CHARGING SYSTEM TERMINALS OF ECM

  1. CHECK ECM

    A324559E07
    Tip:

    The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, 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

    B186-117 (VCIB) - B186-39 (EIB)

    P - R

    Power source of battery current sensor assembly

    Ignition switch ON

    4.5 to 5.5 V

    B186-61 (LIN) - Body ground

    R - Body ground

    LIN communication line

    Ignition switch off

    10 kΩ or higher

    B186-87 (THB) - B186-39 (EIB)

    L - R

    Battery temperature sensor (built into battery current sensor assembly)

    Ignition switch ON

    0.2 to 4.8 V

    B186-86 (IB) - B186-39 (EIB)

    B - R

    Battery current sensor assembly

    Ignition switch ON

    0.2 to 4.8 V

    B186-59 (E1) - Body ground

    BR - Body ground

    Ground

    Always

    Below 1 Ω

    A50-1 (BATT) - B186-59 (E1)

    P - BR

    Battery (for measuring battery voltage and for ECM memory)

    Always

    11 to 14 V

    A50-18 (INH) - B186-59 (E1)

    R - BR

    Wiper switch signal

    Ignition switch ON, wiper switch HI position

    11 to 14 V