Toyota Tundra (2015 year). Manual — part 1222
A
HINT:
In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more.
a.
In the freeze frame data, the engine speed at #5 is 120 rpm or less.
b.
GO TO STEP 38
C
GO TO STEP 52
D
GO TO STEP 67
E
GO TO STEP 72
5.
CHECK INTAKE SYSTEM
(a) Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets,
etc.]
.
HINT:
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
OK
OK
If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the
vacuum inside the intake pipes increases and the air suction noise becomes louder.
If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is
small) and almost the same as the normal values when racing the engine (the intake air volume is high),
air leakage may be present.
OK:
There is no air leakage.
NG
REPAIR OR REPLACE INTAKE SYSTEM
6.
CHECK PURGE VSV
(b) Start the engine.
(c) Idle the engine.
OK:
Air does not flow.
HINT:
When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear
DTCs
.
NG
REPLACE PURGE VSV
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
A
7.
READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were
present when the DTC was stored
.
Result
FREEZE FRAME DATA ITEM FOR
DTC P1605
RESULT
SUSPECTED AREA
PROCEED
TO
Stop Light Switch
Air suction from brake
booster
A
-
B
B
GO TO STEP 10
8.
READ VALUE USING TECHSTREAM (SHORT FT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
OK
OK
(d) Idle the engine.
Standard:
Short FT #1 and Short FT #2 changes by +10% or less.
HINT:
When air leakage from the brake booster is present, the feedback compensation increases because the
air-fuel ratio becomes lean.
NG
INSPECT BRAKE BOOSTER ASSEMBLY
9.
PERFORM DRIVE TEST
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.
(c) Idle the engine.
DATA LIST
CONDITION
SPECIFIED
CONDITION
Short FT #1 + Long
FT #1
-15 to +15%
Short FT #2 + Long
FT #2
-15 to +15%
NG
INSPECT BRAKE BOOSTER ASSEMBLY
10.
CHECK IGNITION SYSTEM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
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