Toyota Tundra (2015 year). Manual — part 1236
PROBLEM SYMPTOM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
Abnormal A/F learning value
Air fuel ratio sensor
Deviation from fuel injection
characteristics
Fuel injector assembly
Wet-fouled or dry-fouled
spark plug
Spark plug
Fuel pump
Fuel pump control system
(2) Systems to inspect.
TROUBLESHOOTING BY
SYSTEM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
Fuel system
troubleshooting A
Abnormal A/F learning value
Fuel injector assembly
86 to 93
94 to 101
Rough idling
Crankshaft position sensor
Abnormal fuel pressure
Fuel
Fuel leak from fuel line
Fuel pump
Pressure regulator
Fuel system
troubleshooting B
Purge VSV system
Fuel injector assembly
102 to 104
Fuel system
troubleshooting C
Injection signal system
malfunction
Fuel injector assembly
Crankshaft position sensor
VVT sensor
ECM
73 to 76
Intake system
troubleshooting
Difference between ISC target
value and opening angle when
idling
Engine assembly (compression
loss)
Valve timing
Engine coolant temperature
sensor
ECM
83 to 85
105 to 107
Ignition system
troubleshooting
Camshaft and/or crankshaft
position sensor signal malfunction
Crankshaft position sensor
system (including sensor
installation)
VVT sensor system (including
sensor installation)
ECM
77 to 82
108 to 113
PROCEDURE
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
A
1.
CHECK ANY OTHER DTCS OUTPUT AND RECORD FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(d) Read the DTCs and record the Freeze Frame Data.
HINT:
RESULT
PROCEED TO
Only DTC P1604 is output
A
DTCs other than P1604 are output
B
B
GO TO DTC CHART
2.
CHECK ENGINE IMMOBILISER SYSTEM
(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 / Immobiliser Fuel Cut.
(e) Read the value displayed on the Techstream.
OK:
Immobiliser Fuel Cut is OFF
HINT:
OK
A
NG
REPAIR ENGINE IMMOBILISER SYSTEM
3.
CHECK MALFUNCTION CONDITION
(a) Confirm the problem symptoms.
Result
RESULT
PROCEED
TO
Freeze frame data exists, but the starting difficulty cannot be reproduced and it is unknown what kind of
starting difficulty occurred
A
The problem symptoms can be reproduced, or the malfunction conditions are known
B
B
GO TO STEP 25
4.
CHECK 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
.
FREEZE FRAME DATA ITEM
SUSPECTED AREA
PROCEED
TO
ENGINE SPEED
BATTERY VOLTAGE
Minimum voltage is
less than 5 V
Battery fully depleted
A
Minimum voltage is
5 V or higher
Starter malfunction
Crankshaft position
sensor system
Excess engine friction
Immobiliser system
ECM
B
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
FREEZE FRAME DATA ITEM
SUSPECTED AREA
PROCEED
TO
ENGINE SPEED
BATTERY VOLTAGE
60 to 250 rpm (engine cranks but no initial
combustion)
-
Fuel pump control
system
Ignition system
Engine coolant
temperature sensor
Immobiliser system
Fuel injection system
C
250 rpm or higher (combustion occurs but initial
combustion and starter turnoff occur late)
-
Engine assembly
Fuel injection system
Fuel pump control
system
D
HINT:
When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame
Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E.
*2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is
ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the
following freeze frame data items.
Immobiliser Fuel Cut
Engine Speed (Starter Off)
Shift SW Status (R, D Range)
B
GO TO STEP 5
C
GO TO STEP 10
D
GO TO STEP 15
E
GO TO STEP 49
A
CHARGE OR REPLACE BATTERY
5.
CHECK 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
.
FREEZE FRAME
DATA ITEM
RESULT
SUSPECTED AREA
PROCEED
TO
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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