Page 622 - Foton Workshop Manual - Sauvana

12C-182 ENGINE MECHANICAL SYSTEM - ELECTRIC SYSTEM

FAULT DIAGNOSIS

1. Common faulted parts related to the failure of sparking of the spark plug
(a). Common faulted parts
• Fuse
• Fuse burnout
• Spark plug
• Ignition coil
• Ignition coil circuit
• Engine control unit (ECU)

2. Common diagnosis flow of failure of sparking of spark plug

Results of
No. Diagnosis steps Subsequent steps
inspection

Replace the relevant
Check whether relevant fuses are Yes
1 fuses
abnormal.
No Next step
Check whether relevant fuse circuits are Yes Repair or replace
2
abnormal. No Next step

Check whether the spark plug is Yes Replace the spark plug
3
abnormal. No Next step

Replace the ignition
Check whether the ignition coil is Yes
4 coil
abnormal.
No Next step

Check whether the ignition coil circuit is Yes Repair or replace
5
abnormal. No Next step

Replace the engine
Check whether the engine control unit Yes control unit
6
(ECU) works abnormally. ECU
No Retest

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