Mitsubishi Grandis. Manual — part 602

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-506

STEP 6. MUT-III CAN bus diagnostics (C-02
combination meter connector disconnected)

(1) Disconnect the combination meter 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?

YES :

<MUT-III indications correspond to the

illustration> Go to Step 7 .

NO :

<MUT-III indications do not correspond to
the illustration> Go to Step 8 .

STEP 7. Resistance measurement at C-09 joint
connector (CAN2) and C-02 combination meter
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

combination meter 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

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

AC309836

MUT

J/C (2)

METER

ETAC S

J/C (1)

ABS-ECU

ENG/AT-ECU

A/C -ECU

C. DISPL AY

SRS-ECU

AI

: Red section

on screen

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-507

disconnected.

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

terminal No.6 and C-02 combination meter
connector terminal No.24

OK: 2

Ω or less

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

terminal No.17 and C-02 combination meter

connector 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 combination meter may
be suspected. Diagnose the combination
meter. Refer to

P.54A-55

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN2) and the
combination meter connector.

STEP 8. Connector check: C-106 A/C-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 9 .

NO :

Repair the defective connector.

STEP 9. MUT-III CAN bus diagnostics (C-106
A/C-ECU connector disconnected)

(1) Disconnect the A/C-ECU connector, and

AC312553 AJ

Harness side: C-09

Test
harness

Harness side: C-02

Test
harness

AC312553 AL

Harness side: C-09

Harness side: C-02

Test
harness

Test
harness

AC310631AB

Connectors: C-106 <RHD>

Harness side

AC310631AB

Connectors: C-106 <RHD>

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-508

diagnose by using the MUT-III.

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

the illustration.

Q: Is the check result normal?

YES :

<MUT-III indications correspond to the

illustration> Go to Step 10 .

NO :

<MUT-III indications do not correspond to
the illustration> Go to Step 11 .

STEP 10. Resistance measurement at C-09 joint
connector (CAN2) and C-106 A/C-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

A/C-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 C-09 joint connector (CAN2)

terminal No.8 and C-106 A/C-ECU connector

AC309836

MUT

J/C (2)

METER

ETAC S

J/C (1)

ABS-ECU

ENG/AT-ECU

A/C -ECU

C. DISPL AY

SRS-ECU

AM

: Red section

on screen

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310631AB

Connectors: C-106 <RHD>

Harness side

AC312553

Harness side: C-106

Test
harness

BB

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-509

terminal No.8

OK: 2

Ω or less

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

terminal No.19 and C-106 A/C-ECU connector
terminal No.9

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 A/C-ECU may be
suspected. Diagnose the air conditioner
system. Refer to

P.55-174

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between the joint connector (CAN2) and the
A/C-ECU connector.

STEP 11. Connector check: 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

.

Q: Is the check result normal?

YES :

Go to Step 12 .

NO :

Repair the defective connector.

STEP 12. MUT-III CAN bus diagnostics (C-221
ETACS-ECU connector disconnected)

(1) Disconnect the ETACS-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-106

Test
harness

BD

Harness side: C-09

Test
harness

AC310620

Connector: C-221

Junction block
(Rear view)

<RHD>

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)

AC310620

Connector: C-221

Junction block
(Rear view)

<RHD>

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)

AC309836

MUT

J/C (2)

METER

ETAC S

J/C (1)

ABS-ECU

ENG/AT-ECU

A/C -ECU

C. DISPL AY

SRS-ECU

AL

: Red section

on screen