ECM Terminal Arrangement

1. Remove the main body ECM (network gateway computer) from the instrument panel junction block ASSY.
2. Measure the voltage and resistance between terminals.
   STANDARD VALUE SPECIFICATION
   
   

   Terminal No. (Terminal symbol)	Inspection conditions	Standard value
   A73-2 (HRLY) ←→ Chassis ground	Always	11 to 14 V
   A73-4 (GND) ←→Chassis ground	Always	Less than 1 Ω
   A73-23 ←→Chassis ground	Always	11 to 14 V
   MB-30 (FFGO) ←→Chassis ground	When the tail lights are on	11 to 14 V
   D6-1 (GND) ←→Chassis ground	Always	Less than 1 Ω
   3C-4 ←→Chassis ground	IG ON	11 to 14 V
   3C-7 ←→Chassis ground	Always	11 to 14 V
   3E-1 ←→Chassis ground	Always	11 to 14 V

   NOTE: If it is outside the standard values, the vehicle is defective.
3. Install the main body ECM (network gateway computer) on the instrument panel junction block ASSY
4. Measure the resistance between the terminals.
   STANDARD VALUE SPECIFICATION
   
   

   Terminal No.	Inspection conditions	Standard value
   D6-13 (CLTE)(1) ←→Chassis ground	Always	Less than 1 Ω
   (1) When there is auto light control

5. Measure the voltage between the terminals.
   STANDARD VALUE SPECIFICATION
   
   

   Terminal No. (Terminal symbol)	Inspection conditions	Standard value
   A73-11 (DIM) ←→Chassis ground	When in key SW OFF, IG OFF, or ACC OFF, light control switch OFF →HEAD	Less than 1 V →11 to 14 V
   A73-12 ←→Chassis ground	IG ON, light control switch OFF →HEAD	11 to 14 V →Less than 1 V
   D5-2 (HEAD) ←→Chassis ground	Key SW ON, light control switch OFF →HEAD(1)	11 to 14 V →Less than 1 V
   	ACC ON, light control switch OFF →HEAD(2)
   D5-23 (A)(3) ←→Chassis ground	Light control switch OFF →AUTO	11 to 14 V →Less than 1 V
   D5-24 (FFOG) ←→Chassis ground	Front fog light switch OFF →ON	11 to 14 V →Less than 1 V
   D5-25 (TAIL) ←→Chassis ground	Light control switch OFF →TAIL	11 to 14 V →Less than 1 V
   D6-14 (CLTS)(3) ←→Chassis ground	IG ON, light control switch is AUTO, automatic control sensor is covered by something that doesn't let light through →exposed	Pulse generation (changes according to the light) (waveform 1)
   D6-15 (CLTB)(3) ←→Chassis ground	IG ON	11 to 14 V
   MB-18 (HF) ←→Chassis ground	Headlight dimmer switch (flashing) OFF→ON	11 to 14 V →Less than 1 V
   MB-21 (HU) ←→Chassis ground	When the light control switch is set to HEAD, LO beam →HI beam	11 to 14 V →Less than 1 V
   (1) Without smart entry & start system (2) With smart entry & start system (3) With auto light control

*: When there is auto light control

Courtesy of SUBARU OF AMERICA, INC.