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.
NEXT -- Continue to next step.
4. CHECK DTC AND FREEZE FRAME DATA*
HINT
Record or print DTCs and freeze frame data, if necessary.
(a) Check DTC DTC Check / Clear.
(b) Check Freeze Frame Data Freeze Frame Data.
NEXT -- Continue to next step.
5. CLEAR DTC AND FREEZE FRAME DATA*
(a) Clear DTC DTC Check / Clear.
(b) Clear Freeze Frame Data Freeze Frame Data.
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) Confirm problem symptoms.
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 DTC Check / Clear.
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 -- Continue to next step.
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 -- Continue to next step.
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