Toyota Tundra (2015 year). Manual — part 1973
PROBLEM SYMPTOM
FREEZE FRAME DATA ITEM FOR DTC P1605
SUSPECTED AREA
PROCEED
TO
CLOSED
THROTTLE
POSITION SW
ENGINE
SPEED
TOTAL OF
SHORT FT AND
LONG FT
problem
At least 1 of
the 5 sets of
freeze frame
data is -15% or
less*3
Sensor malfunction (value
from sensor too rich)
B
All 5 sets of
freeze frame
data are from
-15% to +15%
Intake air
volume
insufficient
Ignition timing
incorrect
C
When idling or
decelerating, engine
speed rapidly
decreases and engine
stalls
Decreases
rapidly*1
-
Injection
stoppage,
ignition stoppage
Load from
external parts
D
When accelerating or
driving at constant
speed, engine stalls*4
At least one is
OFF
-
-
Sensor
malfunction
Injection
stoppage,
ignition stoppage
Fuel supply
problem
E
HINT:
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
A
OK
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 65
E
GO TO STEP 70
5.
CHECK AIR INDUCTION SYSTEM
(a) Check for air leakage in the air induction system [vacuum hose disconnection, cracks,
damaged gaskets, etc.]
.
HINT:
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.
Perform "Inspection After Repair" after repairing or replacing the air induction system
.
OK:
There is no air leakage.
NG
REPAIR OR REPLACE INTAKE SYSTEM
6.
CHECK PURGE VSV
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
OK
(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
7.
READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to 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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
A
OK
8.
READ VALUE USING TECHSTREAM (SHORT FT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to 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.
(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:
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;...
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