Toyota Tundra (2015 year). Manual — part 1986
malfunction.
When 2 to 3 minutes have elapsed after stopping the engine: Fuel pressure loss due to the
pressure regulator failing to maintain the fuel pressure.
When 15 to 120 minutes have elapsed after stopping the engine: Problem with injector fuel
seal.
When a long time has elapsed after stopping the engine: Pressure regulator is stuck open.
(2) Systems to inspect.
Intake system
1.
Ignition system
2.
Fuel system
3.
2. INSPECTION FLOW
(a) Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction
conditions are unknown.
FREEZE FRAME
DATA ITEM
RESULT
SUSPECTED AREA
PROCEDURE
Engine Speed
0 rpm (no engine cranking at all)
Battery fully depleted
Engine assembly
(excess friction)
Starter
Crankshaft position
sensor
ECM
4 to 9
100 to 250 rpm (engine cranks but no initial
combustion*1)
Fuel pump control
system
Ignition system
Immobiliser system
Engine coolant
temperature sensor
Fuel injection system
10 to 14
250 rpm or higher (combustion occurs but initial
combustion and starter turnoff*2 occur late)
Engine assembly
(compression loss)
Fuel injection system
Fuel pump control
system
15 to 23
HINT:
*1: First combustion after cranking begins.
*2: Condition when engine speed increases and starter can be turned off.
(b) When the malfunction (starting difficulty) can be reproduced, or when malfunction conditions are known.
(1) Problem symptoms
PROBLEM SYMPTOM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
The engine does not crank
Battery malfunction
Battery fully depleted
26 to 31
Starting system
Starter (includes pinion gear wear
or tooth damage)
Starting system
Immobiliser system
Immobiliser system
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
PROBLEM SYMPTOM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
Engine assembly
Engine assembly (excess friction)
Drive plate wear or tooth damage
Cranking speed too low
Battery malfunction
Battery fully depleted
32 to 34
Starting system
Starter
Engine assembly
Engine assembly (excess friction)
Cranking speed too high
Engine assembly
Engine assembly (compression
loss)
There is no initial
combustion
Fuel supply problem
Cannot maintain pressure due to
pressure regulator malfunction
Fuel injector leak
Fuel leak from fuel line
Fuel pump control system
Fuel pump
35 to 50
Ignition system malfunction
Spark plug
Crankshaft position sensor
Ignition coil
Engine stalls after starter
turnoff
Air suction
Intake system connections
51 to 57
Deposits in throttle body
Throttle body
VVT valve does not return
properly
Camshaft timing oil control valve
assembly
Mass air flow meter
malfunction
Mass air flow meter
The initial combustion and
starter turnoff occur late
Engine coolant temperature
sensor malfunction
Engine coolant temperature sensor
58 to 71
Mass air flow meter
malfunction
Mass air flow meter
Abnormal A/F learning value
Air fuel ratio sensor
Deviation from fuel injection
characteristics
Fuel injector
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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
TROUBLESHOOTING BY
SYSTEM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
Fuel system
troubleshooting A
Abnormal A/F learning value
Fuel injector
87 to 94
95 to 102
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
103 to 105
Fuel system
troubleshooting C
Injection signal system
malfunction
Fuel injector
Crankshaft position sensor
Camshaft position sensor
ECM
73 to 77
Intake system
troubleshooting
Difference between ISC target
value and opening angle when
idling
Engine assembly (compression
loss)
Valve timing
Engine coolant temperature
sensor
ECM
84 to 86
106 to 108
Ignition system
troubleshooting
Camshaft and/or crankshaft
position sensor signal malfunction
Crankshaft position sensor
system (including sensor
installation)
Camshaft position sensor system
(including sensor installation)
ECM
78 to 82
109 to 114
PROCEDURE
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.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
A
OK
(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 / All Data / Immobiliser Fuel Cut.
(e) Read the value displayed on the Techstream.
OK:
Immobiliser Fuel Cut is OFF
HINT:
REPAIR ENGINE IMMOBILISER SYSTEM
3.
CHECK MALFUNCTION CONDITION
(a) Confirm the problem symptoms.
Result
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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