Page 2606 - Foton Workshop Manual - Sauvana

62-554 DIAGNOSIS-ENGINE CONTROL SYSTEM

Diagnosis Procedure
Notice：
• Before performing a diagnosis, ensure that the engineECUand the knock 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 knock sensor
related?

fuwx62176

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

2. Check the signal circuit of knock sensor

(a). Ignition switch: LOCK .
(b). Disconnect the battery negative cable.
(c). Disconnect the knock sensor connector E19 and the ECU connector E01
respectively.

Page 2606