2002 Hyundai Accent 1.3 12V to Beta 1 2.0 Coupe Swap ( wiring?)
Senior Member

Joined: Apr 2009
Posts: 1,687
Likes: 1
From: Sacramento, CA
Vehicle: 02 Hyundai Accent
Ok here we go, this is what I have so far on your Accent. First though I have some pics of an Accent harness marked with the plugs I'm talking about. This is a 1.6L harness from a 2002 accent, The plugs that will have to be swapped with the equivalent on to the beta harness are marked MC01 and MC02 on the Cab side of the harness and EC01 is on the engine bay side.
I have also marked other things for reference.

Below are pics of the plug viewed from the back were the wires enter the plug. The numbering of the wires will be important so pick up numbered sticker strips for marking wires. Plugs MC01 (main connector 1) and MC02 plug into the Accent main harness and EC01 plugs into the engine bay fuse box. You need to make your beta harness do this to work in the Accent.



Now if you get lucky the beta harness will be using the same style of pins in there connectors as your accent. If so then you can depin the plugs to do the swap. If they dont match the you will have to cut the plugs off with at least 6 inches of wire (mark the wires before cutting) and then cut the plugs off the beta ( again wires marked) match them up and solder, lots of solder. Also if its anything like the beta 2 harness I used then there will be a lot of wire rerouting, I will no more when I crack the beta 1 harness.
I have also marked other things for reference.

Below are pics of the plug viewed from the back were the wires enter the plug. The numbering of the wires will be important so pick up numbered sticker strips for marking wires. Plugs MC01 (main connector 1) and MC02 plug into the Accent main harness and EC01 plugs into the engine bay fuse box. You need to make your beta harness do this to work in the Accent.



Now if you get lucky the beta harness will be using the same style of pins in there connectors as your accent. If so then you can depin the plugs to do the swap. If they dont match the you will have to cut the plugs off with at least 6 inches of wire (mark the wires before cutting) and then cut the plugs off the beta ( again wires marked) match them up and solder, lots of solder. Also if its anything like the beta 2 harness I used then there will be a lot of wire rerouting, I will no more when I crack the beta 1 harness.
Senior Member

