Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 14

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–11

ES

HOW TO PROCEED WITH 
TROUBLESHOOTING

HINT:
*: Use the intelligent tester.

NEXT

NEXT

HINT:
If the display indicates a communication fault in the tester, 
inspect the DLC3.

NEXT

HINT:
Record or print DTCs and freeze frame data, if necessary.

NEXT

NEXT

NEXT

NEXT

HINT:
If the engine does not start, perform steps 10 and 12 first.

1

VEHICLE BROUGHT TO WORKSHOP

2

CUSTOMER PROBLEM ANALYSIS

3

CONNECT INTELLIGENT TESTER TO DLC3*

4

CHECK DTC AND FREEZE FRAME DATA*

5

CLEAR DTC AND FREEZE FRAME DATA*

6

CONDUCT VISUAL INSPECTION

7

SET CHECK MODE DIAGNOSIS*

8

CONFIRM PROBLEM SYMPTOMS

ES–12

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

B

A

NEXT

B

A

NEXT

B

A

B

A

Result

Proceed To

Malfunction does not occur

A

Malfunction occurs

B

GO TO STEP 10

9

SIMULATE SYMPTOMS

10

CHECK DTC*

Result

Proceed To

Malfunction code

A

No code

B

GO TO STEP 12

11

REFER TO DTC CHART

12

CONDUCT BASIC INSPECTION

Result

Proceed To

Malfunctioning parts not confirmed

A

Malfunctioning parts confirmed

B

GO TO STEP 17

13

REFER TO PROBLEM SYMPTOMS TABLE

Result

Proceed To

Malfunctioning circuit confirmed

A

Malfunctioning parts confirmed

B

GO TO STEP 17

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–13

ES

NEXT

B

A

NEXT

NEXT

NEXT

NEXT

NEXT

14

CHECK ECM POWER SOURCE CIRCUIT

15

CONDUCT CIRCUIT INSPECTION

Result

Proceed To

Malfunction not confirmed

A

Malfunction confirmed

B

GO TO STEP 18

16

CHECK FOR INTERMITTENT PROBLEMS

17

CONDUCT PARTS INSPECTION

18

IDENTIFY PROBLEM

19

ADJUST AND/OR REPAIR

20

CONDUCT CONFIRMATION TEST

END

ES–14

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

CHECK FOR INTERMITTENT 
PROBLEMS

HINT:
Intelligent tester only:
Inspect the vehicle's ECM using check mode. Intermittent 
problems are easier to detect with an intelligent tester when 
the ECM is in check mode. In check mode, the ECM uses 
1trip detection logic, which is more sensitive to malfunctions 
than normal mode (default), which uses 2trip detection logic.
1. Clear DTCs (See page 

ES-38

).

2. Switch the ECM from normal mode to check mode using 

an intelligent tester (See page 

ES-42

).

3. Perform a simulation test.
4. Check and wiggle the harness(es), connector(s) and 

terminal(s).