Toyota Tundra (2015 year). Manual — part 1235
(2) All engine speeds recorded in the freeze frame data are between 100 and 250 rpm (the engine cranks but
there is no combustion).
HINT:
If the engine speed is between 100 and 250 rpm (no initial combustion), there may be a wiring problem or a
high or low and the engine may not be able to be started.
(3) The engine speed recorded in the freeze frame data is 250 rpm or higher (the initial combustion and starter
turnoff timing is too late).
HINT:
If the engine speed is 250 rpm or higher (combustion occurs but the initial combustion and starter turnoff timing
high or low and engine starting trouble may occur.
If Long FT is incorrect, there may be a fuel supply problem due to the injectors or fuel pump being
clogged, etc.
If the engine cranking speed is too high, compression loss may have occurred due to carbon
interfering with the valve operation.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
(b) When the malfunction (starting difficulty) can be reproduced, or malfunction conditions are known, perform the
following inspections ("Problem symptoms" and "Systems to inspect")
(1) Problem symptoms
The engine does not crank.
HINT:
The starter is normal if a noise that indicates the starter pinion gear is extending is heard. The
battery may be fully depleted or there may be excess engine friction.
1.
The engine cranking speed is abnormal.
HINT:
If the engine cranking speed is too high (for example, 300 rpm or higher with no combustion),
compression loss may have occurred because carbon interfered with valve operation, etc.
2.
There is no initial combustion.
HINT:
If there is no initial combustion, there is probably a wiring problem or an ignition or fuel
system part malfunction.
3.
The engine stalls after starter turnoff.
HINT:
If the engine stalls after starter turnoff, the air-fuel ratio may be incorrect or the VVT may
have a problem returning.
4.
The initial combustion and starter turnoff occur late.
5.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
HINT:
If the initial combustion and starter turnoff occur late, the fuel injection volume is probably
incorrect (too low or too high).
HINT:
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 assembly
Immobiliser system
Crankshaft position
sensor
ECM
4 to 9
100 to 250 rpm (engine cranks but no initial
combustion*1)
Fuel pump control
system
Ignition 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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
PROBLEM SYMPTOM
SUSPECTED AREA
SUSPECTED COMPONENT
PROCEDURE
The engine does not crank
Battery malfunction
Battery fully depleted
26 to 31
Starting system
Starter assembly (includes pinion
gear wear or tooth damage)
Starting system
Immobiliser system
Immobiliser system
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 48
Ignition system malfunction
Spark plug
Crankshaft position sensor
Ignition coil assembly
Engine stalls after starter
turnoff
Air suction
Intake system connections
49 to 57
Deposits in throttle with
motor body assembly
Throttle with motor body assembly
VVT valve does not return
properly
Camshaft timing oil control valve
assembly
Mass air flow meter
malfunction
Mass air flow meter
EGR valve does not close
properly
EGR valve assembly
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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст