Dualpoint to Multipoint harness madness.
#1
Honda-Tech Member
Thread Starter
Dualpoint to Multipoint harness madness.
I've recently acquired an 88 dual point CRX and am in the process of swapping a GSR engine and most everything I have from a somewhat decent DA build from the past, suspensions and what not.. I spent the better part of a week trying to find info that didn't involve many random wires running throughout the engine bay and wasn't looking to utilize any jumper harnesses. Also I had a difficult time finding pinout info and wiring diagrams online. Many links were available but everything seemed to be 10+ years old and most of the links were dead. Finally I went to my local Honda shop and was able to photograph all the information needed out of the original service manual. I purchased a 90-91 multi point engine harness and set about decoding both engine and chassis harnesses to create a new pinout utilizing the dual point chassis harness with the multipoint engine harness making it 100% plug and play. In addition I've added accommodations within both harnesses for Vtec and also added wiring for future oil pressure and coolant temp gauges that will all pin out in the factory plugs. At the end of the day I have what I feel is a pretty easy solution as well as a clean factory looking harness so long as you're willing to unwrap your engine harness. I don't know if anyone is interested in having this info for future or current projects but I'll happily post it and all of the pinout and wiring diagrams. So far I have completed the engine harness and am in the process of making a piggy back harness for the chassis side as I am unwilling to unwrap the chassis harness.
#2
Honda-Tech Member
Re: Dualpoint to Multipoint harness madness.
id be interested in that
this way you can just go to hondatech and find this thread and thats it
you wont have to go anywhere else
this way you can just go to hondatech and find this thread and thats it
you wont have to go anywhere else
#3
Honda-Tech Member
Thread Starter
Re: Dualpoint to Multipoint harness madness.
1.5L Dualpoint fuel injection wiring diagram.
1.5L Dualpoint connections
1.5L Dualpoint pinouts
1.6L Multipoint fuel injection wiring diagram
1.6L Multipoint connections
1.6L Multipoint pinouts
1.5L Dualpoint connections
1.5L Dualpoint pinouts
1.6L Multipoint fuel injection wiring diagram
1.6L Multipoint connections
1.6L Multipoint pinouts
#4
Honda-Tech Member
Thread Starter
Re: Dualpoint to Multipoint harness madness.
DUAL POINT
Dual Point Fuel Injection Pinout Plug 210 Passenger Side
Dual Point Fuel Injection Pinout Plug 210 Passenger Side
Plug C210 passenger side firewall
Apologies for the format below but it was difficult to get it to lay out any other way. Chassis side will be listed above and engine side will be listed below. On the engine side the letter and number that follow description are for the coinciding plug found on the engine harness in the wiring diagram.
Chassis/Engine
1. BLK/RED A18
1. BLK/RED Ground
2. BRN/BLK A16
2. BRN/BLK Ground
3. WHT3 C16
3. WHT3 O2 Sensor C106
4. RED/WHT C6
4. RED/WHT TW Sensor C107
5. RED/YEL C5
5. RED/YEL TA Sensor C119
6. GRN/WHT C12
6. GRN/WHT TW Sensor C107
7. WHT/YEL B5
7. WHT/YEL Alternator C116
8. ORN/BLU C3
8. ORN/BLU TDC C104
9. YEL B14
9. YEL Alternator C116
10. YEL/WHT C13
10. YEL/WHT Throttle Angle Sensor C120
11. RED/BLU C7
11. RED/BLU Throttle Angle Sensor C120
12. WHT4 C2
12. WHT4 Crank C104
13. ORN C1
13. ORN Crank C104
14. WHT/BLU C4
14. WHT/BLU TDC C104
Dual Point Fuel Injection Pinout Plug C313 Driver Side
Plug C313 driverside firewall
Chassis/Engine
1. YEL/BLK1 main relay
1. YEL/BLK1 Main Injector C118
2 RED1 A7
2. RED1 Main Injector C118
3. BLU/YEL A11
3. BLU/YEL EACV C121
4. GRN/BLK Reverse
4. GRN/BLK Reverse
5. YEL1 A3
5. YEL1 Auxiliary Injector C117
6. YEL/BLK2 main relay
6. YEL/BLK2 Auxiliary Injector C117
7. YEL3 Reverse
7. YEL3 Reverse Lights
8. ORN B2
8. ORN TVCSV C115
9. BLK/YEL Fuse Box
9. BLK/YEL TVCSV
10. YEL/GRN
10. YEL/GRN
11. WHT B15 & B17
11. WHT Ignitor C104
12. Empty
12. Empty
13. Empty
13. Empty
14. Empty
14. Empty
Apologies for the format below but it was difficult to get it to lay out any other way. Chassis side will be listed above and engine side will be listed below. On the engine side the letter and number that follow description are for the coinciding plug found on the engine harness in the wiring diagram.
