Voltage at ECU Wiring Connectors No. | Terminals | Condition | STD Voltage | See Page 1 | BATT - E1 | - | 10 - 14 | FI-52 | IG SW - E1 | Ignition SW ON | 10 - 14 | FI-53 | M-REL - E1 | | | | +B (+B1) - E1 | | | FI-54 2 | IDL - E2 | Ignition SW ON | Throttle valve open | 4 - 6 | FI-55 | VC - E2 | | Throttle valve fully closed | 0.1 - 1.0 | FI-56 | VTA - E2 | | Throttle valve fully open | 3.2 - 4.2 | 3 | KS - Body ground | Ignition SW ON | 4 - 6 | FI-57 | | Cranking or running | 2 - 4 | | VC - Body ground | Ignition SW ON | 4 - 6 | FI-58 4 | No. 10 - E01 No. 20 - E02 No. 30 | Ignition SW ON | 10 - 14 | FI-59 5 | THA - E2 | Ignition SW ON | Intake air temperature 20°C (68°F) | 1 - 3 | FI-60 6 | THW - E2 | Ignition SW ON | Coolant temperature 80°C (176°F) | 0.1 - 1.0 | FI-61 7 | STA - E1 | Cranking | 6 - 14 | FI-62 8 | IGT - E1 | Idling | 0.7 - 1.0 | FI-63 9 | IGDA IGDB - E1 | Idling | 1 - 3 | FI-64 10 | ISC1 ISC4 - E1 | Ignition SW ON | 9 - 14 | FI-65 11 | W - E1 | No trouble ("CHECK ENGINE" warning light off) and engine running | 8 - 14 | FI-66 12 | A/C - E1 | Air conditioning ON | 10 - 14 | FI-67 ECU Terminals [THIS IS DIAGRAM: ECU terminal connector diagram showing pin layout with labels including M-REL, BATT, IG SW, +B1, various other terminals and connections arranged in rows]