Mitsubishi Grandis. Manual — part 605

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-518

terminal No.3

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 26 .

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN1) and the
intermediate connector.

STEP 26. Resistance measurement at A-16
intermediate connector and C-112 engine-ECU
<M/T> or engine-A/T-ECU <A/T> 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 engine-ECU <M/T> or

engine-A/T-ECU <A/T> connector 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-16 intermediate connector

terminal No.6 and C-112 engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector terminal

AC310398

AC

Connector: A-16 <RHD>

A-16 (B)

AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

AC312553

Harness side: C-112

Test
harness

AS

Male side: A-16

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-519

No.61.

OK: 2

Ω or less

(5) Continuity between A-16 intermediate connector

terminal No.12 and C-112 engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector terminal
No.62.

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>

Power supply to the engine-ECU <M/T> or
engine-A/T-ECU <A/T> may be suspected.
Diagnose the engine control system. Refer
to

P.13A-321

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between the engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector and the
joint connector (CAN1).

STEP 27. Connector check: A-03 ABS-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

.

Q: Is the check result normal?

YES :

Go to Step 28 .

NO :

Repair the defective connector.

STEP 28. MUT-III CAN bus diagnostics (A-03
ABS-ECU connector disconnected)

(1) Disconnect the ABS-ECU connector, and

diagnose by using the MUT-III.

(2) Check that the MUT-III indications correspond to

the illustration.

Q: Is the check result normal?

AC312553

Harness side: C-112

Test
harness

AT

Test
harness

Male side: A-16

AC310398

AI

Connector: A-03 <RHD>

Harness side

AC310398

AI

Connector: A-03 <RHD>

Harness side

AC309836

MUT

J/C (2)

METER

ETAC S

J/C (1)

ABS-ECU

ENG/AT-ECU

A/C -ECU

C. DISPL AY

SRS-ECU

AK

: Red section

on screen

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-520

YES :

<MUT-III indications correspond to the

illustration> Go to Step 29 .

NO :

<MUT-III indications do not correspond to
the illustration> Go to Step 30 .

STEP 29. Resistance measurement at A-07 joint
connector (CAN1) and A-03 ABS-ECU connector.
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

ABS-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

disconnected.

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

terminal No.2 and A-03 ABS-ECU connector
terminal No.21

OK: 2

Ω or less

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

terminal No.5 and A-03 ABS-ECU connector

AC310398

AI

Connector: A-03 <RHD>

Harness side

AC302572AD

Connector: A-07

Harness side

AC312553

Harness side: A-07

Test
harness

Harness side: A-03

Test
harness

BW

AC312553

Harness side: A-07

Test
harness

BY

Harness side: A-03

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-521

terminal No.23

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>

Power supply to the ABS-ECU may be
suspected. Diagnose the ABS system.
Refer to

P.35B-65

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between the joint connector (CAN1) and the
ABS-ECU connector.

STEP 30. Connector check: C-09 joint connector
(CAN2)

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 31 .

NO :

Repair a defective connector or replace the
joint connector.

STEP 31. Connector check: C-125 intermediate
connector

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

Go to Step 32 .

NO :

Repair the defective connector.

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC

Short pin

AC310628AB

Connector: C-125 <RHD>