Check At Multi-Center Display Unit Terminal

Fig 1: Multi-Center Display Unit Connector Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CONNECTOR TERMINALS REFERENCE CHART

TERMINAL NO.	INPUT/OUTPUT	SIGNAL SYMBOL	TERMINAL VOLTAGE (V)	HARNESS DISCREPANCY		FAILURE SYMPTOM DUE TO HARNESS DISCREPANCY
1	Input	Battery (Battery power supply)	Battery positive voltage	Open circuit	-	Screen is not displayed. All operations are not possible.
				-	Short circuit	Fuse is blown.
2	Input	Ignition switch (IG1)	Battery positive voltage	Open circuit	-	Screen is not displayed. All operations are not possible.
				-	Short circuit	Fuse is blown.
3	Input	Ignition switch (ACC)	Battery positive voltage	Open circuit	-	Screen is not displayed. All operations are not possible.
				-	Short circuit	Fuse is blown.
4	Input	ILL + (lighting switch)	Hi: Battery positive voltage Lo: 0 - 1	Open circuit	Short circuit	Not lighted.
5	Output	ILL - (illumination light control signal)	0.4	Open circuit	Short circuit	Display brightness control is not possible.
6	-	GND	1 V or less	Open circuit	-	Screen is not displayed.
7	Input/output	SB3	-	-	-	-
8	Input/output	M-DATA (Audio) (M-BUS data signal)	Hi: 4 - 5 Lo: 0 - 1	Open circuit	Short circuit	Low grade type "E" or "E01" to "E03" indications Middle grade type Frozen screen (screen does not change) "Communication Error" indication
9	Input/output	M-CLOCK (A/C) (M-BUS clock signal)	Hi: 4 - 5 Lo: 0 - 1	Open circuit	Short circuit	Low grade type "E" or "E01" to "E03" indications Middle grade type Frozen screen (screen does not change) "Communication Error" indication
10	Input/output	M-BUSY (Audio)	Hi: 5 Lo: 0 - 1	Open circuit	Short circuit	Low grade type "E" or "E01" to "E03" indications Middle grade type Frozen screen (screen does not change) "Communication Error" indication
11 (Low-grade type)	Input	Vehicle speed signal	Hi: 5 Lo: 0 - 1	Open circuit	Short circuit	-
14 - 20	No connection