Difference between revisions of "Vehicle:Mazda Miata 1994"

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Line 1: Line 1:
 +
[[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 12: Line 25:
 
|  
 
|  
 
| BLU/RED
 
| BLU/RED
|
 
 
| Hot at all times. Room Fuse.
 
| Hot at all times. Room Fuse.
|  
+
| Input +12v
 
|-  
 
|-  
 
| 1B
 
| 1B
 
|  
 
|  
 
| WHT/RED
 
| WHT/RED
|  
+
| Main relay
|  
+
| Input +12v
|
 
 
|-  
 
|-  
 
| 1C
 
| 1C
 
|  
 
|  
 
| VIO
 
| VIO
| XRef 1
 
 
|  
 
|  
 
|  
 
|  
Line 33: Line 43:
 
|  
 
|  
 
| WHT/GRN
 
| WHT/GRN
|
 
 
| Data Link Connector
 
| Data Link Connector
 
|  
 
|  
Line 40: Line 49:
 
|  
 
|  
 
| YEL/BLK
 
| YEL/BLK
| XRef 3
+
| Check Engine Light
|
 
 
|  
 
|  
 
|-  
 
|-  
 
| 1F
 
| 1F
|  
+
| *
| Empty
+
| *
|
+
| * 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
|  
+
| Output
 
|-  
 
|-  
 
| 1H
 
| 1H
|  
+
| W8 0Ohm
 
| BRN
 
| BRN
|
 
 
| Coil Pack Cylinder 2&3
 
| Coil Pack Cylinder 2&3
|  
+
| Output
 
|-  
 
|-  
 
| 1I
 
| 1I
 
|  
 
|  
 
| BLU/WHT
 
| BLU/WHT
|
 
 
| Powertrain Control Module (Transmission)
 
| Powertrain Control Module (Transmission)
 
|  
 
|  
Line 75: Line 79:
 
|  
 
|  
 
| BLU/BLK
 
| BLU/BLK
|  
+
| A/C Compressor Relay
| AC Relay
 
 
|  
 
|  
 
|-  
 
|-  
Line 82: Line 85:
 
|  
 
|  
 
| BLK
 
| BLK
|
 
 
| J/C? (M/T Only)
 
| J/C? (M/T Only)
 
|  
 
|  
Line 89: Line 91:
 
|  
 
|  
 
| BLK/GRN
 
| BLK/GRN
|
 
 
| Coolant Fan Relay
 
| Coolant Fan Relay
|  
+
| Output, low-side
 
|-  
 
|-  
 
| 1M
 
| 1M
 
|  
 
|  
 
| GRN/RED
 
| GRN/RED
| XRef 4
+
| Vehicle Speed Sensor
|
+
| Input
|  
 
 
|-  
 
|-  
 
| 1N
 
| 1N
 
|  
 
|  
 
| RED
 
| RED
| XRef 5
 
 
| Powertrain Control Module (Transmission)
 
| Powertrain Control Module (Transmission)
 
|  
 
|  
Line 110: Line 109:
 
|  
 
|  
 
| GRN/BLK
 
| GRN/BLK
| XRef 6
+
| stop light switch
| (Maybe GRN only later in loom)
+
| Input
|  
 
 
|-  
 
|-  
 
| 1P
 
| 1P
 
|  
 
|  
 
| BLU/YEL
 
| BLU/YEL
| XRef 7
 
 
|  
 
|  
 
|  
 
|  
Line 124: Line 121:
 
|  
 
|  
 
| LT GRN/BLK
 
| LT GRN/BLK
|
 
 
| AC Pressure Switch
 
| AC Pressure Switch
 
|  
 
|  
Line 131: Line 127:
 
|  
 
|  
 
| YEL/BLK
 
| YEL/BLK
| XRef 8
 
 
|  
 
|  
 
|  
 
|  
Line 138: Line 133:
 
|  
 
|  
 
| BLU/ORG
 
| BLU/ORG
|
 
 
| Heater Control Unit
 
| Heater Control Unit
 
|  
 
|  
Line 145: Line 139:
 
|  
 
|  
 
| YEL/RED
 
| YEL/RED
| XRef 9
 
 
|  
 
|  
 
|  
 
|  
Line 152: Line 145:
 
|  
 
|  
 
| RED/BLK
 
| RED/BLK
| XRef 10
 
 
|  
 
|  
 
|  
 
|  
Line 159: Line 151:
 
|  
 
|  
 
| BRN/WHT
 
| BRN/WHT
|
 
 
| Powertrain Control Module (Transmission) & Clutch Switch
 
| Powertrain Control Module (Transmission) & Clutch Switch
 
|  
 
|  
Line 168: Line 159:
 
26 pin
 
26 pin
 
{| cellpadding="3" aligh="right" border="1" style="border-collapse:collapse;"
 
