How to Proceed with Troubleshooting

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS

NEXT -- Continue to next step.

3. CONNECT TECHSTREAM TO DLC3*

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

When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

NEXT -- Continue to next step.

4. CHECK DTC AND FREEZE FRAME DATA*

(a) Check DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Check Freeze Frame Data Reading and Clearing Diagnostic Trouble Codes.

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

NEXT -- Continue to next step.

5. CLEAR DTC AND FREEZE FRAME DATA*

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

(a) Clear DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Clear Freeze Frame Data Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

6. CONDUCT VISUAL INSPECTION

NEXT -- Continue to next step.

7. SET CHECK MODE DIAGNOSIS*

(a) Refer to Check Mode Procedure Check Mode Procedure.

NEXT -- Continue to next step.

8. CONFIRM PROBLEM SYMPTOMS

(a) Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.

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

Result





B -- GO TO STEP 10
A -- Continue to next step.

9. SIMULATE SYMPTOMS

NEXT -- Continue to next step.

10. CHECK DTC*

(a) Refer to DTC Check / Clear Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO STEP 12
A -- Continue to next step.

11. REFER TO DTC CHART

(a) Refer to Diagnostic Trouble Code Chart SFI System.

NEXT -- GO TO STEP 14

12. CONDUCT BASIC INSPECTION

(a) Refer to Basic Inspection Basic Inspection.

Result





B -- GO TO STEP 17
A -- Continue to next step.

13. REFER TO PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.

Result





B -- GO TO STEP 17
A -- Continue to next step.

14. CHECK ECM POWER SOURCE CIRCUIT

(a) Refer to ECM Power Source Circuit Component Tests and General Diagnostics.

NEXT -- Continue to next step.

15. CONDUCT CIRCUIT INSPECTION*

Result





B -- GO TO STEP 18
A -- Continue to next step.

16. CHECK FOR INTERMITTENT PROBLEMS

(a) Refer to Check for Intermittent Problems Check for Intermittent Problems.

NEXT -- GO TO STEP 18

17. CONDUCT PARTS INSPECTION

NEXT -- Continue to next step.

18. IDENTIFY PROBLEM

NEXT -- Continue to next step.

19. ADJUST AND/OR REPAIR

NEXT -- Continue to next step.

20. CONDUCT CONFIRMATION TEST*

NEXT -- END