Page 129 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 75

Diagnosis procedure IN
Caution

●Before the following steps are executed, ensure that the connection between the ECM and the injector DI
is well connected.
● Before performing electrical diagnosis and test, refer to the schematic wiring diagram and EG
components information

● Before measuring, check if the pins of connector are broken, loose or corroded. Make sure the pins in TR
good contact.

● The checking methods of fuel injectors are the same, and give fuel injector 1 for reference.
AX
1. Read the DTC and data on the diagnosis instrument

a. Start the engine to run at idle
FR
b. Use the diagnosis instrument to perform DTC confirmation procedure

c. Use the diagnosis instrument to read the sensor data stream
ST
d. Use the diagnosis instrument to read the fuel injector data stream.
Check if the result is ok? BR
Yes>intermittent failure
NO>go to Step 2. BW

2. Check the resistance of fuel injector.
a. Ignition switch: LOCK. EL

b. Disconnect the cable of battery negative pole
c. Disconnect the injector connector 1 connector A016.

d. Measure the resistance between socket pins 2 and 3 of
fuel injector connector 1.
Standard resistance:
Multimeter connection Standard value

A016(2)-A016(3) 11.4~12.6Ω

Check if the result is ok?

Yes>go to Step 3.

No> Replace the fuel injector.

3. Check the harness between fuel injector 1 and engine ECM.

a. Ignition switch: LOCK.

b. Disconnect the cable of battery negative pole.

c. Separately disconnect the injector connector A016 and ECM connector A001.

DI-075