Below is the from factory Toyota wiring diagrams (e.g., Hiace RZH10 series, 1995–1998). Connector A (22 pins) – Main Engine Control | Pin | Wire Color | Function | Signal Type | |------|------------|----------|--------------| | A1 | Black/Red | Battery +12V (constant) | Power | | A2 | White/Red | Main EFI relay control (to relay coil) | Output | | A3 | Black/Yellow | Starter signal (ST) | Input | | A4 | Black/White | Ignition switch IG +12V | Power | | A5 | Black | Ground (ECU power ground) | Ground | | A6 | Brown | Ground (ECU sensor ground) | Ground | | A7 | Yellow/Black | Check Engine Light (W) | Output | | A8 | Blue/Red | Tachometer output | Output | | A9 | Yellow/Green | Diagnostic (TE1 – connect to TE2 for diag mode) | I/O | | A10 | White/Black | Diagnostic (TE2) | I/O | | A11 | Green/Orange | Neutral start switch (NSW) – auto trans only | Input | | A12 | Green/Yellow | Air conditioner request signal (AC) | Input | | A13 | Red/Blue | Power steering oil pressure switch | Input | | A14 | Black/Orange | Fuel pump relay control (FP) | Output | | A15 | Red/White | Injector #1 | Output | | A16 | Blue | Injector #2 | Output | | A17 | Green | Injector #3 | Output | | A18 | Yellow | Injector #4 | Output | | A19 | Gray | Igniter (IGT) – ignition timing signal | Output | | A20 | Violet | IGF (ignition confirmation) – feedback from igniter | Input | | A21 | Pink | Throttle position sensor (VTA) | Analog input | | A22 | Blue/White | Throttle position sensor (IDL – idle contact) | Switch | Connector B (16 pins) – Sensors & Actuators | Pin | Wire Color | Function | Signal Type | |------|------------|----------|--------------| | B1 | Red/Green | Engine coolant temperature sensor (THW) | Analog input | | B2 | White/Green | Intake air temperature sensor (THA) | Analog input | | B3 | Black/Blue | Oxygen sensor (OX) – 1-wire or 4-wire | Analog (0–1V) | | B4 | Green/White | Distributor NE (crank position / 24° signal) | Digital | | B5 | Red/Black | Distributor G1 (cam position / 180° signal) | Digital | | B6 | Brown/Yellow | Distributor G2 (cam position – secondary) | Digital | | B7 | Blue/Black | Vehicle speed sensor (SPD) | Digital (pulse) | | B8 | White | ISC valve (idle speed control) – open coil | Output (duty) | | B9 | Black/Yellow | ISC valve – close coil | Output (duty) | | B10 | Green/Black | MAP sensor (manifold absolute pressure) – signal | Analog | | B11 | Red/Yellow | MAP sensor (VCC – 5V reference) | Power out | | B12 | White/Black | MAP sensor (E2 – sensor ground) | Ground | | B13 | Blue/Orange | EGR vacuum modulator (if equipped) | Output | | B14 | Not used | – | – | | B15 | Violet/White | A/C idle-up valve | Output | | B16 | Black/White | +B (ECU backup power – switched via EFI relay) | Power | 3. Power Distribution Diagram (Simplified) The 7K-E wiring follows this power path:
→ IGN fuse (7.5A) → ECU pin A4 (ignition power) → ECU activates EFI relay coil via pin A2 (ground side) toyota 7k ecu wiring diagram
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] Below is the from factory Toyota wiring diagrams (e
For further assistance, search for or Corona CT1# factory repair manuals – they contain the full 7K-E wiring schematics. Document version 1.0 – Compiled from Toyota EWDs, 7K-E service bulletins, and field testing. Document version 1
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All classes offered as standard courses, or we can work with you to address your organization's specific needs, including via the combination and/or customization of our training offerings.
