Toyota Tundra (2015 year). Manual — part 1278
data from the time the malfunction occurred.
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.
CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE - ECM)
(a) Disconnect the air switching valve connector.
(b) Disconnect the ECM connectors.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
D58-3 (AIP) - A24-54 (AIP)
Always
Below 1 Ω
D58-2 (VC) - D74-67 (VCV1)
Always
Below 1 Ω
D58-4 (E2) - D74-98 (E2)
Always
Below 1 Ω
D59-3 (AIP2) - A24-53 (AIP2)
Always
Below 1 Ω
D59-2 (VC2) - D74-67 (VCV1)
Always
Below 1 Ω
D59-4 (E22) - D74-98 (E2)
Always
Below 1 Ω
D58-3 (AIP) or A24-54 (AIP) -
Body ground
Always
10 kΩ or higher
D58-2 (VC) or D74-67 (VCV1) -
Body ground
Always
10 kΩ or higher
D59-3 (AIP2) or A24-53 (AIP2) -
Body ground
Always
10 kΩ or higher
D59-2 (VC2) or D74-67 (VCV1) -
Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
OK
2.
INSPECT AIR SWITCHING VALVE ASSEMBLY (PRESSURE SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Air pump pressure (Absolute)
and Air Pump2 Pressure (Absolute).
(e) Check the pressure displayed on the Techstream.
Standard pressure:
45 to 135 kPa
HINT:
The Techstream displays the air pump pressure as absolute pressure.
Result
RESULT
PROCEED TO
OK
A
NG (for Bank 1)
B
NG (for Bank 2)
C
B
REPLACE AIR SWITCHING VALVE ASSEMBLY (FOR
BANK 1)
C
REPLACE AIR SWITCHING VALVE ASSEMBLY (FOR
BANK 2)
A
REPLACE ECM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000013HC054X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443; Secondary Air Injection System
Switching Valve Stuck Open Bank1; 2015 MY Tundra [08/2014 - ]
DTC
P2440
Secondary Air Injection System Switching Valve Stuck Open Bank1
DTC
P2441
Secondary Air Injection System Switching Valve Stuck Close Bank1
DTC
P2442
Secondary Air Injection System Switching Valve Stuck Open Bank 2
DTC
P2443
Secondary Air Injection System Switching Valve Stuck Closed Bank 2
DESCRIPTION
Refer to DTC P0412
.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P2440
Cumulative pressure pulsation is 60 kPa (450 mmHg) or more for
2 seconds (1 trip detection logic).
Air switching valve
(ASV) assembly
Open or short in ASV
circuit
Secondary air injection
system piping
Pressure sensor
Pressure sensor circuit
Air injection control
driver (AID)
ECM
The air switching valve (for bank 1) is stuck open for 7 seconds
while the engine is running (2 trip detection logic).
P2441
The air switching valve (for bank 1) is stuck close for 7 seconds
while the engine is running (2 trip detection logic).
Air switching valve
(ASV) assembly
Open or short in ASV
circuit
Vacuum hose (ASV -
pressure sensor)
Secondary air injection
system piping
Pressure sensor
Pressure sensor circuit
Air injection control
driver (AID)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
ECM
P2442
Cumulative pressure pulsation is 60 kPa (450 mmHg) or more for
2 seconds (1 trip detection logic).
Air switching valve
(ASV) assembly
Open or short in ASV
circuit
Secondary air injection
system piping
Pressure sensor
Pressure sensor circuit
Air injection control
driver (AID)
ECM
The air switching valve (for bank 2) is stuck open for 7 seconds
while the engine is running (2 trip detection logic).
P2443
The air switching valve (for bank 2) is stuck close for 7 seconds
while the engine is running (2 trip detection logic).
Air switching valve
(ASV) assembly
Open or short in ASV
circuit
Vacuum hose (ASV -
pressure sensor)
Secondary air injection
system piping
Pressure sensor
Pressure sensor circuit
Air injection control
driver (AID)
ECM
HINT:
Air switching valve normal operation:
When the Air Switching Valve (ASV) is open, exhaust gas pulsation occurs in the secondary air passage.
When the ASV is closed, exhaust gas pulsation does not occur in the secondary air passage.
MONITOR DESCRIPTION
The ECM monitors the pressure in the secondary air passage using the pressure sensor connected to the ASV of
the Secondary Air Injection (AIR) system.
Exhaust gas pulsation is detected by the pressure sensor despite the ECM commanding the ASV to
close.
Exhaust gas pulsation is not detected by the pressure sensor despite the ECM commanding the ASV to
open.
MONITOR STRATEGY
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст