Part 4

1UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605: Engine Stall History
P1605 - Rough Idling

Continued

51. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)

(a) Disconnect the ignition coil connectors.

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

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

Standard Voltage:





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.
- A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
(d) Reconnect the ignition coil connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY)
OK -- Continue to next step.

52. 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) Check whether the fuel pump (for low pressure) operating sound occurs when performing the Active Test on the Techstream.

Specified Condition:





Result:





HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
- If the fuel pump (for low pressure) operating noise is abnormal, proceed to step 53.
B -- CHECK FUEL SYSTEM
A -- Continue to next step.

53. INSPECT FUEL PUMP (FOR LOW PRESSURE)

(a) Disconnect the fuel pump (for low pressure) connector.





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

Standard Resistance:





(c) Reconnect the fuel pump (for low pressure) connector.

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

OK -- CHECK FUEL PUMP CONTROL SYSTEM (FOR LOW PRESSURE)

54. CHECK FUEL SYSTEM

(a) Check for foreign matter such as iron particles around the fuel pump (for low pressure) (fuel pump, fuel pump filter, inside the fuel tank), and for signs that the fuel pump (for low pressure) was stuck.

Result:





B -- REPLACE MALFUNCTIONING PARTS

A -- REPAIR OR REPLACE FUEL SYSTEM (FOR LOW PRESSURE)

55. REPLACE MALFUNCTIONING PARTS

(a) If the malfunction could not be identified in steps 3 to 22, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.





(b) If the malfunction could not be identified in steps 23 to 32, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.





(c) If the malfunction could not be identified in steps 33 to 40, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.





(d) If the malfunction could not be identified in steps 41 to 47, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.





(e) If the malfunction could not be identified in steps 48 to 54, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.





HINT
Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.

NEXT -- Continue to next step.

56. CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear.

NEXT -- Continue to next step.

57. PERFORM CONFIRMATION DRIVING PATTERN

(a) Check if engine stall symptoms are present.

HINT
If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK -- END