Difference between revisions of "Vehicle:Mazda Miata 1994"

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[[Manual:Hardware:Mazda_PnP]]
 
[[Manual:Hardware:Mazda_PnP]]
  
 +
[https://docs.google.com/spreadsheets/d/1LTvS7I-128Hft9uXHG1JrBxetVjGJDSBkySgVDQ6MGk Frankenso options]
 +
 +
ECU pin-out seems to be very similar to https://rusefi.com/wiki/index.php?title=Vehicle:Mazda_Miata_1990 with few exceptions:
 +
 +
1) dedicated MAF ground
 +
 +
2) individual injector wiring
 +
 +
[http://rusefi.com/images/Frankenso/frankenso_set_for_miata_1994.jpg frankenso_set_for_miata_1994.jpg]
 +
 +
[http://rusefi.com/images/Frankenso/frankenso_set_for_miata_1994_back.jpg frankenso_set_for_miata_1994_back.jpg]
  
 
== Plug 1 ==
 
== Plug 1 ==
Line 38: Line 49:
 
|  
 
|  
 
| YEL/BLK
 
| YEL/BLK
|  
+
| Check Engine Light
 
|  
 
|  
 
|-  
 
|-  
Line 44: Line 55:
 
| *
 
| *
 
| *
 
| *
| *
+
| * Extra analog input (WB O2?)
|  
+
| Extra Input
 
|-  
 
|-  
 
| 1G
 
| 1G
|  
+
| W7 0Ohm
 
| BRN/YEL
 
| BRN/YEL
 
| Coil Pack Cylinder 1&4
 
| Coil Pack Cylinder 1&4
Line 54: Line 65:
 
|-  
 
|-  
 
| 1H
 
| 1H
|  
+
| W8 0Ohm
 
| BRN
 
| BRN
 
| Coil Pack Cylinder 2&3
 
| Coil Pack Cylinder 2&3
Line 68: Line 79:
 
|  
 
|  
 
| BLU/BLK
 
| BLU/BLK
| AC Relay
+
| A/C Compressor Relay
 
|  
 
|  
 
|-  
 
|-  
Line 81: Line 92:
 
| BLK/GRN
 
| BLK/GRN
 
| Coolant Fan Relay
 
| Coolant Fan Relay
|  
+
| Output, low-side
 
|-  
 
|-  
 
| 1M
 
| 1M
 
|  
 
|  
 
| GRN/RED
 
| GRN/RED
|  
+
| Vehicle Speed Sensor
|  
+
| Input
 
|-  
 
|-  
 
| 1N
 
| 1N
Line 157: Line 168:
 
|  
 
|  
 
| BLK
 
| BLK
| Ground
+
| Pwr Ground
 
| Ground
 
| Ground
 
|-  
 
|-  
Line 163: Line 174:
 
|  
 
|  
 
| BLK
 
| BLK
| Ground
+
| Pwr Ground
 
| Ground
 
| Ground
 
|-  
 
|-  
Line 169: Line 180:
 
|  
 
|  
 
| BLK/LT GRN
 
| BLK/LT GRN
| Ground
+
| Logic Ground
 
| Ground  
 
| Ground  
 
|-  
 
|-  
Line 175: Line 186:
 
|  
 
|  
 
| BLK/BLU
 
| BLK/BLU
|  
+
| Logic Ground
|  
+
| Ground
 
|-  
 
|-  
 
| 2E
 
| 2E
|  
+
| W43 0Ohm
 
| WHT
 
| WHT
 
| Crank angle #1 CKP
 
| Crank angle #1 CKP
Line 187: Line 198:
 
|  
 
|  
 
| BLK/RED
 
| BLK/RED
| (Maybe BLK/LT GRN later in loom)
+
| MAF signal ground
|  
+
| Ground
 
|-  
 
|-  
 
| 2G
 
| 2G
|  
+
| W45 0Ohm
 
| YEL/BLU
 
| YEL/BLU
 
| Crank angle #2
 
| Crank angle #2
Line 205: Line 216:
 
|  
 
|  
 
| BLK/WHT
 
| BLK/WHT
| Instrument Cluster (Tacho)+Coil Packs+Data Link Connector
+
| tacho signal
|  
+
| Input
 
|-  
 
|-  
 
| 2J
 
| 2J
 
|  
 
|  
 
| LT GRN/RED
 
| LT GRN/RED
|  
+
| EGR Function Sensor
|  
+
| Input
 
|-  
 
|-  
 
| 2K
 
| 2K
|  
+
| W49 0Ohm
 
| LT GRN/WHT
 
| LT GRN/WHT
 
| +5 ref/TPS power
 
| +5 ref/TPS power
Line 223: Line 234:
 
|  
 
|  
 
| BLU/RED
 
| BLU/RED
|  
+
| Rear Defroster relay
 
|  
 
|  
 
|-  
 
|-  
 
| 2M
 
| 2M
|  
+
| W51 0Ohm
 
| RED/BLK
 
| RED/BLK
| +Powertrain Control Module (Transmission)
+
| throttle position sensor
 
|  
 
|  
 
|-  
 
|-  
 
| 2N
 
| 2N
|  
+
| W52 0Ohm
 
| RED/BLU
 
| RED/BLU
|  
+
| heated O2 sensor
 
|  
 
|  
 
|-  
 
|-  
 
| 2O
 
| 2O
|  
+
| W53 0Ohm
 
| RED
 
| RED
 
| MAF signal
 
| MAF signal
Line 245: Line 256:
 
|-  
 
|-  
 
| 2P
 
| 2P
|  
+
| W54 0Ohm
 
| RED/BLK
 
| RED/BLK
|  
+
| intake air thermosensor
|  
+
| analog input
 
|-  
 
|-  
 
| 2Q
 
| 2Q
 
|  
 
|  
 
| BLU/WHT
 
| BLU/WHT
|  
+
| Coolant thermosensor
 
|  
 
|  
 
|-  
 
|-  
Line 259: Line 270:
 
|  
 
|  
 
| YEL/GRN
 
| YEL/GRN
|  
+
| Pressure regulator solenoid
|  
+
| Output/low side (?)
 
|-  
 
|-  
 
| 2S
 
| 2S
Line 266: Line 277:
 
| BLU/WHT
 
| BLU/WHT
 
| Condenser Fan Relay
 
| Condenser Fan Relay
|  
+
| Output/low side (?)
 
|-  
 
|-  
 
| 2T
 
| 2T
|  
+
| W58 0Ohm
 
| LT GRN
 
| LT GRN
| Fuel Pump+Data Link Connector
+
| Fuel Pump relay
|  
+
| Output/low side
 
|-  
 
|-  
 
| 2U
 
| 2U
|  
+
| W59
 
| YEL
 
| YEL
 
| Injector #1
 
| Injector #1
Line 281: Line 292:
 
|-  
 
|-  
 
| 2V
 
| 2V
|  
+
| W60 0Ohm
 
| YEL/BLK
 
| YEL/BLK
 
| Injector #2
 
| Injector #2
Line 287: Line 298:
 
|-  
 
|-  
 
| 2W
 
| 2W
|  
+
| W61 0Ohm
 
| BLU/ORG
 
| BLU/ORG
|  
+
| idle valve control
|  
+
| Output/low side
 
|-  
 
|-  
 
| 2X
 
| 2X
|  
+
| W62
 
| YEL/RED
 
| YEL/RED
| XRef 26
+
| purge solenoid
|  
+
| Output/low side
 
|  
 
|  
 
|-  
 
|-  
 
| 2Y
 
| 2Y
|  
+
| W63 0Ohm
 
| GRN/WHT
 
| GRN/WHT
 
| Injector #3
 
| Injector #3
Line 306: Line 317:
 
|-  
 
|-  
 
| 2Z
 
| 2Z
|  
+
| W64 0Ohm
 
| GRN
 
| GRN
 
| Injector #4
 
| Injector #4
Line 319: Line 330:
 
[[File:1994_miata_1.8_2.png]]
 
[[File:1994_miata_1.8_2.png]]
 
[[File:1994_miata_1.8_3.png]]
 
[[File:1994_miata_1.8_3.png]]
[[File:1994_miata_1.8_4.png]]
+
 
 +
[[File:1994_miata_1.8_charging.png]]
 +
 
 +
== CAS ==
 +
Source: http://www.rivercityroad.com/garage/cas.htm
 +
The CAS has four wires. Two are for +12 power and ground. The other two are the output signals read by the engine computer.
 +
 
