Mitsubishi Grandis. Manual — part 623

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-590

disconnected.

(4) Continuity between C-37 jumper connector

terminal No.4 and C-07 centre display connector

terminal No.5

OK: 2 ohms or less

(5) Continuity between C-37 jumper connector

terminal No.3 and C-07 centre display connector
terminal No.15

OK: 2 ohms or less

CAUTION

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

P.54D-8

.

Q: Are the check result normal?

YES :

<All the resistances measure 2

Ω or less>

Power supply to the centre display
connector may be suspected. Diagnose the
centre display. Refer to

P.54A-161

.

NO :

<Either or all of the voltages measure more
than 2

Ω> Repair the wiring harness

between the jumper connector and the
centre display connector.

AC312553

Test
harness

Harness side: C-07

Test
harness

Harness side: C-37

BM

AC312553

Harness side: C-07

Test
harness

Test
harness

Harness side: C-37

BN

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-591

Diagnostic Item 30: Diagnose the lines from the main bus line to the ETACS-ECU <LH 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 can not received signal from the
ETACS-ECU, CAN bus line connector(s) are broken
or an open circuit has occurred.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the ETACS-ECU
may be defective.

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

COMBINATION
METER

ETACS-
ECU

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

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-592

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: C-09 joint connector
(CAN2) connector and C-221 ETACS-ECU
connector

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 and its short pins are not
damaged.

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair a defective connector or replace the
joint connector.

STEP 2. Resistance measurement at C-09 joint
connector (CAN2) and C-221 ETACS-ECU
connector.

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 (CAN2) and the

ETACS-ECU 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

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AB

Short pin

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-593

disconnected.

(4) Continuity between C-09 joint connector (CAN2)

terminal No.3 and C-221 ETACS-ECU connector

terminal No.72

OK: 2 ohms or less

(5) Continuity between C-09 joint connector (CAN2)

terminal No.14 and C-221 ETACS-ECU
connector terminal No.73

OK: 2 ohms or less

CAUTION

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

P.54D-8

.

Q: Are the check result normal?

YES :

<All the resistances measure 2

Ω or less>

Power supply to the ETACS-ECU may be
suspected. Diagnose the SWS. Refer to

P.54B-87

.

NO :

<Either or all of the voltages measure more
than 2

Ω> Repair the wiring harness

between the joint connector (CAN2) and the
ETACS-ECU connector.

AC312553 BE

Harness side: C-09

Test
harness

Harness side: C-221

Test
harness

AC312553 BG

Harness side: C-09

Harness side: C-221

Test
harness