Mitsubishi Colt Ralliart. Manual — part 306

AC313936

AC313936AJ

Harness side: B-01

Test
harness

Test
harness

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-53

(5) Resistance between B-01 joint connector (CAN2)

terminal Nos.9 and 10

OK: 120

± 20 Ω

AC313936

AC313936

AC313936AI

Test
harness

Test
harness

Harness side: B-01

(6) Resistance between B-01 joint connector (CAN2)

terminal Nos.2 and 4

OK: 1 k

Ω or more

AC313936

AC313936AL

Harness side: B-01

Test
harness

Test
harness

(7) Resistance between B-01 joint connector (CAN2)

terminal Nos.8 and 11

OK: 1 k

Ω or more

Q: Is the check result normal?

YES <all of the measurement results are within the
normal value> :

Repair the wiring harness

between joint connector (CAN2) and
intermediate connector (B-40).

NO <The resistance between terminal Nos.1 and 5
is less than 1 k

Ω> :

Go to Step 11.

NO <The resistance between terminal Nos.2 and 4
is less than 1 k

Ω> :

Go to Step 9.

NO <The resistance between terminal Nos.8 and 11
is less than 1 k

Ω> :

Go to Step 10.

NO <The resistance between terminal Nos.9 and 10
is less than 120

± 20 Ω> :

Go to Step 8.

STEP 8. Resistance measurement at A-08
engine-ECU <M/T> or engine-CVT-ECU <CVT>
connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

.

AC509191

Connector: A-08

Harness side

AD

A-08 (GR)

(1) Remove the engine-ECU <M/T> or

engine-CVT-ECU <CVT>, and measure at the
equipment side.

AC204738

AC204738FT

Equipment side: A-08

Test
harness

Test
harness

(2) Resistance at A-08 engine-ECU <M/T> or

engine-CVT-ECU <CVT> connector terminal
Nos.105 and 106

OK: 120

± 20 Ω

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-54

Q: Is the check result normal?

YES :

<Within 120

± 20 Ω> Repair the wiring

harness between joint connector (CAN2)
and engine-ECU <M/T> or
engine-CVT-ECU <CVT> connector.

NO :

<Not within 120

± 20 Ω> Check the

engine-ECU <M/T> or engine-CVT-ECU
<CVT> connector, and repair if necessary. If
the engine-ECU <M/T> or engine-CVT-ECU
<CVT> connector is in good condition,
replace the engine-ECU <M/T> or
engine-CVT-ECU <CVT>.

STEP 9. Resistance measurement at A-05
ABS-ECU <vehicles without ASC> or ASC-ECU
<vehicles with ASC> connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

.

AC601294

A-05 (B)

AB

Harness side

<ABS-ECU>

<ASC-ECU>

Connector: A-05

(1) Remove the ABS-ECU <vehicles without ASC>

or ASC-ECU <vehicles with ASC>, and measure
at the equipment side.

AC204738

AC204738FG

Equipment side: A-05

Test
harness

Test
harness

(2) Resistance at A-05 ASC-ECU connector terminal

Nos.1 and 12 <vehicles without ASC>

OK: 1 k

Ω or more

AC204738

AC204738

AC204738

AC204738

AC204738

AC204738NM

Equipment side: A-05

Test
harness

Test
harness

(3) Resistance at A-05 ASC-ECU connector terminal

Nos.38 and 39 <vehicles with ASC>

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Repair the wiring harness

between joint connector (CAN2) and
ABS-ECU <vehicles without ASC> or
ASC-ECU <vehicles with ASC> connector.

NO :

<Less than 1 k

Ω> Check the ABS-ECU

<vehicles without ASC> or ASC-ECU
<vehicles with ASC> connector, and repair if
necessary. If the ABS-ECU <vehicles
without ASC> or ASC-ECU <vehicles with
ASC> connector is in good condition,
replace the ABS-ECU <vehicles without
ASC> or ASC-ECU <vehicles with ASC>.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-55

STEP 10. Resistance measurement at B-37
EPS-ECU connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

.

AC313820

Connector: B-37

AG

B-37 (B)

Harness side

(1) Remove the EPS-ECU, and measure at the

equipment side.

AC204738FO

Equipment side: B-37

Test
harness

Test
harness

(2) Resistance at B-37 EPS-ECU connector terminal

Nos.3 and 8

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Repair the wiring harness

between joint connector (CAN2) and
EPS-ECU connector.

NO :

<Less than 1 k

Ω> Check the EPS-ECU

connector, and repair if necessary. If the
EPS-ECU connector is in good condition,
replace the EPS-ECU.

STEP 11. Resistance measurement at C-43 G and
yaw rate sensor connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

.

AC601064

AB

C-43 (B)

Connector: C-43

Harness side

(1) Remove the G and yaw rate sensor, and

measure at the equipment side.

AC204738

AC204738

AC204738

AC204738

AC204738

AC204738NL

Equipment side: C-45

Test
harness

Test
harness

(2) Resistance at C-43 G and yaw rate sensor

connector terminal Nos.2 and 3

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Repair the wiring harness

between joint connector (CAN2) and G and
yaw rate sensor connector.

NO :

<Less than 1 k

Ω> Check the G and yaw rate

sensor connector, and repair if necessary. If
the G and yaw rate sensor connector is in
good condition, replace the G and yaw rate
sensor.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-56

Diagnostic Item 4: Diagnose the terminator resistors at both ends.

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.

ENGINE-ECU <M/T> OR
ENGINE-CVT-ECU <CVT>

COMBINATION
METER

DIAGNOSIS
CONNECTOR

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

FUNCTION

The resistance in the communication errors condition
cannot be measured by the CAN bus diagnostics,
therefore, judge the terminator resistor only when
receiving the each ECU periodically sent data nor-
mally.

TROUBLE JUDGEMENT CONDITIONS

The M.U.T.-III judges the trouble when the periodi-
cally sent data from each ECU can be received nor-
mally but the resistance value between CAN_H and
CAN_L line is other than from 50 ohms to 70 ohms.

Main

Index

Group

TOC