Page 26 - Foton Workshop Manual - Sauvana

01-20 INTRODUCTION - HOW TO TROUBLESHOOT THE VEHICLE

HOW TO PERFORM TROUBLESHOOTING

NOTICE:
• Only the basest operating procedure is simply listed here.
• Please perform troubleshooting in accordance with the operating procedure described in
the following.
• Before performing any maintenance operation, be sure to determine the troubleshooting
procedure of relevant circuit.

1. Fault vehicle entering factory
2. Analyzing fault described by customer
(a). Inquiry the customer about the conditions and the environment when the incident
occurred.
3. Fault symptom confirmation and dtc (including data flow) detection
(a). Measure the battery voltage.
Voltage: 11-14 V (Engine is in off state)
(b). Visual check whether harness, connector and fuse are open circuit or short circuit.
(c). Start engine and warm it up to normal operating temperature.
(d). Confirm fault symptom and setting conditions, and detect DTC.
Is DTC detected?
Yes> Go to Step 4.
No> Go to Step 5.
4. Inquiry DTC list
(a). Check DTC obtained in Step 3, inquiry DTC list, and formulate checking procedure
for system or parts according to "Fault Position".
Directly go to Step 6.
5. Inquiry fault symptom table
(a). Check fault symptom obtained in Step 3, inquiry Fault Symptom Table, and
formulate checking procedure for system or parts according to "Suspected Position".
6. Circuit and parts detection
(a). Check the system circuit or parts that may have fault which are obtained in Step 4
and Step 5.
(b). Confirm fault circuit or parts.
7. Maintenance
(a). Adjust, repair or replace fault circuit or parts.
8. Confirmatory test
(a). After completing maintenance, always confirm whether fault is eliminated.
(b). If fault does not appear again, you still shall simulate the vehicle and environment
conditions when the fault firstly occurred and perform confirmatory test.
9. Completion

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