ECM Terminal Arrangement
WARNING: This page is about a different car, the 2019 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
- Check the instrument panel junction block ASSY and the main body ECM (multiplex network body ECM).
- Remove the main body ECM (multiplex network body ECM) from the instrument panel junction block ASSY.
- Disconnect the connectors D5, D6, and A73 of the main body ECM (multiplex network body ECM).
- Measure the voltage and resistance according to the following table.
Terminal No. (symbol) Terminal description Conditions Specified condition MB-1 - chassis ground Battery power supply Always 11 to 14 V MB-8 - chassis ground IG SW power supply IG SW ON 11 to 14 V IG SW OFF 1 V or less MB-9 - chassis ground ACC power supply IG SW ACC 11 to 14 V IG SW OFF 1 V or less MB-11 - chassis ground Ground Always 1 Ωor less MB-32 - chassis ground Battery power supply Always 11 to 14 V D5-22 - chassis ground Unlock warning switch input Key is not inserted in ignition key cylinder (OFF) 1 V or less Key is inserted to the ignition key cylinder (ON). 11 to 14 V D6-1 - Chassis ground Ground Always 1 Ωor less A73-4 - chassis ground Ground Always 1 Ωor less - Reconnect the connector D5, D6, and A73 of the main body ECM (multiplex network body ECM).
- Install the main body ECM (multiplex network body ECM) to the instrument panel junction block ASSY.
- Measure the voltages and pulses according to the values indicated in the table below.
Terminal No. (symbol) Terminal description Conditions Specified condition 3A-28 - chassis ground Driver's side courtesy light switch Driver's door is open. 1 V or less Driver's door is closed Pulse generation