Page 47 - Foton Workshop Manual - Auman EST-M

Introduction - How to remove the vehicle faults IN - 41

Circuit test IN

For the circuit test related to reading and use methods of this manual, see the table below.
The diagnosis instrument DI
cannot communicate with ECM DTC or fault symptoms
Failure phenomenon list
Failure phenomenon Possible reason Failure elimination
EG
1. Diagnosing interface power ● Overhaul or diagnose the
supply failure interface power supply circuit.

2. ABSECU power supply ● Overhaul ABSECU power Failure phenomenon list
The diagnosis instrument cannot failure supply circuit.
communicate with ABSECU 3. Failure of harness between TR
ABSECU and diagnosis ● Check, repair or replace
relevant harness
instrument
4. ABSECU failure Replace ABSECU
Circuit diagram AX

Battery
FR
Instrument
fuse box

ST
Circuit diagram
Diagnosis interface
In order to distinguish and identify
many wires, the colors of wires are BR
basically expressed with single or
double color for the conveniences of
query.
BW
Green Yellow White

White - black
K line
EL

Diagnosis procedure
1. Check the diagnosis interface fuse
a. Ignition switch: LOCK.
b. Check if the diagnosis interface fuse F21 in the fuse box of instrument
panel is broken Diagnosis procedure
If the fuse is Including the title, instructions and
broken? ace the fuse with the same specification (10A).
Yes>repl judgement of diagnostic procedures.
NO>go to Step 2.
2. Check the diagnosis interface power
supply and grounding circuit
a. Ignition switch: LOCK.

1. Basic inspection

a. Resistance measuring conditions of electric elements.

● Unless otherwise specified, all the resistances shall be measured at ambient temperature of 20℃.

● High temperature will be produced while the vehicle is running. The resistance measured at this temperature

may exceed the specified value, so it must be performed to measure the resistance after the engine is cooled.

IN-041