Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
100%
Stock ECU being replaced
KV8-B-1 Injection 1
KV8-D-9 EFI relay output (low side, 200 mA)
KV8-B-14 Aux 5
KV8-B-2 Injection 2
KV8-B-12 Aux 3
KV8-B-13 Aux 4
KV8-B-3 Injection 3
KV8-B-5 Injection 5
KV8-B-6 Injection 6
KV8-B-4 Injection 4
KV8-B-15 Aux 6
L no data
KV8-B-16 Aux 7
KV8-B-7 Injection 7
KV8-B-10 Aux 1
ISC valve +14V feed
KV8-B-11 Aux 2
KV8-B-8 Injection 8
OEM-2
Stock ECU being replaced
AInjector 1
BCooling fan relay
CCondenser fan relay
DInjector 2
EEGR valve
FEGR valve
GInjector 3
HEGR valve
IEGR valve
JInjector 4
KA/C clutch relay
L no data
MFuel pump relay
NVTCS solenoid (intake butterflies)
OFuel pump relay (non-immobiliser)
PISC valve +14V feed
QISC valve low side
RMalfunction indicator lamp (MIL)
GND
GND
KV8-B-18 Aux 9
E no data
KV8-B-26 Ignition 1
G no data
KV8-B-17 Aux 8
KV8-B-27 Ignition 2
KV8-A-10 Lambda 1 heater −
KV8-B-19 Aux 10
L no data
KV8-B-20 Aux 11
N no data
KV8-A-11 Lambda 2 heater −
R no data
KV8-C-28 Digital in 2
KV8-C-27 Digital in 1
KV8-B-21 Aux 12
KV8-D-6 Sync sensor +
W–X no data
KV8-D-4 Crank index sensor +
Z no data
OEM-3
Stock ECU being replaced
APower ground
BPower ground
CPurge solenoid valve
E no data
FIgnition 1 (coils 1+4, wasted spark)
G no data
HMain relay
IIgnition 2 (coils 2+3, wasted spark)
JFront O2 heater
KEVAP leak detection pump
L no data
MAlternator control
N no data
PRear O2 heater
R no data
SImmobiliser
TVehicle speed
UCharge lamp
VCam position (CMP)
W–X no data
YCrank position (CKP)
Z no data
GND
KV8-C-29 Digital in 3
KV8-C-30 Digital in 4
VVT oil-control solenoid +12V feed
KV8-C-31 Digital in 5
G no data
KV8-C-32 Digital in 6
KV8-C-33 Digital in 7
KV8-C-34 Digital in 8
K no data
5V ref
KV8-D-11 Knock 1 +
KV8-C-8 Analog in 7
0V sensor
KV8-C-7 Analog in 6
Q no data
KV8-B-23 Aux 14
KV8-D-15 Ignition switch input
U no data
KV8-C-4 Analog in 3
KV8-C-6 Analog in 5
KV8-C-2 Analog in 1
Y no data
KV8-C-5 Analog in 4
AB no data
KV8-C-9 Analog in 8
KV8-C-3 Analog in 2
ECU power +14V (main relay)
KV8-B-22 Aux 13
OEM-4
Stock ECU being replaced
APower ground
BBrake switch
CPower steering pressure switch
DVVT oil-control solenoid +12V feed
FA/C request
G no data
HNeutral switch
IClutch switch
JVTCS vacuum switch
K no data
L+5V sensor supply
MKnock sensor
NIntake air temperature (IAT)
OSignal ground
PCoolant temperature (ECT)
Q no data
RVVT oil-control solenoid (low-side control)
SIgnition switch (IG1) sense
U no data
VThrottle position (TPS)
WFront O2 signal
XMass air flow (MAF)
Y no data
AARear O2 signal
AB no data
ADFuel level
AEPressure sensor (Mazda: EGR boost sensor)
AFECU power +14V (main relay)
AHEVAP leak detection pump solenoid valve
KV8
KV8-A
KV8
10Lambda 1 heater −
11Lambda 2 heater −
OEM-3-J Front O2 heater
OEM-3-P Rear O2 heater
KV8-B
KV8
1Injection 1
2Injection 2
3Injection 3
4Injection 4
5Injection 5
6Injection 6
7Injection 7
8Injection 8
9ECU ground
10Aux 1
11Aux 2
12Aux 3
13Aux 4
14Aux 5
15Aux 6
16Aux 7
17Aux 8
18Aux 9
19Aux 10
20Aux 11
21Aux 12
22Aux 13
23Aux 14
26Ignition 1
27Ignition 2
34ECU ground
OEM-2-A Injector 1
OEM-2-D Injector 2
OEM-2-G Injector 3
OEM-2-J Injector 4
OEM-2-H EGR valve
OEM-2-I EGR valve
OEM-2-N VTCS solenoid (intake butterflies)
OEM-2-R Malfunction indicator lamp (MIL)
GND
OEM-2-O Fuel pump relay (non-immobiliser)
OEM-2-Q ISC valve low side
OEM-2-E EGR valve
OEM-2-F EGR valve
OEM-2-C Condenser fan relay
OEM-2-K A/C clutch relay
OEM-2-M Fuel pump relay
OEM-3-H Main relay
OEM-3-C Purge solenoid valve
OEM-3-K EVAP leak detection pump
OEM-3-M Alternator control
OEM-3-U Charge lamp
OEM-4-AH EVAP leak detection pump solenoid valve
OEM-4-R VVT oil-control solenoid (low-side control)
OEM-3-F Ignition 1 (coils 1+4, wasted spark)
OEM-3-I Ignition 2 (coils 2+3, wasted spark)
GND
KV8-C
KV8
1ECU ground
2Analog in 1
3Analog in 2
4Analog in 3
5Analog in 4
6Analog in 5
7Analog in 6
8Analog in 7
9Analog in 8
17Analog sensor 0V reference
25Analog sensor 0V reference
26ECU ground
27Digital in 1
28Digital in 2
29Digital in 3
30Digital in 4
31Digital in 5
32Digital in 6
33Digital in 7
34Digital in 8
GND
OEM-4-X Mass air flow (MAF)
OEM-4-AE Pressure sensor (Mazda: EGR boost sensor)
OEM-4-V Throttle position (TPS)
OEM-4-AA Rear O2 signal
OEM-4-W Front O2 signal
OEM-4-P Coolant temperature (ECT)
OEM-4-N Intake air temperature (IAT)
OEM-4-AD Fuel level
0V sensor
0V sensor
GND
OEM-3-T Vehicle speed
OEM-3-S Immobiliser
OEM-4-B Brake switch
OEM-4-C Power steering pressure switch
OEM-4-F A/C request
OEM-4-H Neutral switch
OEM-4-I Clutch switch
OEM-4-J VTCS vacuum switch
KV8-D
KV8
1ECU 14V supply
2Aux 13–16 14V supply
4Crank index sensor +
5Crank index sensor −
6Sync sensor +
7Sync sensor −
9EFI relay output (low side, 200 mA)
11Knock 1 +
15Ignition switch input
20Aux 9–12 14V supply
21Sensor supply Vref1 5.0V
ECU 14V supply
Aux 13–16 14V supply
OEM-3-Y Crank position (CKP)
OEM-4-O Signal ground (via SP-0V)
OEM-3-V Cam position (CMP)
OEM-4-O Signal ground (via SP-0V)
OEM-2-B Cooling fan relay
OEM-4-M Knock sensor
OEM-4-S Ignition switch (IG1) sense
Aux 9–12 14V supply
5V ref
SP-GND · 8 pins
SP-14V · 7 pins
SP-0V · 6 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
66 / 66 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
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