TROUBLE DIAGNOSIS — INTRODUCTION; Work Flow
EF & EC-7051flowchartWork Flow
CG10, CGA3
Trouble Diagnosis Work Flow
1
CHECK IN
2
STEP I — CHECK INCIDENT CONDITIONS. Listen to customer complaints. (Get symptoms.)
3
STEP II — CHECK DTC AND FREEZE FRAME DATA. Check and PRINT OUT (write down) (1st trip) Diagnostic Trouble Code (DTC) and Freeze Frame Data (Pre-check). Then clear. Paste it in repair order sheet. If DTC is not available even if MI lights up, check ECM fail-safe. *5 Also check related service bulletins for information. *3
No symptoms, except MI lights up, or (1st trip) DTC exists at STEP II.
return to step 6
Symptoms collected
4
STEP III — Verify the symptom by driving in the condition the customer described. *1
Normal Code (at STEP II)
return to step 6
Malfunction Code (at STEP II)
5
STEP IV — INCIDENT CONFIRMATION. Verify the DTC by performing the "DTC CONFIRMATION PROCEDURE". *1
6
STEP V — Choose the appropriate action. *2
Malfunction Code (at STEP II or IV)
return to step 10
Normal Code (at both STEP II and IV)
7
BASIC INSPECTION
8
SYMPTOM BASIS (at STEP I or III)
9
Perform inspections according to Symptom Matrix Chart.
10
TROUBLE DIAGNOSIS FOR DTC PXXXX. *4
11
REPAIR/REPLACE (STEP VI)
12
STEP VII — FINAL CHECK. Confirm that the incident is completely fixed by performing BASIC INSPECTION and DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE (or OVERALL FUNCTION CHECK). Then, erase the unnecessary (already fixed) (1st trip) DTCs in ECM.
NG
return to step 6
OK
13
CHECK OUT — If completion of SRT is needed, drive vehicle under the specific pattern. *6
NOTE
*1: If the incident cannot be duplicated, refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
*2: If the on board diagnostic system cannot be performed, check main power supply and ground circuit. Refer to "TROUBLE DIAGNOSIS FOR POWER SUPPLY", EC-7071.
*3: If time data of "SELF-DIAG RESULTS" is other than "0" or "1" refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT", EC-7070.
*4: If the malfunctioning part cannot be found, refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
*5: EC-7055
*6: EC-7032
See also
EC-7032 · EC-7055 · EC-7070 · EC-7071