CHARGING SYSTEM TERMINALS OF ECM
Tech Tips
The standard voltage and resistance between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage and resistance for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A76-1 (BATT) - C111-59 (E1) | P - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| C111-59 (E1) - Body ground | BR - Body ground | Earth (ground) circuit of ECM | Always | Below 1 Ω |
| C111-61 (LIN) - Body ground | L - Body ground | LIN communication signal | Ignition switch off (while LIN communication is stopped) | 10 kΩ or higher |
| C111-86 (IB) - C111-118 (EIB) | B - BR | Battery current sensor signal | Ignition switch ON (Temperature of thermistor of battery current sensor: -30 to 90°C (-22 to 194°F)) |
0.5 to 4.5 V |
| C111-87 (THB) - C111-118 (EIB) | P - BR | Battery current sensor thermistor signal | Ignition switch ON (Temperature of thermistor of battery current sensor: -30 to 90°C (-22 to 194°F)) |
0.5 to 4.5 V |
| C111-117 (VCIB) - C111-118 (EIB) | LG - BR | Battery current sensor power supply | Ignition switch ON | 4.5 to 5.5 V |
| C111-118 (EIB) - Body ground | BR - Body ground | Battery current sensor ground | Always | Below 1 Ω |