Page 478 - Foton Workshop Manual - Auman EST-M

DI - 424 Diagnosis - Mechanical fault diagnosis

Failure phenomenon Possible reason Failure elimination

Check the engine oil level Verify if the engine oil
Engine oil level higher than specification
scale caliberation and oil sump capacity is correct

Engine oil not meeting the specification
Replace the engine oil or filter
of working condition
Check the caliberation of wheel resolution
counter and odometer If necessary, caliberate or
Caliberation error for wheel revolution
replace the wheel resolution counter or odometer.
counter or odometer
Use a new mileage to calculate the fuel
consumption

Verify if the ECM caliberation is correct Check
Electric control module (ECM)
the caliberation revision history to correctly
caliberation failure
recover the caliberation stored in ECM

Auxiliary device utilizing the fuel in the Check the fuel consumption rate of auxiliary
fuel tank device
When evaluating the fuel consumption, it is
Equipment and environment factor necessary to consider the environment
impacting fuel consumption rate temperature, wind, tyre model, shaft alignment,
driving route and pneumatic auxillary device
Fuel consumption too much
Check if the vehicle brake drags, and he gear-box
Overloaded fails. Check the cooling fan circulation time and
the driving device of engine

The drive system and engine are not Check if the gear driving device and driving
matched correctly system parts fail
Intake manifold (boost) pressure sensor
Check the boosting pressure sensor and circuit
or circuit failed

Speed sensor or other circuit failure Check the sensor and circuit

Check if the speed sensor and its circuit fail and
Speed sensor interfered
if necessary, perform service

Check if the fuel pipe, fuel joint and fuel filter
Fuel leaking
leak Check the fuel pipe to the fuel tank

Check if the intake system and exhaust system
Intake or exhaust leaking
leak
Air-air cooler blocked or leaking Check if the air-air cooler is blocked or leaks

Intake system resistance exceeding Check the intake system resistance. Clean or
technical specification replace the air filter and intake if necessary

DI-424