Chassis/Engine
1. BLK/RED A18
1. BLK/RED Ground
2. BRN/BLK A16
2. BRN/BLK Ground
3. WHT3 C16
3. WHT3 O2 Sensor C106
4. RED/WHT C6
4. RED/WHT TW Sensor C107
5. RED/YEL C5
5. RED/YEL TA Sensor C119
6. GRN/WHT C12
6. GRN/WHT TW Sensor C107
7. WHT/YEL B5
7. WHT/YEL Alternator C116
8. ORN/BLU C3
8. ORN/BLU TDC C104
9. YEL B14
9. YEL Alternator C116
10. YEL/WHT C13
10. YEL/WHT Throttle Angle Sensor C120
11. RED/BLU C7
11. RED/BLU Throttle Angle Sensor C120
12. WHT4 C2
12. WHT4 Crank C104
13. ORN C1
13. ORN Crank C104
14. WHT/BLU C4
14. WHT/BLU TDC C104
Dual Point Fuel Injection Pinout Plug C313 Driver Side
Plug C313 driverside firewall
Chassis/Engine
1. YEL/BLK1 main relay
1. YEL/BLK1 Main Injector C118
2 RED1 A7
2. RED1 Main Injector C118
3. BLU/YEL A11
3. BLU/YEL EACV C121
4. GRN/BLK Reverse
4. GRN/BLK Reverse
5. YEL1 A3
5. YEL1 Auxiliary Injector C117
6. YEL/BLK2 main relay
6. YEL/BLK2 Auxiliary Injector C117
7. YEL3 Reverse
7. YEL3 Reverse Lights
8. ORN B2
8. ORN TVCSV C115
9. BLK/YEL Fuse Box
9. BLK/YEL TVCSV
10. YEL/GRN
10. YEL/GRN
11. WHT B15 & B17
11. WHT Ignitor C104
12. Empty
12. Empty
13. Empty
13. Empty
14. Empty
14. Empty
Last edited by CRXTION; 04-03-2017 at 07:06 PM.
#5
Honda-Tech Member
Thread Starter
Re: Dualpoint to Multipoint harness madness.
MULTI POINT
Multi Point Fuel Injection Pinout Plug C210 Passenger Side
Plug C210 passenger side firewall
Chassis/Engine
1. BLK/RED A18
1. BLK/RED Ground
2. BRN/BLK A16
2. BRN/BLK Ground
3. WHT3 C16
3. WHT3 O2 Sensor C157
4. BLU/GRN C1
4. BLU/GRN CYL C155
5. BLU/YEL C2
5. BLU/YEL CYL C155
6. GRN/WHT2 C12
6. GRN/WHT2 TW Sensor C158
7. WHT/YEL B5
7. WHT/YEL Alternator C167
8. ORN/BLU C3
8. ORN/BLU TDC C155
9. BLU2 B14
9. BLU2 Alternator C167
10. YEL/WHT C13
10. YEL/WHT TAS C168
11. RED/BLU C7
11. RED/BLU TAS C168
12. WHT4 B12
12 WHT4 Crank C155
13. ORN B10
13. ORN Crank C155
14. WHT/BLU C4
14. WHT/BLU TDC C155
Multi Point Fuel Injection Pinout Plug C212 Passenger Side
Plug C212 passenger side firewall
Chassis/Engine
1. YEL Reverse
1. YEL Reverse
2. WHT1 B15 & B17
2. WHT1 Ignitor C155
3. RED/WHT1 C6
3. RED/WHT1 TW Sensor C158
4. GRN/BLK Reverse
4. GRN/BLK Reverse
5. YEL/GRN
5. YEL GRN
6. RED/YEL C5
6. RED/YEL TA Sensor C173
Multi Point Fuel Injection Pinout Plug C313 Driver Side
Plug C313 driver side firewall
Chassis/Engine
1. RED A3
1. RED No. 2 Injector C170
2. BRN A1
2. BRN No. 1 Injector C169
3. Lt BLU A5
3. Lt BLU No. 3 Injector C171
4. YEL1 A7
4. YEL1 No. 4 Injector C172
5. BLK/YEL to C211
5. BLK/YEL Fast Idle C176
6. BLU1 B2
6. BLU1 Fast Idle C176
7. BLU/YEL A11
7. BLU/YEL EACV C166
8. YEL/BLK1 A15
8. YEL/BLK1 Injector Resistor C174
Multi Point Fuel Injection Pinout Plug C210 Passenger Side
Plug C210 passenger side firewall
Chassis/Engine
1. BLK/RED A18
1. BLK/RED Ground
2. BRN/BLK A16
2. BRN/BLK Ground
3. WHT3 C16
3. WHT3 O2 Sensor C157
4. BLU/GRN C1
4. BLU/GRN CYL C155
5. BLU/YEL C2
5. BLU/YEL CYL C155
6. GRN/WHT2 C12
6. GRN/WHT2 TW Sensor C158
7. WHT/YEL B5
7. WHT/YEL Alternator C167
8. ORN/BLU C3
8. ORN/BLU TDC C155
9. BLU2 B14
9. BLU2 Alternator C167
10. YEL/WHT C13
10. YEL/WHT TAS C168
11. RED/BLU C7
11. RED/BLU TAS C168
12. WHT4 B12
12 WHT4 Crank C155
13. ORN B10
13. ORN Crank C155
14. WHT/BLU C4
14. WHT/BLU TDC C155
Multi Point Fuel Injection Pinout Plug C212 Passenger Side
Plug C212 passenger side firewall
Chassis/Engine
1. YEL Reverse
1. YEL Reverse
2. WHT1 B15 & B17
2. WHT1 Ignitor C155
3. RED/WHT1 C6
3. RED/WHT1 TW Sensor C158
4. GRN/BLK Reverse
4. GRN/BLK Reverse
5. YEL/GRN
5. YEL GRN
6. RED/YEL C5
6. RED/YEL TA Sensor C173
Multi Point Fuel Injection Pinout Plug C313 Driver Side
Plug C313 driver side firewall
Chassis/Engine
1. RED A3
1. RED No. 2 Injector C170
2. BRN A1
2. BRN No. 1 Injector C169
3. Lt BLU A5
3. Lt BLU No. 3 Injector C171
4. YEL1 A7
4. YEL1 No. 4 Injector C172
5. BLK/YEL to C211
5. BLK/YEL Fast Idle C176
6. BLU1 B2
6. BLU1 Fast Idle C176
7. BLU/YEL A11
7. BLU/YEL EACV C166
8. YEL/BLK1 A15
8. YEL/BLK1 Injector Resistor C174
#6
Honda-Tech Member
Thread Starter
Re: Dualpoint to Multipoint harness madness.