{| cellpadding="3" aligh="right" border="1" style="border-collapse:collapse;"
 +
| pos
 +
| b pos
 +
| color
 +
| desc
 +
| type
 +
|-
 
| 2A
 
| 2A
 
|  
 
|  
 
| BLK
 
| BLK
|  
+
| Pwr Ground
| Ground
 
 
| Ground
 
| Ground
 
|-  
 
|-  
Line 178: Line 174:
 
|  
 
|  
 
| BLK
 
| BLK
|  
+
| Pwr Ground
| Ground
 
 
| Ground
 
| Ground
 
|-  
 
|-  
Line 185: Line 180:
 
|  
 
|  
 
| BLK/LT GRN
 
| BLK/LT GRN
|  
+
| Logic Ground
| G115? Rear of Engine & J/C
+
| Ground
|
 
 
|-  
 
|-  
 
| 2D
 
| 2D
 
|  
 
|  
 
| BLK/BLU
 
| BLK/BLU
| XRef 11
+
| Logic Ground
|
+
| Ground
|  
 
 
|-  
 
|-  
 
| 2E
 
| 2E
|  
+
| W43 0Ohm
 
| WHT
 
| WHT
| XRef 12
+
| Crank angle #1 CKP
|
+
| Input, four times
|  
 
 
|-  
 
|-  
 
| 2F
 
| 2F
 
|  
 
|  
 
| BLK/RED
 
| BLK/RED
| XRef 13
+
| MAF signal ground
| (Maybe BLK/LT GRN later in loom)
+
| Ground
|  
 
 
|-  
 
|-  
 
| 2G
 
| 2G
|  
+
| W45 0Ohm
 
| YEL/BLU
 
| YEL/BLU
| XRef 14
+
| Crank angle #2
|
 
 
|  
 
|  
 
|-  
 
|-  
Line 220: Line 210:
 
|  
 
|  
 
| LT GRN/YEL
 
| LT GRN/YEL
|
 
 
| Data Link Connector
 
| Data Link Connector
 
|  
 
|  
Line 227: Line 216:
 
|  
 
|  
 
| BLK/WHT
 
| BLK/WHT
|  
+
| tacho signal
| Instrument Cluster (Tacho)+Coil Packs+Data Link Connector
+
| Input
|
 
 
|-  
 
|-  
 
| 2J
 
| 2J
 
|  
 
|  
 
| LT GRN/RED
 
| LT GRN/RED
| XRef 15
+
| EGR Function Sensor
|
+
| Input
|  
 
 
|-  
 
|-  
 
| 2K
 
| 2K
|  
+
| W49 0Ohm
 
| LT GRN/WHT
 
| LT GRN/WHT
| XRef 16
+
| +5 ref/TPS power
| +Powertrain Control Module (Transmission)
+
| Output 5v
|  
 
 
|-  
 
|-  
 
| 2L
 
| 2L
 
|  
 
|  
 
| BLU/RED
 
| BLU/RED
| XRef 17
+
| Rear Defroster relay
|
 
 
|  
 
|  
 
|-  
 
|-  
 
| 2M
 
| 2M
|  
+
| W51 0Ohm
 
| RED/BLK
 
| RED/BLK
| XRef 18
+
| throttle position sensor
| +Powertrain Control Module (Transmission)
 
 
|  
 
|  
 
|-  
 
|-  
 
| 2N
 
| 2N
|  
+
| W52 0Ohm
 
| RED/BLU
 
| RED/BLU
| XRef 19
+
| heated O2 sensor
|
 
 
|  
 
|  
 
|-  
 
|-  
 
| 2O
 
| 2O
|  
+
| W53 0Ohm
 
| RED
 
| RED
| XRef 20
+
| MAF signal
|
+
| analog input
|  
 
 
|-  
 
|-  
 
| 2P
 
| 2P
|  
+
| W54 0Ohm
 
| RED/BLK
 
| RED/BLK
| XRef 21
+
| intake air thermosensor
|
+
| analog input
|  
 
 
|-  
 
|-  
 
| 2Q
 
| 2Q
 
|  
 
|  
 
| BLU/WHT
 
| BLU/WHT
| XRef 22
+
| Coolant thermosensor
|
 
 
|  
 
|  
 
|-  
 
|-  
Line 290: Line 270:
 
|  
 
|  
 
| YEL/GRN
 
| YEL/GRN
| XRef 23
+
| Pressure regulator solenoid
|
+
| Output/low side (?)
|  
 
 
|-  
 
|-  
 
| 2S
 
| 2S
 
|  
 
|  
 
| BLU/WHT
 
| BLU/WHT
|
 
 
| Condenser Fan Relay
 
| Condenser Fan Relay
|  
+
| Output/low side (?)
 
|-  
 
|-  
 
| 2T
 
| 2T
|  
+
| W58 0Ohm
 
| LT GRN
 
| LT GRN
|
+
| Fuel Pump relay
| Fuel Pump+Data Link Connector
+
| Output/low side
|  
 
 
|-  
 
|-  
 
| 2U
 
| 2U
|  
+
| W59
 
| YEL
 
| YEL
|
 
 
| Injector #1
 
| Injector #1
 
| Output/low side
 
| Output/low side
 
|-  
 
|-  
 
| 2V
 
| 2V
|  
+
| W60 0Ohm
 
| YEL/BLK
 
| YEL/BLK
|
 
 
| Injector #2
 
| Injector #2
 
| Output/low side
 
| Output/low side
 
|-  
 
|-  
 
| 2W
 
| 2W
|  
+
| W61 0Ohm
 
| BLU/ORG
 
| BLU/ORG
| XRef 25
+
| 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
 
| Output/low side
 
| Output/low side
 
|-  
 
|-  
 
| 2Z
 
| 2Z
|  
+
| W64 0Ohm
 
| GRN
 
| GRN
|
 
 
| Injector #4
 
| Injector #4
 
| Output/low side
 
| Output/low side
 
|}
 
|}
 
  
 
== Diagram ==
 
== Diagram ==
Line 359: 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