Page 378 - Foton Workshop Manual - Tunland (AT)

04-232 DIAGNOSTICS - ENGINE CONTROL SYSTEM

No >Maintenance related faults.

3 . Check battery

(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Use a special instrument to check whether the battery is normal.
04
Is the inspection result normal?

YES>To step 4.
NO> Replace the battery.

4 . Check the fuse related to ignition switch system

(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Check whether the fuse related to ignition switch system is normal.

Is the inspection result normal?
YES>To step 5.

NO>Replace the fuse.

5 . Check ignition switch and the wire harness
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Disconnect ignition switch connector C006.
(d) Check whether the ignition switch harness is normal.

Is the inspection result normal?
YES>To step 6.
No >Maintenance related faults.

6 . Replace ignition switch
(a) Replace ignition switch.
(b) Use a diagnostic apparatus to perform DTC verification procedures.
(c) Implement the steps to read sensor data stream.
(d) Check whether DTC exists.
Is the inspection result normal?

YES>Replace ignition switch.
NO >To step 7.

7 . Replace ECM

(a) Replace ECM.
(b) Use a diagnostic apparatus to perform DTC verification procedures.
(c) Implement the steps to read sensor data stream.
(d) Verify that no DTC exists and the data are normal.

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