That's both harnesses decoded. In re-pinning I had to rob the dual point harness of a few plugs to make things work. I have my engine harness completely built and as stated in the original post, I have stubbed out additional wires for both the Vtec oil pressure switch and Vtec solenoid plugs. I will end up purchasing the 1 pin connector for the Vtec solenoid plug from Rywire as they have a pretty great selection of empty connectors. In addition I've also stubbed out two wires within the engine harness to accommodate future oil pressure and coolant temp sensors. Pictured below is the unwrapped engine harness. I used small zip ties to hold the overall form of the harness and keep it organized during disassembly. Anywhere that wiring branched off from the main run of wires I also made sure to add zips. The DA Integra donor car also had an OBD0 to OBD1 jumper harness and in an attempt to lose all jumpers I also took the time while the harness was apart to solder in the OBD1 distributor plug. Originally I tried to pin in the OBD0 pins to that connector but the pins are not the same so I had to cut and solder these connections. Depending on which distributor you have there is plenty of info online for re-pinning this connector so I won't go into detail on that. In addition I also soldered the four RED/BLK injector wires into the YEL/BLK Injector resistor wire as is required with the OBD0 to OBD1 conversion. I also needed to move three wires within the Multi Point engine harness from the passenger side to the driver side because they stub out on that side of the chassis harness in connector C313. In an attempt to keep chassis harness modification to an absolute minimum, to avoid the obvious headache I made the decision to modify it within the engine harness. This change made room for my Vtec wiring on the passenger side connector C212 which had originally been full. I also changed the the driver side engine harness C313 from an 8 pin connector to the 14 pin connector that is on the chassis. I will go over all of this in the next post. I have not yet built the piggy back under dash harness so I am not comfortable posting my completed hybrid pin out until I've finished the under dash portion.
I originally thought this task was going to be daunting but once I was able to put both sheets side by side and see what was the same and what was different between the two harnesses, making the necessary changes became quite easy. It's only matching colors and numbers at the end of the day and I'm sure anyone with the ability to create a Honda-tech login can do that. The end result will be an engine bay that has a factory appearance with no stray wires and with all pins and connectors available within both engine harnesses, it really isn't very expensive either. Only a bit tedious and time consuming. Pictured below is also the completed engine harness although I ran out of tape that night so no calling me out on that. Also as I'm sure you can see I've not added the plugs for the Vtec additions but will do so as soon as I order the necessary 1 pin connector from Rywire.
I originally thought this task was going to be daunting but once I was able to put both sheets side by side and see what was the same and what was different between the two harnesses, making the necessary changes became quite easy. It's only matching colors and numbers at the end of the day and I'm sure anyone with the ability to create a Honda-tech login can do that. The end result will be an engine bay that has a factory appearance with no stray wires and with all pins and connectors available within both engine harnesses, it really isn't very expensive either. Only a bit tedious and time consuming. Pictured below is also the completed engine harness although I ran out of tape that night so no calling me out on that. Also as I'm sure you can see I've not added the plugs for the Vtec additions but will do so as soon as I order the necessary 1 pin connector from Rywire.
Last edited by CRXTION; 04-03-2017 at 07:54 PM.
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#10
Honda-Tech Member
Thread Starter
Re: Dualpoint to Multipoint harness madness.
Had some delays with the swap so I've not posted the finished schematic yet as it is obviously untested. The car is going in the week for some interior monkey bars and after that's been completed the swap should commence.
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moreforthebuck
Honda CRX / EF Civic (1988 - 1991)
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