Page 172 - Foton Workshop Manual - Auman EST-M

DI - 118 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

DTC flash code DTC definition DTC check condition Failed part
● Use a WABCO gear ring
tester to check if it is
● Ignition switch: ON.
The ring gear of left damaged or misses any teeth
● When the wheel speed is
6+4 rear wheel speed sensor is not ● Adjust the clearance of
higher than 10km/h, cannot
correct sensor and gear ring if there
detect the wheel signal
are too much clearances at
the same time
● Ignition switch: ON.
SAEJ1939 short circuit or ● Check CAN
7+1 ● CAN line short to power or
open circuit communication harness
ground
● Ignition switch: ON.
SAEJ1939ERC_ER packet ● Check the wiring harness
7+1 ● Engine communication
timeout corresponding to ECM
timeout

● Ignition switch: ON.
● Check the warning light
7+4 Warning lamp ● Warning light output is not
circuit
loaded or short to ground

● Ignition switch: ON.
● Fuse blown
Power supply to the valves is ● Supply voltage is too low
8+1 ● Power or ground circuit
low or open-circuit transitorily, and the warning
open
light is always on

● Ignition switch: ON.
● If the failure appears
8+3 Internal relay is not turned on ● Internal relay not open and
repeatedly, replace the ECU.
valves not powered

● Ignition switch: ON.
Internal fault, internal relay ● If the failure appears
8+3 ● Internal relay not open and
can not be turned on repeatedly, replace the ECU.
valves not powered

DI-118