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Suzuki Samurai EFI Wiring Diagram - ECM, Ignition Coil, O2 & Cam Sensor Circuits
Reference · 1986-1995 SamuraiAll 73 wiring diagrams
Wiring diagram showing the ignition system, heated oxygen sensor and camshaft position sensor circuits tied to the engine control module.
Part of 1986-1995 Suzuki Samurai Wiring Diagrams
This document is one page (EFI1.gif) of a multi-page electronic fuel injection (EFI) wiring diagram for a Suzuki vehicle, uploaded to a 1986 Suzuki Samurai gallery. It shows the Engine Control Module (ECM, connectors E33 and E34) and its connections to major EFI/ignition components: a 15A fuse (position 18) in the fuse box, the ignition coil (E17), igniter/power transistor (E18), distributor, noise filter (E23), combination meter (with vehicle speed sensor and malfunction indicator/check engine lamp, connectors E38/G05, G09, G11, G06/E37), heated oxygen sensor (E19), camshaft position sensor (C09), data link connector, and power steering pressure switch (E28). Wire colors are labeled throughout, including B/W, B/Bl, Br/W, B/Y, V/Y, Y/Y, V/G, O/Bl, Bl/B, Bl/O, Gr/Y, R/Bl, Y/Bl, P, W, Br, O, and Y. Connector pin numbers are given for each component and for ECM pins (e.g., E34 pins 7, 14, 8, 4, 19; E33 pins 1, 23, 20, 2, 3, 16). Ground points 3, 4, and 10 are shown at the bottom. A reader can trace ECM power, ignition trigger, sensor, and ground circuits and identify wire colors and connector pinouts for diagnosis.
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Frequently asked questions
- What fuse feeds this EFI circuit?
- A 15A fuse in position 18 of the fuse box, on a B/W (black/white) wire.
- Which connector is the camshaft position sensor on this diagram?
- Connector C09, with pins 3, 2, and 1, wired with Bl/B, Bl/O, and O/Bl wires near the ECM.
- What components connect to the ignition coil in this diagram?
- The ignition coil (connector E17) connects to the distributor and to the igniter (power transistor, connector E18) on Br/W wires, with B/Bl and B/W feeds.
- What wire colors go to the heated oxygen sensor?
- The heated oxygen sensor (connector E19) uses B/W, Gr/Y, and B (ground) wires.
- What is connector E28 in this diagram?
- E28 is the power steering pressure switch, an OFF/ON switch with pin 1 to the circuit and a B wire to ground.
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