Part 6

1UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604: Startability Malfunction
P1604 - Startability Malfunction

Continued

110. CHECK INTAKE VALVE

(a) Check if carbon is on the intake valves.

Result:

B -- READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

A -- CLEAN INTAKE VALVE

111. 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, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

Result:

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

112. CHECK CYLINDER COMPRESSION PRESSURE

(a) Inspect the compression Engine.

NG -- REPAIR OR REPLACE ENGINE ASSEMBLY

OK -- ADJUST VALVE TIMING Reassembly

113. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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

NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Service and Repair
OK -- Continue to next step.

114. 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 Service and Repair
OK -- Continue to next step.

115. CHECK CAMSHAFT POSITION SENSOR

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

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

OK:

Sensor is installed correctly.

NG -- SECURELY REINSTALL CAMSHAFT POSITION SENSOR Service and Repair
OK -- Continue to next step.

116. 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 Components
OK -- Continue to next step.

117. 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.

118. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

(a) Disconnect the camshaft 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 camshaft position sensor connector.

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

119. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM)

(a) Disconnect the VVT sensor for intake side 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.

121. CHECK CRANKSHAFT POSITION SENSOR

(a) Replace the crankshaft position sensor Service and Repair.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- CHECK CAMSHAFT POSITION SENSOR

OK -- END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE)

122. CHECK CAMSHAFT POSITION SENSOR

(a) Replace the camshaft position sensor Service and Repair.

(b) Check the engine start operation.

OK:

Malfunction has been repaired successfully.

NG -- CHECK VVT SENSOR

OK -- END (CAMSHAFT POSITION SENSOR WAS DEFECTIVE)

123. CHECK 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)