Page 2594 - Foton Workshop Manual - Sauvana

62-542 DIAGNOSIS-ENGINE CONTROL SYSTEM

Diagnosis Procedure
Notice：
• Before performing the diagnosis, make sure that the engineECUand the intake pressure/
temperature sensor are connected properly.
• Before performing a diagnosis and testing, refer to circuit diagrams and component
information.
• Before performing the test, check whether the connector pins are ruptured, loosened or
corroded, to ensure proper contact of pin.
• If the connection is good, check the signal voltage of the sensor as moving the connector
and wiring harness. If a fault occurs, the corresponding voltage value display will
changeon the diagnostic tool.

1. DTC Test

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

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

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.

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