Toyota Tundra (2015 year). Manual — part 1659
A
(6) Start the engine after the Techstream initialization is
finished.
(7) Perform the AIR system intrusive operation while the
engine is idling.
(8) Check that the air-fuel ratio and pressure in the
secondary air injection system passage (PULSATION)
displayed on the Techstream indicate the conditions
shown in the table below.
(9) Turn the ignition switch off.
OK:
AIR SYSTEM
OPERATION
PULSATION
CONDITION
(ECM
CALCULATION)
AIR-FUEL RATIO
(REFERENCE)
AIR PUMP: ON,
ASV: OPEN
10 kPa or more
18 or more
AIR PUMP: OFF,
ASV: CLOSE
Less than 30 kPa
Approximately 14.5
(around stoichiometric
air-fuel ratio)
Reference:
If the air pump operation is confirmed as normal
, the air-fuel
the air pump operates.
Result
RESULT
PROCEED TO
NG
A
OK
B
B
GO TO STEP 17
10.
INSPECT AIR TUBE (BLOCKAGES AND LEAKAGES)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
OK
OK
(a) Check that the No. 2 and No. 3 air tubes are securely
connected to both the exhaust manifold and the ASV.
(b) Inspect the air tube for blockages and damage.
OK:
No blockages and damage on intake pipe.
NG
REPLACE AIR TUBE
11.
INSPECT AIR SWITCHING VALVE ASSEMBLY
(a) Inspect the air switching valve assembly
.
NG
REPLACE AIR SWITCHING VALVE ASSEMBLY
12.
INSPECT AIR INJECTION CONTROL DRIVER (POWER SOURCE OF AIR INJECTION
CONTROL DRIVER)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
OK
(a) Disconnect the D48 and D50 or D52 and D54 AID
connectors.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED CONDITION
D48-1 (BATT) - Body
ground
Ignition switch
ON
11 to 14 V (near battery
voltage)
D50-5 (+B) - Body
ground
Ignition switch
ON
11 to 14 V (near battery
voltage)
D52-1 (BAT2) - Body
ground
Ignition switch
ON
11 to 14 V (near battery
voltage)
D54-5 (+B2) - Body
ground
Ignition switch
ON
11 to 14 V (near battery
voltage)
(d) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D50-1 (E) - Body ground
Always
Below 1 Ω
D54-1 (E2) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE AIR INJECTION CONTROL
DRIVER POWER SOURCE CIRCUIT
13.
CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
OK
(a) Disconnect the A24 or D74 ECM 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
D74-28 (AIRV) - D50-3 (SIV)
Always
Below 1 Ω
A24-43 (ARV2) - D54-3 (SIV2)
Always
Below 1 Ω
D74-28 (AIRV) or D50-3 (SIV) - body ground
Always
10 kΩ or higher
A24-43 (ARV2) or D54-3 (SIV2) - body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
14.
PERFORM ACTIVE TEST USING TECHSTREAM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P244...
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