Which ECM pins are used in the ignition circuit?

The schematic shows ECM coupler pins A8 and A4. A8 connects via a brown (Br) wire toward the noise suppressor/coil circuit, and A4 connects via an orange (Or) wire to the igniter.

What wire colors are used in this ignition circuit?

Br (brown) from ECM pin A8, B/W (black/white) to the ignition coil, Br/W (brown/white) to the igniter, Or (orange) from ECM pin A4 to the igniter, and B (black) ground wires.

What terminals are on the igniter?

The igniter (power unit) block is labeled with IG1, COIL, and GND terminals, with the GND terminal wired to ground via a black (B) wire.

Where are pins A4 and A8 located?

The connector illustration on the right shows the ECM coupler with the A4 and A8 pin positions marked on the connector face.

Home/ Registry/ Suzuki/ Samurai/ 1986-1995/ “Little Blue”/ Photo supermotors.net/registry/media/420674

Suzuki Samurai Ignition Circuit Diagram - ECM, Igniter & Coil Wiring

Ignition system schematic: ECM coupler, noise suppressor, ignition coil and igniter with ECM connector pinout

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Schematic of the ignition system showing the ECM, noise suppressor, ignition coil and igniter with a numbered legend and ECM connector pinout.

AI caption August 2006 · Photo 43 of 86

This document is a scanned ignition circuit schematic showing the wiring between the ECM (Electronic Control Module) and the ignition system components. The legend identifies five components: (1) ECM, (2) ECM coupler, (3) noise suppressor, (4) ignition coil, and (5) igniter (power unit). The schematic shows ECM coupler terminal A8 connecting via a brown (Br) wire toward the noise suppressor, with a black/white (B/W) wire running to the ignition coil and a brown/white (Br/W) wire to the igniter. The igniter block has terminals labeled IG1, COIL, and GND, with a black (B) wire from GND to chassis ground. ECM terminal A4 connects to the igniter via an orange (Or) wire. The noise suppressor is grounded via a black (B) wire. A separate illustration on the right shows the physical ECM coupler (connector) with the locations of pins A4 and A8 identified. A reader can learn the wire colors, ECM pin assignments, and component interconnections for diagnosing the ignition/igniter circuit. The document itself is undated and does not state a vehicle model; the uploader filed it under a 1986 Suzuki Samurai.

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Frequently asked questions

Which ECM pins are used in the ignition circuit?: The schematic shows ECM coupler pins A8 and A4. A8 connects via a brown (Br) wire toward the noise suppressor/coil circuit, and A4 connects via an orange (Or) wire to the igniter.
What wire colors are used in this ignition circuit?: Br (brown) from ECM pin A8, B/W (black/white) to the ignition coil, Br/W (brown/white) to the igniter, Or (orange) from ECM pin A4 to the igniter, and B (black) ground wires.
What components make up this ignition circuit?: Per the legend: 1. ECM, 2. ECM coupler, 3. Noise suppressor, 4. Ignition coil, and 5. Igniter (Power unit).
What terminals are on the igniter?: The igniter (power unit) block is labeled with IG1, COIL, and GND terminals, with the GND terminal wired to ground via a black (B) wire.
Where are pins A4 and A8 located?: The connector illustration on the right shows the ECM coupler with the A4 and A8 pin positions marked on the connector face.