Page 2623 - Foton Workshop Manual - Sauvana

DIAGNOSIS-ENGINE CONTROL SYSTEM 62-571

1. DTC Test

(a). Ignition switch: LOCK。
(b). Connect vehicle diagnostic device.
(c). Ignition switch: ON。
(d). Using the diagnostic tool reads the fault 62
code.
(e). Is there a fault codes associated with the
exhaustVVTvalve?

fuwx62176

Is the inspection result normal?
YES>There is an intermittent fault.
No > To step 2.

2. Check the terminal and connector

(a). Many failures in electrical systems are caused by poor wiring harnesses
of connector and terminals, and may be caused by interference from other
electricalsystems, mechanical or chemical damage.
(b). Thoroughly inspect the connectors of loose, poorly connection, bent, corrosion,
contamination, deterioration or damage.
(c). Repair or replace as necessary, then inspect the vehicles.

Is the inspection result normal?
YES>To step 3。
No >Maintenance related faults.

3. Check the mechanical failure of exhaustVVTvalue.

(a). Checkthe operation status of VVTphase regulator and engine oil control valve (dirt
blockage, sticking, engine oil pressure without full pressure relief,locking dowel
failure, etc.).
(b). Check whether the relative mounting positions of crankshaft and exhaust camshaft
are correct.
(c). Check whether there is fault in the transmission gear and belts and so on between
the crankshaft and exhaust camshaft.

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