2NZ-FE ENGINE CONTROL  SFI SYSTEM  BASIC INSPECTION  


CAUTION / NOTICE / HINT

When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following procedure, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when troubleshooting the engine.

PROCEDURE

1.CHECK BATTERY VOLTAGE
NOTICE:

Carry out this check with the engine stopped and the ignition switch off.


Result:
Result Proceed to
11 V or higher OK
Below 11 V NG



OK

2.CHECK WHETHER ENGINE CRANKS

NG

CHARGE OR REPLACE BATTERY

2.CHECK WHETHER ENGINE CRANKS
Result:
Proceed to
OK
NG



OK

3.CHECK WHETHER ENGINE STARTS

NG

PROCEED TO PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>PROBLEM SYMPTOMS TABLE


3.CHECK WHETHER ENGINE STARTS
Result:
Proceed to
OK
NG



OK

4.CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

NG

6.CHECK FUEL PRESSURE
4.CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
a.

Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.


Result:
Proceed to
OK
NG



OK

5.CHECK IDLING SPEED

NG

REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

5.CHECK IDLING SPEED
a.

Check the engine idling speed.

Click hereEngine / Hybrid System>2NZ-FE ENGINE MECHANICAL>ENGINE>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

6.CHECK FUEL PRESSURE

NG

TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP

6.CHECK FUEL PRESSURE
a.

Check the fuel pressure.

Click hereEngine / Hybrid System>2NZ-FE FUEL>FUEL SYSTEM>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

7.CHECK FOR SPARK

NG

TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP

7.CHECK FOR SPARK
a.

Perform a spark test.

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>IGNITION SYSTEM>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

PROCEED TO PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>PROBLEM SYMPTOMS TABLE


NG

TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP