Applications Honda D16
Draft. Trigger offset has not been confirmed on a running Race Core install. Pins marked TBD are unknown — do not guess them. A wrong decoder or firing order can destroy the engine.
Honda D16
1.6 L SOHC Civic engine. D16A6 is non-VTEC. D16Z6 and D16Y8 are VTEC. Distributor with an internal coil on the common OBD1 and OBD2 cars. High-impedance injectors, cable throttle. There is no D-series decoder in the rusEFI trigger list this note was checked against. The Honda K 12-1 mode is a different engine — do not select it.
Recommended: F7, V4 or Micro Core after a 36-1 conversion, or once a distributor log has been turned into a real decoder. Four high-Z injectors. VTEC is one solenoid on the Z6/Y8 only.
Status: draft. Trigger offset has not been confirmed on a running Race Core install.
- Cylinders: 4
- Displacement: 1590–1595 cc
- Firing order: 1-3-4-2
- Orientation: Cylinder 1 at the timing-belt end. Firing order 1-3-4-2.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| D16A6 | 1988–1991 class | Distributor | Non-VTEC. DPFI or MPFI by year. Cable. |
| D16Z6 / D16Y8 | 1992–2000 | Distributor | VTEC. High-Z. OBD1 and OBD2 distributor plugs are not the same — OEM ECU pinouts are TBD. |
Recommended pin assignment (Race Core F7)
Pins below are the library default Race Core F7 map — the same AMPSEAL landings as the verified 1UZ-FE, 2JZ-GTE and LS1 notes. Core EFI V4 and Micro Core cavity numbers are TBD. If a pin is not in this table, it is TBD. Do not guess a spare.
| Pin | TunerStudio | Function |
|---|---|---|
| B10 | Digital 1 | Crank Hall |
| B1 | Digital 2 | Cam Hall |
| A3 | Lowside 1 | Injector cylinder 1 |
| A15 | Lowside 2 | Injector cylinder 2 |
| A4 | Lowside 3 | Injector cylinder 3 |
| A16 | Lowside 4 | Injector cylinder 4 |
| A35 | Ign 1 | Cyl 1 logic coil |
| A34 | Ign 2 | Cyl 2 logic coil |
| A22 | Ign 3 | Cyl 3 logic coil |
| A33 | Ign 4 | Cyl 4 logic coil |
| A1 | Highside 2 | VTEC solenoid, VTEC heads only, on/off |
| C20 | Analog Temp 3 | CLT |
| C30 | Analog Temp 2 | IAT |
| C13 | Analog Volt 1 | MAP 0–5 V |
| C24 | Analog Volt 2 | TPS 1 |
| C34 | Knock 1 | Knock |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| B17 / B16 | CAN 1 H / L | Dash / wideband |
| B18 | Battery Sense | Ignition-switched 12 V (5 A fuse) |
| B23 | +12 V MR | Main-relay 12 V into ECU |
| A17 A18 A24 B14 B19 B20 | Power GND | Engine block → battery − |
| C9 / C21 / C32 | 5 V Sens 1 | MAP, TPS, pedal 1 |
| C1–C8, C29, C31 | Sensor GND | 0–5 V and thermistor returns |
Trigger
Do not select HONDA_K_CRANK_12_1. That is the K-series note. A D-series distributor needs a log or a 36-1 crank wheel.
Crank
| Factory | Distributor. Unsupported as a named mode. |
| Conversion | 36-1 Hall on Digital 1 or VR on VR 1. |
Cam
| Sequential | Digital 2 after the conversion. VTEC does not provide phase. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 36-1 + cam. Not Honda K 12-1 |
| Use only rising edge | VR: typically yes on MAX992x. Hall: as logged |
| Invert primary | No — swap VR wires first |
| Firing order | 1-3-4-2 |
Offset: Light on cylinder 1 at the belt.
Injection
High-Z, around the low teens of ohms on the common saturated D-series injectors. Meter. Four sequential after cam sync. OBD1 DPFI cars are batched from the factory.
| Impedance | High-Z. No low-Z drivers required on a stock D16. |
Ignition
Internal distributor coil is dumb. Ign 1 feeds an igniter, or you convert to COP / a wasted-spark pack with igniters. Distributor module pin is TBD. Logic COP dwell 2.0–2.5 ms.
| OBD1 vs OBD2 | The Honda ECU plug changed. This library does not publish that plug. |
Idle
2-wire idle air valve, often a fast idle and a purge sharing the bay. Idle driver pin TBD. VTEC solenoid is Highside 2, 12 V, on/off, only on VTEC heads. Non-VTEC engines leave that output empty.
First start
- Load the matching variant configuration in TunerStudio before the harness is live — injectors and coils stay disconnected until the decoder is confirmed.
- Fuel pump fuse out. Coils unplugged or spark outputs disabled. Crank. Open Diagnostics → composite / high-speed logger.
- Confirm crank teeth are even, the missing-tooth (or named pattern) is a single clean gap, and cam is one pulse per two crank revolutions for sequential four-stroke.
- RPM during cranking should sit in the 150–350 rpm band. 0 rpm or 12,000 rpm means the decoder is lost — polarity or wheel type, not offset.
- Lock timing to a fixed 10° (idle control off). Timing light on cylinder 1. Change trigger offset until the damper agrees with 10°.
- Recheck at ~3,000 rpm. If timing walks with RPM, it is VR polarity, a delayed Hall, or the wrong decoder — not offset.
- Enable spark. Confirm a healthy burn (timing light or plug colour) with fuel still disabled.
- Enable fuel. Prime, then crank. Catch the first idle on a rich-safe VE, then lean toward stoich at idle.
- Only then enable closed-loop idle, VVT, boost and traction. A base map is a starting point, not a dyno tune.
A base map is a starting point, not a dyno tune.