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 How to Proceed With Troubleshooting.
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 Freeze Frame Data.
HINT
Record or print DTCs and freeze frame data, if necessary.
NEXT -- Continue to next step.
5. CLEAR DTC AND FREEZE FRAME DATA*
(a) Clear DTCs and freeze frame data Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
6. CONDUCT VISUAL INSPECTION
NEXT -- Continue to next step.
7. SELECT CHECK MODE DIAGNOSIS*
(a) Switch the ECM from normal mode to check mode.
HINT
Refer to Check Mode Procedure Check Mode Procedure.
NEXT -- Continue to next step.
8. CONFIRM PROBLEM SYMPTOMS
(a) Confirm problem symptoms.
HINT
* Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.
* If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.
Result
B -- GO TO STEP 10
A -- Continue to next step.
9. SIMULATE SYMPTOMS
HINT
Refer to Symptom Simulation How To Proceed With Troubleshooting.
NEXT -- Continue to next step.
10. CHECK DTC*
(a) Check for DTCs.
HINT
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 -- 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) Check the ECM power source circuit.
HINT
Refer to ECM Power Source Circuit ECM Power Source Circuit.
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) Check for intermittent problems.
HINT
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