Page 1007 - Workshop Manual - Tunland (2017)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-321

PTO OR CRUISE CONTROL DOES NOT WORK 04

Fault phenomenon Diagnosis logic Possible reasons
• Vehicle speed sensor • Vehicle speed sensor fault
• Clutch switch • Clutch switch fault
PTO or cruise control does • Brake switch • Brake switch fault
not work • Cruise control /PTO • Cruise control /PTO
selector switch selector switch fault
• ECM • ECM fault

Diagnosis Procedure

1 . Check the engine data
(a) Ignition switch: OFF.
(b) Connect the diagnosis tool with the fault diagnosis connector (16 pins) on the lower
left of the dashboard.
(c) Ignition switch: ON, and start the diagnostic tool.
(d) Read the motor data shown on the diagnostic tool.
Check whether the data flow is normal or not.

YES>To step 2.
No >Maintenance related faults.

2 . Check speed sensors and wire harness

(a) Check whether speed sensors and wire harness are damaged.
Is the inspection result normal?

YES>To step 3.
No >Maintenance related faults.

3 . Check clutch switch and the wire harness

(a) Check whether clutch switch and the wire harness are damaged.
Is the inspection result normal?
YES>To step 4.

No >Maintenance related faults.

4 . Check brake switch and the wire harness
(a) Check whether brake switch and the wire harness are damaged.

Is the inspection result normal?

YES>To step 5.
No >Maintenance related faults.

5 . Check speed sensors and wire harness
(a) Check whether speed sensors and wire harness are damaged.