Changan M201 2014, Wiring Diagram, Page: 12 / 258

1.1.3-2
M201 2014.01
1.1.3-2 Circuit Fault Diagnosis
2. Self-powered Test Lamp and Ohmmeter
Use test lamp with own 12 V power supply or
ohmmeter to inspect the circuit for continuity.
Test lamp comprises a bulb, battery and a pair
of wiring harnesses. The bulb will be lit when
the two wiring harnesses are connected.
Before testing, disconnect the negative
battery cable and pull out the fuse of the
circuit. To test the circuit for continuity,
connect two wiring harnesses to the two
measurement points. If the bulb is lit, it means
the circuit is normal.
Warning: DO NOT use self-powered test
lamp to inspect the control module.
Otherwise, it could damage the interior
circuit inside the control module. Please
use a ohmmeter with 10 M
Ω or higher
internal resistance.
Ohmmeter has the same usage method as
voltmeter, but ohmmeter can show the
resistance value. The lower resistance, the
better continuity.
3. Jumper Wire with Fuse
Use jumper wire to test a broken point for
open loop circuit (circuit open). The jumper
wire is a tool that should be in tandem with
the circuit.
Warning: To protect the circuit to be
inspected, DO NOT use the fuse higher
than the rated capacity of circuit to
inspect relevant circuits. DO NOT use the
jumper wire as the input or output signal
when a control module such as ECM or
TCM is in the circuit. Otherwise it could
damage the circuit interior inside the
control module.
Fault Testing
1. Voltage Testing
Voltage testing is to test the voltage at a
certain point. When testing a certain
connector terminal, insert the positive probe
into the wiring harness from the connector
back without assembling wiring harness
connector.
M1103002
5A
M1103003
Test Lamp
Solenoid
Switch
5A
+B
0.5RD
I/P Fuse and
Relay Box
Voltmeter
0.5G
2 E00
1 E00
1 C00
M1103004