Mitsubishi Grandis. Manual — part 614

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-554

disconnected.

(4) Continuity between C-125 intermediate

connector terminal No.26 and C-09 joint
connector (CAN2) terminal No.4

OK: 2

Ω or less

(5) Continuity between C-125 intermediate

connector terminal No.27 and C-09 joint
connector (CAN2) terminal No.15

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the voltages measure 2

Ω or less> Go

to Step 3 .

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN2) and the
intermediate connector.

STEP 3. Connector check: A-07 joint connector
(CAN1)
NOTE: When checking A-07 joint connector (CAN1),
disassemble and check the engine compartment
relay box by referring to

P.54D-616

.

CAUTION

The strand end of the twist wire should be within
10 cm from the connector. For details refer to

P.54D-8

.

When checking the joint connector, ensure that its
wiring harness side is not damaged.

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair a defective connector or replace the
joint connector (front wiring harness
assembly).

AC312553

AC312553 AM

Harness side: C-09

Test
harness

Female side: C-125

Test harness

AC312553

AC312553 AO

Harness side: C-09

Test
harness

Female side: C-125

Test harness

AC302572AD

Connector: A-07

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-555

STEP 4. Resistance measurement at C-125
intermediate connector and A-07 joint connector
(CAN1).
NOTE: When checking A-07 joint connector (CAN1),
disassemble and check the engine compartment
relay box by referring to

P.54D-616

.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

CAUTION

The test wiring harness should be used. For
details refer to

P.54D-8

.

(1) Disconnect the joint connector (CAN1) and the

intermediate connector, and measure at the
wiring harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

disconnected.

(4) Continuity between A-07 joint connector (CAN1)

terminal No.1 and C-125 intermediate connector
terminal No.27

OK: 2

Ω or less

(5) Continuity between A-07 joint connector (CAN1)

terminal No.4 and C-125 intermediate connector

AC302572AD

Connector: A-07

Harness side

AC310613

AD

Connector: C-125 <LHD>

AC312553

Male side: C-125

Test harness

AV

Harness side: A-07

Test
harness

AC312553 AU

Male side: C-125

Test harness

Harness side: A-07

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-556

terminal No.26

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the resistances measure 2

Ω or less>

Follow diagnostic item 23 "Diagnose the
lines from the main bus line to the
engine-ECU <M/T> or engine-A/T-ECU
<A/T>" (Refer to

P.54D-562

), diagnostic

item 24 "Diagnose the lines between CAN
main bus line and the ABS-ECU (Refer to

P.54D-567

), or diagnostic item 25

"Diagnose the lines between CAN main bus
line and the ASC-ECU" (Refer to

P.54D-571

).

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN1) and the
intermediate connector.

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-557

Diagnostic Item 22: Diagnose the lines between the joint connectors (CAN1 and CAN2) <RH drive
vehicles>

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.

TROUBLE JUDGMENT

If the MUT-III cannot receive any signal from the
ABS-ECU and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, CAN bus line connector(s)
are broken or an open circuit has occurred.

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

COMBINATION
METER

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