Content .. 377 378 379 380 ..

Mitsubishi Colt Ralliart. Manual - part 379

DIAGNOSIS TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-24

Diagnosis code No.B1706: Blown fuse is detected in fuse No.31 (hazard fuse).

CAUTION

• If diagnosis code No.B1706 is set in the

ETACS-ECU, diagnose the CAN bus lines.

• Whenever the ECU is replaced, ensure that

the input and output signal circuits are nor-
mal.

TROUBLE JUDGMENT

When junction block fuse No.31 is blown, diagnosis
diagnosis code No.B1706 is set. However, if the sys-
tem returns to normal condition, diagnosis code
No.B1706 will be erased automatically.

COMMENT ON TROUBLE SYMPTOM

Junction block fuse No.31 or the ETACS-ECU may
be defective.

PROBABLE CAUSES

• Malfunction of the Junction block fuse No. 31

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54D

− Diagnosis

P.54D-13

Step 2. Check the Junction block fuse No.31

Q: Is the fuse in good condition?

YES :

Go to Step 3.

NO :

Replace the Junction block fuse No.31, and
then go to Step 6.

Step 3. Connector check: B-134 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

Step 4. Voltage measurement at the B-134
ETACS-ECU connector

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Voltage between B-134 ETACS-ECU connector

terminal No. 5 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 5.

AC313826

Connector: B-134

Junction block side

Junction block (Rear view)

AC313826

Connector: B-134

Junction block side

Junction block (Rear view)

AC310507 FG

Connector B-134
(Junction block side)

Main

Index

Group

TOC

DIAGNOSIS TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-25

Step 5. Check the wiring harness between
B-134ETACS-ECU connector terminal No. 1 to
fusible link (1).

Check the power supply line for open circuit.
NOTE:

Prior to the wiring harness inspection, check junction
block connector B-108 and repair if necessary.

Q: Is the check result normal?

YES : .

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-13

NO : .

Repair the wiring harness.

Step 6. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to the "LOCK" (OFF)

position to "ON" position.

(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES :

If a trouble is solved, it is determined that

there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00

− How to use

Troubleshooting/inspection Service Points

−

How to Cope with Intermittent Malfunction

P.00-13

NO :

Replace the ETACS-ECU.

Diagnosis code No. B1707: Open circuit is detected in the flasher circuit.

CAUTION

• If diagnosis code No.B1707 are set in the

ETACS, diagnose the CAN main bus line.

• Whenever the ECU is replaced, ensure that

the communication circuit is normal.

TROUBLE JUDGMENT

When there is an open circuit between the turn-sig-
nal lamp relay (incorporated in the ETACS-ECU) and
body earth, diagnosis code No. B1707 is set. How-
ever, if the system returns to normal condition, diag-
nosis code No.B1707 will be erased automatically.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors between the
turn-signal lamp relay and body earth may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the ETACS-ECU
may be defective.

PROBABLE CAUSES

• Defective turn-signal lamp bulb

• Defective head lamp assembly

• Defective side turn-signal lamp

• Defective rear combination lamp

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

AC313826

Connector: B-134

Junction block side

Junction block (Rear view)

AC313824 AG

Connector: B-108

Harness side

Junction block (Front view)

B-108 (B)

Main

Index

Group

TOC

DIAGNOSIS TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-26

DIAGNOSIS PROCEDURE

Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54D

− Diagnosis

P.54D-13

). Repair the

CAN bus line.

Step 2. ECU check by using the SWS monitor.
Check that the SWS communication lines are in
good condition.

• Ignition switch: ON

ECU TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU"
menu

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible

P.54C-41

Step 3. M.U.T.-III actuator test
Perform the actuator test for the ETACS-ECU, and
check that the turn-signal lamps work. Refer to

P.54C-14

• Item 09: Turn-signal lamp (LH) switch

• Item 10: Turn-signal lamp (RH) switch

• Item 17: Turn-signal lamp (LH)

• Item 18: Turn-signal lamp (RH)

OK: The turn-signal lamps blink or illumi-
nate.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Refer to Inspection Procedure L-3 "Any of
the turn-signal lamps does not illuminate

P.54C-175

Step 4. Check that the turn-signal lamps operate.
Check that the turn-signal lamps illuminate normally.

Q: Is the check result normal?

YES :

Go to step 5.

NO :

Refer to Inspection Procedure L-3 "Any of
the turn-signal lamps does not illuminate

P.54C-175

Step 5. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to the "LOCK" (OFF)

position to "ON" position.

(3) On completion, check that the diagnosis code is

not reset.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-13

NO :

Replace the ETACS-ECU.

Main

Index

Group

TOC

DIAGNOSIS TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-27

Diagnosis code No. B1708: An open circuit is detected in the variable intermittent wiper control
switch.

CAUTION

• If diagnosis code No.B1708 is set in the

ETACS, diagnose the CAN main bus line.

• Whenever the ECU is replaced, ensure that

the input and output signal circuits are nor-
mal.

TROUBLE JUDGMENT

When the output voltage of the variable intermittent
wiper control switch is 4V or more for 1 second or
more, ETACS-ECU judges that there is an open cir-
cuit in the variable intermittent wiper control switch,
and sets diagnosis code No. B1708.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• The SWS communication line, the column switch

or the ETACS-ECU may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on

connector(s) or wiring harness between the
ETACS-ECU and the column switch. For diagno-
sis procedures, refer to "How to treat past trou-
ble" (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-13

PROBABLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to step 3.

NO :

Repair the CAN bus line (Refer to GROUP
54D, Troubleshooting

P.54D-13

). On

completion, go to Step 2.

Step 2. Retest the system.
Check that the windshield intermittent wiper interval
can be adjusted by operating the windshield intermit-
tent wiper volume control.

OK: The intermittent wiper interval is
changed as the intermittent wiper volume is
rotated.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Refer to Inspection Procedure N-6 "The
windshield wiper volume signal is not
received

P.54C-211

Step 3. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to the "LOCK" (OFF)

position to "ON" position.

(3) On completion, check that the diagnosis code is

not reset.

Q: Is the check result normal?

YES :

Replace the ETACS-ECU.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-13

Main

Index

Group

TOC

Content .. 377 378 379 380 ..