Mitsubishi Grandis. Manual - part 116

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-461

Inspection Procedure Q-12: The hazard warning lamp switch signal is not received.

CAUTION

Whenever the ECU is replaced, ensure that the 
input signal circuit is normal.

ETACS-
ECU

HAZARD
WARNING
LAMP SWITCH

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

Hazard Warning Lamp Switch Input Circuit <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-462

COMMENTS ON TROUBLE SYMPTOM

Input signal from the hazard warning lamp switch is 
used to operate the functions below. If the signal is 
abnormal, these functions will not work normally.

• Keyless entry system (encrypted code 

registration)

• Hazard warning lamp

POSSIBLE CAUSES

• Malfunction of the hazard warning lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Connector check: C-123 hazard warning 
lamp switch connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

ETACS-
ECU

HAZARD
WARNING
LAMP SWITCH

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

Hazard Warning Lamp Switch Input Circuit <RHD>

AC312031

AD

Connector: C-123 <LHD>

Harness side

AC312043AD

Connector: C-123 <RHD>

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-463

Step 2. Check the hazard warning lamp switch.
Refer to GROUP 54A 

− Hazard warning lamp switch 

P.54A-101

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the hazard warning lamp switch.

Step 3. Resistance measurement at the C-123 
hazard warning lamp switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between C-123 hazard warning lamp 

switch connector terminal No.2 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

Step 4. Check the wiring harness between C-123 
hazard warning lamp switch connector terminal 
No.2 and the body earth.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-31 <RH drive vehicles>, and repair if 
necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

AC312031

AD

Connector: C-123 <LHD>

Harness side

AC312043AD

Connector: C-123 <RHD>

Harness side

AC312730AD

Connector C-123
(Harness side)

AC312031

AD

Connector: C-123 <LHD>

Harness side

AC312043AD

Connector: C-123 <RHD>

Harness side

AC312043AE

Connector: C-31 <RHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-464

Step 5. Connector check: C-221 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Step 6. Check the wiring harness between C-221 
ETACS-ECU connector terminal No.55 and C-123 
hazard warning lamp switch connector terminal 
No.1.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

AC312037

Connector: C-221  <LHD>

Junction block (Rear view)

AD

Harness side

AC312047

Connector: C-221  <RHD>

Junction block (Rear view)

AD

Harness side

AC312037

Connector: C-221  <LHD>

Junction block (Rear view)

AD

Harness side

AC312047

Connector: C-221  <RHD>

Junction block (Rear view)

AD

Harness side

AC312031

AD

Connector: C-123 <LHD>

Harness side

AC312043AD

Connector: C-123 <RHD>

Harness side