04 Wiring

Pin outside

Connector pinouts on the sensor or throttle body — MAP, temp, TPS, wideband, crank, and popular ETBs.

14 min readUpdated 2026-08

This page is the other end of the loom. Interactive pinout is Race Core. Pin outside is the plug on the sensor, throttle body or pedal — the part you are holding in the workshop.

Pin numbers below are looking into the part (the pins you can see on the sensor or ETB), not into the flying plug. Latch / tab orientation is noted where it matters. Motor polarity on a throttle can be inverted in software; 5 V and ground cannot.

Where it lands on Race Core

On the part	Race Core
+5 V (sensor)	5 V Sens 1 (C9 / C21 / C32) or Sens 2 (C10 / C22 / C33)
Sensor ground	Sensor GND on connector C — never a power ground
MAP signal	Analog Volt 1 (default)
TPS 1 / cable TPS	Analog Volt 2
TPS 2 (ETB redundant)	Analog Volt 4, on the other 5 V rail
Pedal 1 / Pedal 2	Analog Volt 3 and a spare AV, split across Sens 1 and Sens 2
CLT / IAT	Analog Temp 4 / Analog Temp 2
ETB motor + / −	ETB 1+ (B15) / ETB 1− (B8)
Hall signal	Digital 1 (crank) or a spare digital (cam, VSS, flex)
VR crank	VR 1+ / VR 1−
Knock	Knock input

MAP sensors

Part	Pin	Function
GM 1 / 2 / 3 bar (16137039 / 16040609 / 12223861). Latch up, pins A–C	A	Sensor ground
	B	MAP signal
	C	+5 V
Bosch 3-wire MAP (0 261 230 xxx, 1–4 bar). Pin 1 at the latch end	1	+5 V
	2	Sensor ground
	3	MAP signal
AEM 3.5 bar 30-2130-50 (and similar AEM brass 3-wire)	Red	+5 V
	Black	Sensor ground
	White / green	MAP signal 0.5–4.5 V

GM 1-bar tops out at atmosphere. A turbo car wants 2-bar (~1 bar boost) or 3-bar (~2 bar boost). Select the matching calibration in TunerStudio — a 3-bar sensor on a 1-bar curve reads half the boost you actually have.

CLT and IAT (2-wire NTC)

Polarity does not matter. One pin to the analog-temp input, the other to sensor ground. The pull-up is inside Race Core.

Sensor	Connector	Notes
GM open-element IAT (12160855 / 25036751)	2-pin Metri-Pack	Fast. Hang in the intake pipe, not in a stagnant pocket.
GM CLT (in thermostat housing)	2-pin	Brass body, NTC. Use the GM curve.
Bosch IAT / CLT (0 280 130 xxx)	2-pin Superseal / Junior timer	Bosch NTC curve. Common on VAG and aftermarket weld-in bungs.
Nissan CLT (SR / RB / VQ)	2-pin	Nissan curve. Do not load a GM table on it.
Toyota CLT (1JZ / 2JZ / 4A-GE)	2-pin	Toyota NTC. Same rule — own curve.
Honda CLT / IAT (K / B / D)	2-pin	Honda curve. IAT often in the airbox.
BMW M50 / M54 CLT	2-pin round	BMW NTC. Often a second sensor for the cluster — that one is not yours.

Cable throttle TPS (3-wire)

Part	Pin	Function
Bosch 3-wire TPS (0 280 122 xxx). Pin 1 nearest the indexing slot	1	+5 V
	2	TPS signal
	3	Sensor ground
GM 3-wire TPS (LS cable, TBI, Vortec)	A	Sensor ground
	B	TPS signal
	C	+5 V
Nissan 4-wire TPS (S13/S14/S15, RB, SR). Pin 1 at the latch	1	Sensor ground (E2)
	2	Idle switch — leave unused on Race Core
	3	TPS signal (VTA)
	4	+5 V (VC)
Toyota 4-wire TPS (1JZ/2JZ cable, 4A-GE)	E2	Sensor ground
	IDL	Idle switch — unused
	VTA	TPS signal
	VC	+5 V

Closed voltage is usually 0.4–0.8 V, WOT 3.8–4.7 V. A cable TPS that reads 3–4 % with slack in the cable is normal — do not chase 0.00 %.

Accelerator pedals (drive-by-wire)

A pedal is two independent 0–5 V sensors. Feed them from two different 5 V rails (Sens 1 and Sens 2) so a shorted rail cannot lie about both. Typical closed pair is ~0.8 V / ~0.4 V, WOT ~3.8 V / ~1.9 V (one sensor is often half-scale).

Pedal	Pins	Function
Bosch 6-pin APP (VAG / common aftermarket)	1 / 2 / 3	APS 1: +5 V, signal, ground (Sens 1)
	4 / 5 / 6	APS 2: +5 V, signal, ground (Sens 2)
GM LS / truck 6-pin APP	A / B / C	APS 1: 5 V, signal, ground
	D / E / F	APS 2: 5 V, signal, ground
Nissan VQ / VR 6-pin APP	1–3 / 4–6	Same split: bank 1 then bank 2. Confirm 5 V vs ground with a meter — Nissan colours are not Bosch colours.

Electronic throttle bodies

Six pins is the usual motorsport pattern: motor +, motor −, +5 V, sensor ground, TPS 1, TPS 2. Race Core: motor on B15 / B8. TPS 1 on AV 2 (Sens 1). TPS 2 on AV 4 (Sens 2). If the blade drives the wrong way, swap the two motor wires.

Bosch / VAG

Body	Pin	Function
Bosch 0 280 750 473 / 474 / 156 (Volvo, 68–82 mm). Same family as many 32 mm motorsport 0 280 750 148 bodies	1	Motor − → B8
	2	Sensor ground
	3	+5 V
	4	Motor + → B15
	5	TPS 2
	6	TPS 1
Audi S3 / A4 Bosch 0 280 750 009 (and RS6 077133062)	1	TPS 1
	2	Sensor ground
	3	Motor −
	4	TPS 2
	5	Motor +
	6	+5 V

GM LS

Body	Pin	Function
LS2 / LS3 / LS7 90 mm analog (12570790, 12605109 and clones). Letters A–F, latch at A	A	Motor −
	B	Motor +
	C	Sensor ground
	D	TPS 1
	E	+5 V
	F	TPS 2
Early Gen III 8-pin DBW	—	Same six functions plus two unused / identification pins. Use an 8-to-6 adapter or ignore the extras. Confirm with a meter.

Nissan, Toyota, Honda, Mitsubishi, Subaru

Body	Pin	Function
Nissan VQ35 / VQ37 / VR38 6-pin (350Z, G35, 370Z). Also typical Honda K (8th-gen Civic Si / TSX) and Evo X	1	Motor +
	2	Motor −
	3	Sensor ground
	4	TPS 1 (main)
	5	+5 V
	6	TPS 2 (backup)
Subaru Impreza 08–14 6-pin	1	Motor +
	2	Motor −
	3	TPS 2
	4	+5 V
	5	Sensor ground
	6	TPS 1
Toyota ETCS-i (1JZ-GTE VVTi, 2JZ-GTE VVTi, UZ)	—	Motor pair is still two pins at ~few ohms. Remaining pins are 5 V, GND, TPS 1, TPS 2. Some early ETCS-i bodies add a magnetic clutch — that pin is not a motor. Do not put the clutch on the H-bridge.

Ford, BMW, Chrysler

Body	Pin	Function
Ford Coyote 5.0 2011–2014 6-pin	1	Motor +
	2	Motor −
	3	TPS 1
	4	Sensor ground
	5	+5 V
	6	TPS 2
Ford Barra FG / FGX 8R29-9F991-AA	1	Motor −
	2	Motor +
	3	TPS 2
	4	Sensor ground
	5	+5 V
	6	TPS 1
BMW M54 / VDO 408-242-002-008Z	1	TPS 1
	2	+5 V
	3	Motor +
	4	TPS 2
	5	Motor −
	6	Sensor ground
Chrysler / Mopar 80 mm 53032801AC	1	TPS 1
	2	Sensor ground
	3	Motor +
	4	TPS 2
	5	Motor −
	6	+5 V

