Page 2598 - Foton Workshop Manual - Sauvana

62-546 DIAGNOSIS-ENGINE CONTROL SYSTEM

Diagnosis Procedure
Notice：
• Before performing the diagnosis, ensure that the engineECUand the coolant 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 the diagnostic device.
(c). Ignition switch: ON .
(d). Using the diagnostic tool reads the fault
code.
(e). Is there a fault code of coolant temperature
sensor related?

fuwx62176

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

2. Read the data from the diagnostic tool

(a). Ignition switch: LOCK .
(b). Connect the pin1and2of coolant temperature sensor connectorE18 .
(c). Ignition switch: ON。
(d). Read the coolant temperature value displayed on the diagnostic instrument.
Test results :

Diagnostic testing Standard value

Temperature Approx 130° C

Page 2598