Check At Ecu Terminals

Fig 1: Identifying ECU Connector Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

ECU CONNECTOR TERMINALS REFERENCE

Terminal No.	Check item	Check conditions	Normal conditions
1	ECU power supply (battery)	Always	Battery voltage
2	ECU power supply (Ignition switch: IG1)	Ignition switch: ON	Battery voltage
2	ECU power supply (Ignition switch: IG1)	Ignition switch: OFF	0 V
3	Meter information switch input	Meter information switch: ON	0 V
3	Meter information switch input	Meter information switch: OFF	Approximately 5 V
4	Parking brake switch input	Parking brake switch: ON	0 V
4	Parking brake switch input	Parking brake switch: OFF	Approximately 5 V
5	Seat belt switch (driver's side) input	Seat belt switch (driver's side): ON	0 V
5	Seat belt switch (driver's side) input	Seat belt switch (driver's side): OFF	Approximately 5 V
6	Headlamp levelling	During headlight levelling warning display	0 V
6	Headlamp levelling	Without headlight levelling warning display	Approximately 5 V
7	-	-	-
8	Corner sensor RL	When sensor detection is made	0 V
8	Corner sensor RL	When sensor detection is not made	Approximately 5 V
9	Corner sensor RR	When sensor detection is made	0 V
9	Corner sensor RR	When sensor detection is not made	Approximately 5 V
10	Corner sensor FL	When sensor detection is made	0 V
10	Corner sensor FL	When sensor detection is not made	Approximately 5 V
11	Corner sensor FR	When sensor detection is made	0 V
11	Corner sensor FR	When sensor detection is not made	Approximately 5 V
12	Car symbol input	When sensor detection is made	0 V
12	Car symbol input	When sensor detection is not made	Approximately 5 V
13	Earth (sensor)	Always	0 V
14, 15	-	-	-
16	Front seat belt switch (LH) input	Front seat belt switch (LH): ON	0 V
16	Front seat belt switch (LH) input	Front seat belt switch (LH): OFF	Approximately 5 V
17	Fuel level sensor input	Fuel: FULL	Approximately 1 V
17	Fuel level sensor input	Fuel: EMPTY	Approximately 4 V
18	Fuel level sensor input	Fuel: FULL	Approximately 1 V
18	Fuel level sensor input	Fuel: EMPTY	Approximately 4 V
19	-	-	-
20	Vehicle speed signal output	Vehicle speed: Approximately 40 km/h	Approximately 28Hz
20	Vehicle speed signal output	Vehicle speed change	In accordance with the vehicle speed, a pulse is generated.
21	Earth (ECU)	Always	0 V
22	Illumination (-) output	With daytime lighting control	0 V
22	Illumination (-) output	With nighttime lighting control	In accordance with the rheostat switch operation, a pulse is generated.
23	Illumination (+) output	With lighting control	Battery voltage
24	Illumination (power supply)	Always	Battery voltage