Part 5

2UR-GSE ENGINE CONTROL: SFI SYSTEM: P1604: Startability Malfunction
P1604 - Startability Malfunction (Continued)

81. CHECK VVT SENSOR

(a) Check the tightening and installation condition of the VVT sensor bolt.

(b) Check the connection of the VVT sensor connector.

OK:

Sensor is installed correctly.

NG -- SECURELY REINSTALL VVT SENSOR Installation
OK -- Continue to next step.

82. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunction that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.

(d) Reconnect the ECM connector.

(e) Reconnect the VVT sensor for exhaust side connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

86. REPLACE CRANKSHAFT POSITION SENSOR

(a) Replace the crankshaft position sensor Removal.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- REPLACE CAMSHAFT POSITION SENSOR

OK -- END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE)

87. REPLACE CAMSHAFT POSITION SENSOR

(a) Replace the camshaft position sensor Removal.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- REPLACE VVT SENSOR

OK -- END (CAMSHAFT POSITION SENSOR WAS DEFECTIVE)

88. REPLACE VVT SENSOR

(a) Replace the VVT sensor Removal.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- REPLACE ECM Removal

OK -- END (VVT SENSOR WAS DEFECTIVE)

89. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value.

(e) Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches turned off.

Result:

B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
A -- Continue to next step.

90. CHECK CYLINDER COMPRESSION PRESSURE

(a) Inspect the compression On-Vehicle Inspection.

NG -- REPAIR OR REPLACE ENGINE ASSEMBLY

OK -- CHECK VALVE TIMING P0016

91. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

(a) Inspect the engine coolant temperature sensor Testing and Inspection.

NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
OK -- Continue to next step.

92. CHECK FUEL PRESSURE

HINT
For the fuel pressure inspection, refer to the following procedures Fuel System.

(a) Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.

Result:

NG -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)
OK -- Continue to next step.

93. READ VALUE USING TECHSTREAM (LONG FT #1 AND LONG FT #2)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List / Long FT #1 and Long FT #2.

Result:

B -- REPLACE FUEL INJECTOR FOR PORT INJECTION Removal
A -- Continue to next step.

94. PERFORM SIMULATION TEST

(a) Check if the idle speed after starting the engine is currently stable and has always been stable in the past.

Result:

HINT
Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

B -- REPLACE FUEL
A -- Continue to next step.

95. CHECK CRANKSHAFT POSITION SENSOR

(a) Check the tightening and installation condition of the crankshaft position sensor bolt.

(b) Check the connection of the crankshaft position sensor connector.

OK:

Sensor is installed correctly.

NG -- SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Installation
OK -- Continue to next step.

96. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.

(d) Reconnect the ECM connector.

(e) Reconnect the crankshaft position sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

97. REPLACE CRANKSHAFT POSITION SENSOR

(a) Replace the crankshaft position sensor Removal.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- REPLACE ECM Removal

OK -- END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE)

98. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump/Speed.

(e) When performing the Active Test, check for fuel leakage from the fuel pipes.

Result:

HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
- Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

B -- INSPECT FUEL PUMP (FOR LOW PRESSURE)

A -- REPAIR OR REPLACE FUEL LINE

99. INSPECT FUEL PUMP (FOR LOW PRESSURE)

(a) Inspect the fuel pump (for low pressure) Inspection.

NG -- REPLACE FUEL PUMP (FOR LOW PRESSURE) Removal

OK -- REPLACE PRESSURE REGULATOR Removal

100. CHECK FUEL PRESSURE (LOW PRESSURE SIDE)

HINT
For the fuel pressure inspection, refer to the following procedures Fuel System.

(a) Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

Result:

B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)
A -- Continue to next step.