Crank and cam

Sensor	Pins	Race Core
2-wire VR (Bosch 60-2, Ford 36-1, many aftermarket)	+ / − (shield optional)	VR 1+ / VR 1−. If the composite log is inverted, swap the pair.
3-wire Hall crank / cam	+5 V or +12 V, signal, ground	Digital 1 (crank) or a spare digital (cam). Supply from 5 V Sens or +12 V MR — match the sensor.
GM 24× / 58× Hall (LS)	5 V, signal, ground (some 3× 24x use a 3-pin)	Hall, not VR. 24x and 58x are different trigger modes.
Nissan CAS (RB / SR / CA optical, 4-pin)	12 V, ground, 360° signal, 1°/cylinder signal	Two Hall/digital inputs. This is not a VR sensor. Use the Nissan CAS trigger mode.
Honda 12+1 crank (K / B)	3-wire Hall	Digital crank. Cam is a separate 3-wire Hall on a digital input.
Toyota 12+1 / 36-2 NE + G	NE = crank, G = cam, often 2- or 3-wire	NE to crank, G to cam. Confirm VR vs Hall on the specific JZ/UZ/G engine.

Wideband O2

Race Core does not drive an LSU heater and pump cell itself. Wire the sensor to a controller (AEM, rusEFI, Spartan, Innovate, CAN wideband), then bring analog 0–5 V or CAN into Race Core. The LSU pinout below is for the controller side.

Part	Pin	Function
Bosch LSU 4.9 (6-pin, looking into sensor)	1	Pump current (APE / IP)
	2	Virtual ground (IPN / VM)
	3	Heater − (H−)
	4	Heater + (H+)
	5	Trim resistor (RT / IA)
	6	Nernst (UN / RE)
Bosch LSU 4.2 (6-pin)	—	Same six roles, different housing key. Do not mix 4.2 and 4.9 on a controller set for the other.
AEM X-Series / analog controller output	Red	+12 V (fused, main-relay)
	Black	Ground
	White	Analog 0–5 V AFR → a spare AV. Calibrate 0.5 V / 4.5 V to the controller’s published AFR.

Knock and flex fuel

Part	Pins	Race Core
Bosch / GM resonant knock (2-wire)	Signal / sensor ground (shield the pair)	Knock input. Drain the shield at the ECU only.
GM 1-wire knock (LS, body is ground)	Signal; case grounds to the block	Works if the block is the sensor ground. Still shield the signal.
GM / Continental flex-fuel (3-pin Delphi). Latch up A–C	A / 1	+12 V switched (main-relay, fused ~5 A)
	B / 2	Ground
	C / 3	Frequency signal → a digital input. ~50 Hz = petrol, ~150 Hz = E100. Temperature is often a PWM on the same wire — enable the firmware’s flex decoder.

Pressure, idle valves, boost solenoid, VSS

Part	Pins	Race Core
Honeywell / SSI / AEM 0.5–4.5 V oil or fuel pressure (3-wire)	+5 V, ground, signal	Spare AV. 0.5 V = 0 psi, 4.5 V = full scale (50 / 100 / 150 psi — use the sensor’s range).
Bosch 2-wire PWM idle (0 280 140 / 142 xxx)	Pin 1 +12 V MR, pin 2 low-side	Low-side (often LS 11). Frequency 100–300 Hz. Polarity of the coil does not matter.
Toyota 3-wire IAC	+12 V and two windings	Not a simple PWM. Prefer a 2-wire Bosch valve on a standalone.
GM unipolar 4-coil stepper idle	4–6 wires	Not supported on the H-bridge. Use ETB idle or a 2-wire PWM valve.
MAC 3-port boost solenoid (35A-AAA-DDBA-1BA and clones)	Two coil pins, 12 V / low-side	Low-side (often LS 9). 25–50 Hz. One port to manifold, one to wastegate top, one to atmosphere — plumbing is the tune.
GM Hall VSS / trans speed (2- or 3-wire)	12 V or 5 V, signal, ground	Digital input. Pulses per kilometre must be calibrated.
Acewell ACUK-SGPS (GPS speed, 12 V pulse)	+12 V, ground, pulse out	Digital input. 5 000 pulses/km typical — set that in the VSS decoder.