Toyota Tundra (2015 year). Manual — part 1556
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0412,P0415...
INSPECTION PROCEDURE
HINT:
By using the Techstream to perform the Secondary Air Injection Check operation in the System Check,
the air-fuel ratio and the pressure in the secondary air injection system passage can be checked while
the secondary air injection system is operating. This helps technicians to troubleshoot the system when
it malfunctions.
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.
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.
PROCEDURE
1.
INSPECT AIR SWITCHING VALVE ASSEMBLY
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0412,P0415...
A
OK
(a) Inspect the air switching valve assembly (for bank 1)
.
(b) Inspect the air switching valve assembly (for bank 2)
.
Result
RESULT
PROCEED TO
OK
A
NG
B
B
REPLACE AIR SWITCHING VALVE ASSEMBLY
2.
CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE ASSEMBLY - BODY
GROUND)
(a) Disconnect the D58 or D59 ASV connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D58-1 (GND) - Body ground
Always
Below 1 Ω
D59-1 (GNDL) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE ASSEMBLY - AIR
INJECTION CONTROL DRIVER)
(a) Disconnect the D58 or D59 ASV connector.
(b) Disconnect the D50 or D54 AID connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D58-5 (+B) - D50-6 (VV)
Always
Below 1 Ω
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0412,P0415...
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D59-5 (+BL) - D54-6 (VV2)
Always
Below 1 Ω
D58-5 (+B) or D50-6 (VV) - Body ground
Always
10 kΩ or higher
D59-5 (+BL) or D54-6 (VV2) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE AIR INJECTION CONTROL DRIVER
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0412,P0415...
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