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