Mitsubishi Grandis. Manual - part 10

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-37

Step 8. Connector check: C-221 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the defective connector.

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

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Harness side

C-221(GR)

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

AC

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Harness side

C-221(GR)

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-38

Step 9. Check the wiring harness from C-221 
ETACS-ECU connector terminal Nos.59 and 68 to 
C-301 column switch connector terminal Nos.3 
and 2.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-01, and repair if necessary.

• Check the communication lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the wiring harness.

Step 10. Check whether the diagnosis code is 
reset.

Replace the column switch, and then check that the 
diagnosis code is not reset.
(1) Replace the column switch.
(2) Ignition switch: ON
(3) On completion, check that diagnosis code No.02 

is not reset.

Q: Is diagnosis code No.02 set?

YES : 

Replace the ETACS-ECU.

NO : 

The procedure is complete.

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

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55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

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74

Harness side

C-221(GR)

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

AC

51

52

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55

56

57

58

59

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61

62

63

64

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66

67

68

69

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72

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74

Harness side

C-221(GR)

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side

AC310613

AE

Connector: C-01 <LHD>

AC310631AE

Connector: C-01 <RHD>

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-39

Diagnosis code No.03 Communication error with front-ECU

CAUTION

If diagnosis code No.03 is set in the ETACS-ECU, 
diagnose the CAN bus lines.

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-40

TROUBLE JUDGMENT

The ETACS-ECU communicates with the front-ECU 
through the SWS communication line. If there is any 
trouble in that communication, diagnosis code No.03 

will be set.

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

IGNITION
SWITCH (IG2)

DIAGNOSIS
CONNECTOR

ETACS-ECU

POWER
SOURCE

FRONT-ECU

26

FUSIBLE
LINK

RELAY
BOX

FRONT SIDE

Front-ECU Power Supply and SWS Communication Circuit