Mitsubishi Grandis. Manual - part 201

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-266

Inspection Procedure J-4: Vehicle speed-dependent unfolding function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in 
accordance with the input signals below.

• Ignition switch (IG1)

• Vehicle speed signal

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be 
defective. In addition, it is possible that the function 
except the vehicle speed-dependent unfolding 
function has been set by using the customized 
function.

POSSIBLE CAUSES

• Malfunction of ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the SWS monitor customized 
function.

Check that "WING MIRROR" is set to "SPEED SEN 
FUN" by using the customized function.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Set "WING MIRROR" to "SPEED SEN 
FUN" by using the customized function. 
(Refer to 

P.54C-574

).

Step 2. Check the electric folding door mirrors 
operation.

Check that the door mirror is folded and unfolded 
with the remote controlled mirror switch when the 
ignition switch is at ACC position.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure J-1 "The 
electric retractable remote controlled door 
mirrors does not work at all 

P.54C-250

."

Step 3. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the 
ETACS-ECU and the SWS communication lines are 
normal.

• Ignition switch: ON

ECUS TO BE CHECKED

• ETACS ECU

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

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

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

P.54C-63

."

SPEED SIGNAL

COMBINATION METER

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

INPUT SIGNAL

ETACS-ECU

INPUT SIGNAL

IGNITION SWITCH (IG1)

Vehicle Speed-Dependent Unfolding Function

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-267

Step 4. ETACS ANALOG data by using the SWS 
monitor.

Check the ETACS-ECU signal related to the vehicle 
speed-dependent unfolding function.

• Set the simulated vehicle speed at approximately 

10 km/h.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Refer to inspection procedure Q-25 "The 
vehicle speed signal is not received 

P.54C-568

."

STEP 5. Retest the system.

Check that the vehicle speed-dependent unfolding 
function works normally.

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 : 

Replace the ETACS-ECU.

IGNITION KEY CYLINDER 
ILLUMINATION LAMP

Inspection Procedure K-1: The ignition key cylinder illumination lamp does not illuminate/extinguish 
normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in 
accordance with the input signals below.

<Vehicles without keyless entry system>

• Ignition switch (IG1)

• Driver's door switch

<Vehicles with keyless entry system>

• Ignition switch (IG1)

• Key reminder switch

• Driver's door switch

Item No.

Item name

Normal condition

Item 03

SPEED SENSOR

8 

− 10 km/h

Ignition Key Cylinder Illumination Lamp Circuit

KEY
REMINDER SWITCH

IGNITION
SWITCH (IG1)

ETACS-ECU

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   

KEY CYLINDER
ILLUMINATION LAMP

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-268

• Interior lamp loaded signal

If this function does not work normally, these input 
signal circuit(s), the ignition key cylinder illumination 
lamp or the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the key reminder switch

• Malfunction of the driver's door switch

• Malfunction of the ignition key cylinder 

illumination lamp

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation of the interior lamp.

Check that the interior lamps illuminate and 
extinguish normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to inspection procedure P-1 "The 
interior lamps (room ramp, rear personal 
lamps, door lamps, luggage compartment 
lamp, key illumination lamp) does not 
illuminate or extinguish normally 

P.54C-374

."

Step 2. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the 
ETACS-ECU and the SWS communication lines are 
normal.

• Ignition switch: OFF

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-63

."

Step 3. SWS monitor data list

Check the SWS communication signal, which are 
related to the ignition key cylinder illumination lamp.

<Selected item> ETACS ECU

• Ignition switch: OFF

• Driver's door: open

OK: Normal conditions are displayed for all 
the items

Q: Are the check result normal?

Normal conditions are displayed for all the items. 
<Vehicles without keyless entry system> : 

Go to 

Step 4.

Normal conditions are displayed for all the items. 
<Vehicles with keyless entry system> : 

Go to Step 

5.

Normal condition is not displayed for item No.30. : 

Refer to inspection procedure Q-2 "The 
ignition switch (IG1) signal is not received 

P.54C-460

."

Normal condition is not displayed for item No.32. : 

Refer to inspection procedure Q-5 "The 
driver's door switch signal is not received 

P.54C-474

 <LH drive vehicles> or 

P.54C-476

 <RH drive vehicles>."

Step 4. ETACS switch data by using the SWS 
monitor

Check the ETACS-ECU communication signal, which 
is related to the ignition key cylinder illumination 
lamp.

• Ignition switch: OFF (key inserted)

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Refer to inspection procedure Q-11 "The 
key reminder switch signal is not received 

P.54C-493

."

Item No.

Item name

Normal 
condition

Item 30

IG SW(IG1)

OFF

Item 32

DR DOOR SW

ON

Item No.

Item name

Normal 
condition

Item 03

KEY REMIN SW

OFF

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-269

Step 5. Connector check: C-308 key reminder 
switch connector.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Step 6. Check the bulb of the ignition key 
cylinder illumination lamp.

Check the bulb of the ignition key cylinder 
illumination lamp.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the bulb of the ignition key cylinder 
illumination lamp.

Step 7. Connector check: C-221 ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the defective connector.

AC310153AD

Connector: C-308 <LHD>

Harness side

AC310183

AD

Connector: C-308 <RHD>

Harness side

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

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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

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Harness side

C-221(GR)