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Using Voltmeter

Using Diagnostic Trouble Code Check Harness (MB991529), connect voltmeter to Data Link Connector (DLC) terminal No. 9 (ETACS-ECU) and terminal No. 4 (ground) or No. 5 (ground). See Fig 1 . Operate indicated switches. See SWITCH INPUT SIGNAL REQUIREMENTS  table. If switch input signal is received at DLC, voltmeter needle will fluctuate once. If switch input is not received at DLC, diagnose problem. See INPUT SIGNAL SYMPTOM TEST INDEX  table.

Fig 1: Checking Input Switch Signals At Data Link Connector (DLC) Using Voltmeter
G00020164Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
SWITCH INPUT SIGNAL REQUIREMENTS

Input Signal Condition To Activate Input Signal
Ignition Switch (ACC) Turn From LOCK To ACC Position
Ignition Switch (IG1) Turn From ACC To ON Position
Key Reminder Switch Remove Ignition Key From Ignition Key Cylinder
Hazard Light Switch Turn Switch From OFF To ON Position
Foglight Switch (1) Turn Switch From OFF To ON Position
Backup Light Switch (2) Move Shift Lever To "R" Position
Park/Neutral Position Switch (3) Move Selector Lever To "R" Position
Rear Wiper Motor Auto-Stop Signal (4) (5) Rear Wiper Begins To Operate
Driver's Seat Belt Switch With Ignition Switch In ON Position, Remove Seat Belt Tongue From Belt Buckle
Driver's Or Passenger's Door Switch Open Appropriate Door
Driver's Or Passenger's Door Lock Key Cylinder Switch Using Key, Turn Door Lock To LOCK Or UNLOCK Position
Driver's Or Passenger's Door Lock Actuator Switch Move Appropriate Door Lock Knob To LOCK Or UNLOCK Position
Door Lock Switch (6) Press LOCK Or UNLOCK Side Of Switch
Hood Switch (7) Open Hood
Liftgate Latch Switch (7) Open Liftgate
Liftgate Lock Key Cylinder Switch (7) Using Key, Turn Liftgate Lock To UNLOCK Position
Column Switch
Taillight Switch Turn Lighting Switch From OFF Position To TAILLIGHT Position
Headlight Switch Turn Lighting Switch From TAILLIGHT Position To HEADLIGHT Position
Passing Light Switch Turn Dimmer/Passing Switch From OFF To PASSING Position
Dimmer Switch Turn Dimmer/Passing Switch From PASSING To DIMMER Position
Turn Signal Switch Turn From OFF To ON Position
Mist Wiper Switch Turn From OFF To ON Position
Intermittent Wiper Switch Turn From OFF To ON Position
Low Speed Wiper Switch Turn From OFF To ON Position
High Speed Wiper Switch Turn From OFF To ON Position
Intermittent Wiper Interval Adjusting Knob (8)
Washer Switch Turn From OFF To ON Position
Rear Wiper Switch (9) Turn From OFF To ON Position
Rear Washer Switch (9) Turn From OFF To ON Position
Sunroof Switch (10)
CRUISE TILT-DOWN Position Turn From OFF To ON Position
TILT-UP Position Turn From OFF To ON Position
OPEN Position Turn From OFF To ON Position
Transmitter (11)
LOCK Switch Turn From OFF To ON Position
UNLOCK Switch Turn From OFF To ON Position
PANIC Switch (7) Turn From OFF To ON Position
(1) If equipped.
(2) On vehicles with manual transmission and rear wiper and washer.
(3) On vehicles with automatic transmission and rear wiper and washer.
(4) On vehicles with rear wiper and washer.
(5) Input signal is sent just before rear wiper begins to operate.
(6) Incorporated in power window main switch and power window sub-switch.
(7) Vehicles with anti-theft alarm system.
(8) Rotate intermittent wiper interval adjusting knob from FAST to SLOW position when ignition switch is in ON position. ETACS-ECU sends signal around medium knob position.
(9) On vehicles with rear wiper and washer.
(10) On vehicles with sunroof.
(11) On vehicles with keyless entry.
INPUT SIGNAL SYMPTOM TEST INDEX

Input Signal Symptom Perform Symptom Test
Ignition Switch ACC Signal Is Not Sent O-1 
Ignition Switch IG1 Signal Is Not Sent O-2 
Key Reminder Switch Signal Is Not Sent O-3 
Hazard Warning Light Switch Signal Is Not Sent O-4 
Fog Light Switch Signal Is Not Sent O-5 
Backup Light Switch Signal Is Not Sent (M/T) O-6 
Park/Neutral Position Switch Signal Is Not Sent (A/T) O-7 
Rear Wiper Motor Auto-Stop Signal Is Not Sent O-8 
Driver's Seat Belt Switch Signal Is Not Sent O-9 
Driver's Or Passenger's Door Switch Signal Is Not Sent O-10 
Driver's Or Front Passenger's Door Lock Key Cylinder Switch Signal Is Not Sent O-11 
Driver's Or Passenger's Door Lock Actuator Switch Signal Is Not Sent O-12 
Door Lock Switch (Incorporated In Power Window Main Switch & Power Window Sub Switch) Signal Is Not Sent O-13 
Hood Switch Signal Is Not Sent O-14 
Liftgate Latch Switch Signal Is Not Sent O-15 
Liftgate Lock Key Cylinder Switch Signal Is Not Sent O-16 
Column Switch
Taillight Switch Signal Is Not Sent O-17 
Headlight Switch Signal Is Not Sent O-17 
Passing Light Switch Signal Is Not Sent O-17 
Dimmer Switch Signal Is Not Sent O-17 
Turn Signal Light Switch Signal Is Not Sent O-17 
Windshield Mist Wiper Switch Signal Is Not Sent O-18 
Windshield Intermittent Wiper Switch Signal Is Not Sent O-18 
Windshield Low Speed Wiper Switch Signal Is Not Sent O-18 
Windshield High Speed Wiper Switch Signal Is Not Sent O-18 
Windshield Wiper Intermittent Intervals Adjusting Knob Signal Is Not Sent O-19 
Windshield Washer Switch Signal Is Not Sent O-18 
Rear Wiper Switch Signal Is Not Sent O-18 
Rear Washer Switch Signal Is Not Sent O-18 
Sunroof Switch
CLOSE/TILT-DOWN Switch Signal Is Not Sent O-20 
TILT-UP Switch Signal Is Not Sent O-20 
OPEN Switch Signal Is Not Sent O-20 
Transmitter
LOCK Switch Signal Is Not Sent O-21 
UNLOCK Switch Signal Is Not Sent O-21 
PANIC Switch Signal Is Not Sent O-21 
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