 +
The signals are called SGC and SGT on the 1.8 engine. They are called called NE and G signals on the 1.6 engine. The computer can decode the position of the engine camshaft and the engine speed from these two signals. With this information, it calculates when to send spark to the spark plugs and fuel to the fuel injectors.
 +
 
 +
[[File:miata_cas_signals.jpg]]
 +
 
 +
[[File:miata_cas_wires.jpg]]

Latest revision as of 15:57, 14 September 2019

Manual:Hardware:Mazda_PnP

Frankenso options

ECU pin-out seems to be very similar to https://rusefi.com/wiki/index.php?title=Vehicle:Mazda_Miata_1990 with few exceptions:

1) dedicated MAF ground

2) individual injector wiring

frankenso_set_for_miata_1994.jpg

frankenso_set_for_miata_1994_back.jpg

Plug 1

22 pin

pos b pos color desc type
1A BLU/RED Hot at all times. Room Fuse. Input +12v
1B WHT/RED Main relay Input +12v
1C VIO
1D WHT/GRN Data Link Connector
1E YEL/BLK Check Engine Light
1F * * * Extra analog input (WB O2?) Extra Input
1G W7 0Ohm BRN/YEL Coil Pack Cylinder 1&4 Output
1H W8 0Ohm BRN Coil Pack Cylinder 2&3 Output
1I BLU/WHT Powertrain Control Module (Transmission)
1J BLU/BLK A/C Compressor Relay
1K BLK J/C? (M/T Only)
1L BLK/GRN Coolant Fan Relay Output, low-side
1M GRN/RED Vehicle Speed Sensor Input
1N RED Powertrain Control Module (Transmission)
1O GRN/BLK stop light switch Input
1P BLU/YEL
1Q LT GRN/BLK AC Pressure Switch
1R YEL/BLK
1S BLU/ORG Heater Control Unit
1T YEL/RED
1U RED/BLK
1V BRN/WHT Powertrain Control Module (Transmission) & Clutch Switch

Plug 2

26 pin

pos b pos color desc type
2A BLK Pwr Ground Ground
2B BLK Pwr Ground Ground
2C BLK/LT GRN Logic Ground Ground
2D BLK/BLU Logic Ground Ground
2E W43 0Ohm WHT Crank angle #1 CKP Input, four times
2F BLK/RED MAF signal ground Ground
2G W45 0Ohm YEL/BLU Crank angle #2
2H LT GRN/YEL Data Link Connector
2I BLK/WHT tacho signal Input
2J LT GRN/RED EGR Function Sensor Input
2K W49 0Ohm LT GRN/WHT +5 ref/TPS power Output 5v
2L BLU/RED Rear Defroster relay
2M W51 0Ohm RED/BLK throttle position sensor
2N W52 0Ohm RED/BLU heated O2 sensor
2O W53 0Ohm RED MAF signal analog input
2P W54 0Ohm RED/BLK intake air thermosensor analog input
2Q BLU/WHT Coolant thermosensor
2R YEL/GRN Pressure regulator solenoid Output/low side (?)
2S BLU/WHT Condenser Fan Relay Output/low side (?)
2T W58 0Ohm LT GRN Fuel Pump relay Output/low side
2U W59 YEL Injector #1 Output/low side
2V W60 0Ohm YEL/BLK Injector #2 Output/low side
2W W61 0Ohm BLU/ORG idle valve control Output/low side
2X W62 YEL/RED purge solenoid Output/low side
2Y W63 0Ohm GRN/WHT Injector #3 Output/low side
2Z W64 0Ohm GRN Injector #4 Output/low side

Diagram

http://www.miataforumz.com/1990-200-Miata-Wiring/94sys.pdf


1994 miata 1.8 1.png 1994 miata 1.8 2.png 1994 miata 1.8 3.png

1994 miata 1.8 charging.png

CAS

Source: http://www.rivercityroad.com/garage/cas.htm The CAS has four wires. Two are for +12 power and ground. The other two are the output signals read by the engine computer.

The signals are called SGC and SGT on the 1.8 engine. They are called called NE and G signals on the 1.6 engine. The computer can decode the position of the engine camshaft and the engine speed from these two signals. With this information, it calculates when to send spark to the spark plugs and fuel to the fuel injectors.

Miata cas signals.jpg

Miata cas wires.jpg