary Air Injection System Pump Stuck Off Bank 2
DESCRIPTION
Refer to P2440
.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P2444
P2446
Secondary air pressure more than 2.4 kPa (18 mmHg)
despite ECM commanding air pump to turn off
(2 trip detection logic)
Short in air pump circuit
Open or short in pressure
sensor circuit
Air switching valve assembly
(Pressure sensor)
Air Injection Control Driver
(AID)
ECM
P2445
P2447
Secondary air pressure less than 2.4 kPa (18 mmHg)
despite ECM commanding air pump to turn on
(2 trip detection logic)
Air pump
Open in air pump circuit
Air injection system piping
Vacuum hose (pressure
sensor - air switching valve)
Air switching valve assembly
(Pressure sensor)
Open or short in pressure
sensor circuit
Air Injection Control Driver
(AID)
ECM
Open or short in air pump
heater circuit
Air pump heater relay (AI
HTR)
MONITOR DESCRIPTION
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the Air
The pressure indicated by the pressure sensor does not reach threshold levels despite the ECM
turning on the air pump.
The pressure indicated by the pressure sensor exceeds threshold levels despite the ECM turning off
the air pump.
MONITOR STRATEGY
Related DTCs
P2444: Air pump stuck ON
P2445: Air pump stuck OFF
P2446: Air pump stuck ON
P2447: Air pump stuck OFF
Required Sensors/Components (Main)
Pressure sensor
Required Sensors/Components (Related)
-
Duration
7 seconds
MIL Operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
All:
Monitor runs whenever
following DTCs not
stored
P0010, P0020 (Camshaft Timing Oil Control Valve)
P0011, P0021 (VVT System - Advance)
P0012, P0022 (VVT System - Retard)
P0016, P0018 (VVT System - Misalignment)
P0013, P0023 (Exhaust Camshaft Timing Oil Control Valve)
P0014, P0024 (Exhaust VVT System - Advance)
P0015, P0025 (Exhaust VVT System - Retard)
P0017, P0019 (Exhaust VVT System - Misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air Fuel Ratio Sensor Heater)
P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196,
P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255,
P2256 (Air Fuel Ratio Sensor)
P0102, P0103 (Mass Air Flow Sensor)
P0112, P0113 (Intake Air Temperature Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position
Sensor)
P0171, P0172, P0174, P0175 (Fuel System)
P0301 - P0308 (Misfire)
P0327, P0328, P0332, P0333, P032C, P032D, P033C, P033D (Knock Sensor)
P0335 (Crankshaft Position Sensor)
P1340 (Camshaft Position Sensor)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
P0340, P0342, P0343, P0345, P0347, P0348 (VVT Sensor)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT Sensor)
P0351 - P0358 (Igniter)
P0451, P0452, P0453 (EVAP System)
P0500, P0722 (Vehicle Speed Sensor)
P106B (Evap. emission control system pressure sensor - Air injection system
pressure sensor correlation)
P2431, P2432, P2433, P2436, P2437, P2438 (Secondary Air Injection System
Pressure Sensor)
P2444, P2446 (AIR pump is stuck on), P2445, P2447 (AIR pump is stuck off)
Battery voltage
11 V or higher
Atmospheric pressure
45 kPa (337.5 mmHg) or more
Engine
Running
AIR monitor during AIR: ON*1
Completed
AIR monitor during AIR: OFF*2
Completed
*1: AIR monitor during AIR: ON
Time after AIR in operation
5 seconds or more
AIR pump
ON
AIR valve
Open
Engine speed
400 to 3550 rpm
Intake air amount
Less than 99 gm/sec
Time after engine start
1 second or more
*2: AIR monitor during AIR: OFF
Time after AIR in operation
10 seconds or more
AIR pump
OFF
AIR valve
Closed
Engine speed
Less than 2800 rpm
AIR monitor during AIR: ON
Completed
Time after engine started
1 second or more
P2445, P2447 (Air flow value)
Battery voltage
11 V or higher
Atmospheric pressure
45 kPa (337.5 mmHg) or more
Engine
Running
AIR monitor during AIR: ON*3
Completed
Following condition are met during AIR ON
(a) or (b)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
(a) Cumulative pressure pulsation
Below 10 kPa
(b) AIR pressure
Below 2.4 kPa
*3: Air flow pattern check condition during AIR monitor during AIR: ON
-
Time after AIR in operation
1 second or more
AIR valve
Open
TYPICAL MALFUNCTION THRESHOLDS
P2444, P2446 (AIR pump is stuck on)
Either condition is met
(a) or (b)
(a) Secondary Air Injection OFF (Condition 1)
Met
(b) Secondary Air Injection OFF (Condition 3)
Met
P2445, P2447 (AIR pump is stuck off)
Either condition is met
(a) or (b)
(a) Secondary Air Injection ON (Condition 2)
Met
(b) Secondary Air Injection ON (Condition 4)
Met
P2445, P2447 (Air flow value)
Cumulative pressure pulsation
(a) or (b)
(a) Air flow value at Bank 1 or Bank 2
140 L/min or less
(b) Air flow value at Bank 1 and Bank 2
140 L/min or less
Secondary Air Injection ON (Condition 1)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
10 kPa or higher
AIR pressure
2.4 kPa or higher
Secondary Air Injection ON (Condition 2)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
10 kPa or higher
AIR pressure
Below 2.4 kPa
Secondary Air Injection ON (Condition 3)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
Below 10 kPa
AIR pressure
2.4 kPa or higher
Secondary Air Injection ON (Condition 4)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
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