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Ecu Terminal Check

COLUMN ECU PIN VOLTAGE CHECK

Terminal No. (1) Circuit Description Test Condition Value
1 B+ Always Battery Voltage
2 Data Request Signal Input Always 0-5 Volts (Pulse)
3 Multiplex Communication Line Always 0-12 Volts (Pulse)
4 Ground Always No Voltage
6 Wiper Switch Intermittent (2) 0-2.5 Volts
8 Wiper Switch Backup Output Wiper Switch Low Or High Speed Position (3)
9 Ignition Power Source (IGN 1) Ignition On Battery Voltage
10 Headlight Switch Backup Output Ignition & Headlight Switch On 0-1 Volt
(1) See Figure .
(2) Ignition switch in ACC and wiper intermittent switch rotated from long to short interval position.
(3) No voltage when wiper motor operates, battery voltage when wiper motor does not operate.
NOTE: Since ETACS ECU is mounted directly to junction block, measurement for junction block connector C311 terminals is impossible. Terminals No. 1-20 are listed for reference only.
ETACS ECU PIN VOLTAGE CHECK

Terminal No. (1) Circuit Description Test Condition Value
1 Ground Always No Voltage
2 B+ For ECU Always Battery Voltage
4 Left Turn Signal Input Left Turn Signal On Battery Voltage
5 Right Turn Signal Input Right Turn Signal On Battery Voltage
6 Door Lock Output When Doors Locks Are Locking Battery Voltage
7 Ignition Switch Power Source (ACC) Ignition Switch In ACC Battery Voltage
11 Ignition Switch Power Source Ignition Switch On Battery Voltage
12 Door Unlock Output (Passenger's Door) When Passenger's Door Lock Is Unlocking Battery Voltage
Door Unlock Output When Doors Locks Are Unlocking Battery Voltage
13 Driver's Door Switch Input Signal Driver's Door Open No Voltage
16 B+ For Power Door Locks Always Battery Voltage
17 Door Lock Output (Driver's Door) When Driver's Door Lock Is Unlocking Battery Voltage
18 B+ For Turn Signals Always Battery Voltage
19 Door Switches Signal Input Either Door open No Voltage
20 Interior Lights Output When Interior Lights Are On 2 Volts Or Less
21 Driver's Door Lock Switch Lock Signal Input Driver's Door Lock Switch In Lock Position No Voltage
22 Driver's Door Lock Switch Unlock Signal Input Driver's Door Lock Switch In Unlock Position No Voltage
23 Passenger's Door Lock Switch Lock Signal Input Passenger's Door Lock Switch In Lock Position No Voltage
24 Passenger's Door Lock Switch Unlock Signal Input Passenger's Door Lock Switch In Unlock Position No Voltage
25 Door Ajar Indicator Output When Door Ajar Indicator Is On 2 Volts Or Less
27 Trunk Lid Latch Switch Signal Input Trunk Lid Open No Voltage
28 Trunk Lid Key Switch Signal Input Trunk Lid Key Switch In Unlock Position No Voltage
29 Washer Fluid Level Switch Signal Input Washer Fluid Level Low No Voltage
31 Driver's Door Key Switch Lock Signal Input Driver's Door Key Switch In Lock Position No Voltage
32 Driver's Door Key Switch Unlock Signal Input Driver's Door Key Switch In Unlock Position No Voltage
33 Passenger's Door Key Switch Lock Signal Input Passenger's Door Key Switch In Lock Position No Voltage
34 Passenger's Door Key Switch Unlock Signal Input Passenger's Door Key Switch In Unlock Position No Voltage
35 Manual Door Lock Switch Lock Signal Input Manual Door Lock Switch In Lock Position No Voltage
36 Manual Door Lock Switch Unlock Signal Input Manual Door Lock Switch In Unlock Position No Voltage
37 Low Washer Indicator Output Signal Washer Fluid Level Low 2 Volts Or Less
38 Anti-Theft Horn Output Anti-Theft Horn Is On 2 Volts Or Less
39 Anti-Theft Indicator Output Anti-Theft Indicator Is On 2 Volts Or Less
40 Trunk Lid Opener Output Trunk Lid Opener Actuator Is Locking Battery Voltage
41 Ground Always No Voltage
42 Multiplex Communication Line Always 0-12 Volts (Pulse)
43 Data Request Signal Input Always 0-5 Volts (Pulse)
44 Low Fuel Indicator Signal Input Low Fuel Indicator Is On 2 Volts Or Less
45 Foglight Switch Signal Input Foglight Switch On No Voltage
47 Hazard Warning Light Switch Signal Input Hazard Warning Light Switch On No Voltage
48 Key In Reminder Signal Input Ignition Key Removed No Voltage
49 Diagnosis Indication Selection Signal Input When Scan Tool Is Connected To DLC No Voltage
50 Diagnosis Output Or Input Signal Check Output When Diagnosis Is Output 0-12 Volts (Pulse)
When Input Signal Check Is Output 0, 12 Volts (When Pulse Signal Changes)
51 Wiper Intermittent Adjustment Signal Input (2) 0-2.5 Volts
52 Vehicle Speed Sensor Signal Input When Vehicle Is Moving 0-12 Volts (Pulse)
(1) See Figure , Figure and Fig 1 .
(2) Ignition switch in ACC and wiper intermittent switch rotated from long to short interval position.
Fig 1: Identifying ETACS ECU Connector C312 Terminals
G00020144Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
NOTE: Since Front ECU is mounted directly to relay box, measurement of connector terminals is impossible. Terminals and values are listed for reference only.
FRONT ECU PIN VOLTAGE CHECK

Terminal No. (1) Circuit Description Test Condition Value
1 Ground Always No Voltage
2 Headlight Low Relay Output Low Beam Headlights On 2 Volts Or Less
3 Headlight High Relay Output High Beam Headlights On 2 Volts Or Less
4 Taillight Relay Output Taillights On 2 Volts Or Less
5 Headlight Switch Backup Input Headlight Switch On (Any Position) No Voltage
6 Wiper Switch Backup Input Wiper Switch In High Or Low Position No Voltage
7 Wiper Auto Stop Input Wiper Switch In High Or Low Position Battery Voltage
9 Ignition Switch Power Source (ACC) Ignition In ACC Battery Voltage
10 Wiper/Washer Output Wiper/Washer Operated Battery Voltage
11 Wiper Low Output Wiper Switch In Low Position Battery Voltage
12 Wiper High Output Wiper Switch In High Position Battery Voltage
13 Foglight Relay Output Foglights On 2 Volts Or Less
14 Power Window Relay Output When Power Window Can Be Operated 2 Volts Or Less
15 Ignition Switch Power Source (IGN 2) Ignition On Battery Voltage
16 B+ Always Battery Voltage
17 Multiplex Communication Line Always 0-12 Volts (Pulse)
(1) See Figure .
SUN ROOF ECU PIN VOLTAGE CHECK

Terminal No. (1) Circuit Description Test Condition Value
1 Sun Roof Motor B+ Always Battery Voltage
2 Ignition Switch Power Source (IGN 2) Ignition On Battery Voltage
3 ECU B+ Always No Voltage
5 Ground Always No Voltage
6 Sun Roof Switch Close/Tilt Down Signal Sun Roof Switch Close/Tilt Down Position No Voltage
8 Sun Roof Switch Open/Tilt Up Signal Sun Roof Switch Open/Tilt Up Position No Voltage
9 Ground Always No Voltage
10 Multiplex Communication Line Always 0-12 Volts (Pulse)
(1) See Figure .
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