Mitsubishi L200. Manual - part 815

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-19

C-171

RV meter <vehicles with RV 
meter>

C-219

ETACS-ECU

C-308

Steering wheel sensor 
<vehicles with ASTC>

Connector No.

Connector name

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-20

CAN BUS DIAGNOSIS

Diagnosis Item 1: Diagnose shorts in the power supply to CAN bus line

CAUTION

When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water 
pipe. If you fail to do, a component connected to the CAN bus line may be broken.

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White 
Y : Yellow     SB : Sky blue     BR : Brown     O : Orange     GR : Grey 
R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

A/T-ECU

DIAGNOSIS 
CONNECTOR

ENGINE-ECU

STEERING 
WHEEL 
SENSOR

G AND 
YAW RATE 
SENSOR

A/C-ECU

ABS-ECU

ASTC-ECU

ETACS-ECU

RV METER

NOTE

:VEHICLES WITH ABS
:VEHICLES WITH ASTC
:VEHICLES WITH RV METER
:VEHICLES WITH AUTOMATIC-A/C
:LHD
:RHD
:A/T

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-21

FUNCTION
When diagnosing the CAN bus lines, the M.U.T.-III 
measures the voltage of CAN_H and CAN_L line and 
detects the short to power supply or earth.

TROUBLE JUDGEMENT CONDITIONS
The M.U.T.-III judges the trouble when it is impossi-
ble to receive the periodically sent data and the volt-
age of CAN_H or CAN_L line is more than 4.0 V.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-22

TROUBLESHOOTING HINTS

• Malfunction of the wiring harness

• Short to power supply of the connector

• Malfunction of each ECU