Joined: Apr 2009
Posts: 1,687
Likes: 1
From: Sacramento, CA
Vehicle: 02 Hyundai Accent
Color Breakdown - W=White, B=Black, R=Red, L=Blue, P=Pink, G=Green
Gr=Grey, O=Orange, Y=Yellow, Br=Brown, also the "/" = with stripe, example
L/B is Blue with Black stripe or Br/O is Brown with Orange stripe.
2002 LC Accent l.5L Manual
MC01
Pin size/color Function
1 Blank
2 0.3 W CEL Control - Gauge Panel
3 0.3 R K-line - Data Link Connector
4 0.3 L/B Speed sensor - Gauge Panel - ECM - Data Link Connector
5 0.5 P/B Diagnostic Module for Tank Leakage - Solenoid Control
6 0.3 L Engine Coolant Temp Sensor Sendor - Gauge Panel *DOHC ONLY*
7 0.3 Y/B Diagnostic Module for Tank Leakage - Pump Control
8 0.5 P A/C Switch On Input
9 0.3 Gr Engine RPM - Gauge Panel
10 0.5 Br Smarta Signal (immobilizer)*not used in U.S.*
11 Blank - used on auto matic trans
12 Blank - used on automatic trans
13 0.5 G/O Smarta (immobilizer) Indicator Control *not used in the U.S.*
14 0.5 G/B Diagnostic Module for Tank leakage - Sensor Heating
15 Blank - used on automatic trans
16 0.3 G/B Fuel Gauge - ECM
17 Blank
18 0.5 B ECM Sensor Ground - Up and Downstream 02 Sensor, Engine Coolant Temp Sensor
19 0.3 P ECM Sensor Signal - Engine Coolant Temp Sensor
20 Blank
21 0.3 G ECM Sensor Ground - Accelerator, Throttle Position and Data Link Connector Sensors
22 0.5 B Not used - The wire may be there but Schematics say not used
23 0.5 P/B Not used - The wire may be there but Schematics say not used
MC02
Pin size/color Function
1 Blank
2 0.5 Y A/C Relay - Compressor
3 2.0 O Ignition Coil 1 & 2, Condenser
4 2.0 L/O Front Wiper Motor - 20 Amp Dash Fuse Box
5 2.0 Br Front Wiper Motor "High" - Multi Switch
6 2.0 G Front wiper Motor "Low" - Multi Switch
7 0.3 G/B Auto Tranny Range Switch
8 0.85 Br/O Front Wiper Motor Parking Switch Rest
9 Blank
10 1.25 B Front Wiper Motor Ground
11 1.25 O On "Start" Input - ECM - Fuse Box
12 0.85 G Reverse Lights
13 Blank - Auto Trans
14 0.5 Gr/B Brake Fluid Level Sensor - Gauge panel
15 0.5 Gr/O Oil Pressure Switch - Gauge panel
EC01
Pin size/color Function
1 3.0 R Ignition Switch, Start Relay Hot
2 2.0 Gr Engine Control Relay, ECM Fuse 1
3 0.5 G/B Fuel Pump Relay, ECM Relay Control
4 2.0 Gr Fuel pump relay
5 2.0 R Engine control Relay
6 0.85 G ECM Fuse 2 15 Amp - Idle Speed Actuator
7 0.3 Y/B Cooling signal Input
8 0.3 P A/C Signal Input
9 0.3 Y Fan Relay Control "High"
10 0.5 P/B ECM 1 Fuse 10 Amp - Both 02 Sensors, ECM, Purge Control Valve
11 0.5 Br A/C Relay, ECM Relay Control
12 0.3 Y/B Fan Relay Control "Low"
13 Still looking
14 Still looking
15 Still looking
Gr=Grey, O=Orange, Y=Yellow, Br=Brown, also the "/" = with stripe, example
L/B is Blue with Black stripe or Br/O is Brown with Orange stripe.
2002 LC Accent l.5L Manual
MC01
Pin size/color Function
1 Blank
2 0.3 W CEL Control - Gauge Panel
3 0.3 R K-line - Data Link Connector
4 0.3 L/B Speed sensor - Gauge Panel - ECM - Data Link Connector
5 0.5 P/B Diagnostic Module for Tank Leakage - Solenoid Control
6 0.3 L Engine Coolant Temp Sensor Sendor - Gauge Panel *DOHC ONLY*
7 0.3 Y/B Diagnostic Module for Tank Leakage - Pump Control
8 0.5 P A/C Switch On Input
9 0.3 Gr Engine RPM - Gauge Panel
10 0.5 Br Smarta Signal (immobilizer)*not used in U.S.*
11 Blank - used on auto matic trans
12 Blank - used on automatic trans
13 0.5 G/O Smarta (immobilizer) Indicator Control *not used in the U.S.*
14 0.5 G/B Diagnostic Module for Tank leakage - Sensor Heating
15 Blank - used on automatic trans
16 0.3 G/B Fuel Gauge - ECM
17 Blank
18 0.5 B ECM Sensor Ground - Up and Downstream 02 Sensor, Engine Coolant Temp Sensor
19 0.3 P ECM Sensor Signal - Engine Coolant Temp Sensor
20 Blank
21 0.3 G ECM Sensor Ground - Accelerator, Throttle Position and Data Link Connector Sensors
22 0.5 B Not used - The wire may be there but Schematics say not used
23 0.5 P/B Not used - The wire may be there but Schematics say not used
MC02
Pin size/color Function
1 Blank
2 0.5 Y A/C Relay - Compressor
3 2.0 O Ignition Coil 1 & 2, Condenser
4 2.0 L/O Front Wiper Motor - 20 Amp Dash Fuse Box
5 2.0 Br Front Wiper Motor "High" - Multi Switch
6 2.0 G Front wiper Motor "Low" - Multi Switch
7 0.3 G/B Auto Tranny Range Switch
8 0.85 Br/O Front Wiper Motor Parking Switch Rest
9 Blank
10 1.25 B Front Wiper Motor Ground
11 1.25 O On "Start" Input - ECM - Fuse Box
12 0.85 G Reverse Lights
13 Blank - Auto Trans
14 0.5 Gr/B Brake Fluid Level Sensor - Gauge panel
15 0.5 Gr/O Oil Pressure Switch - Gauge panel
EC01
Pin size/color Function
1 3.0 R Ignition Switch, Start Relay Hot
2 2.0 Gr Engine Control Relay, ECM Fuse 1
3 0.5 G/B Fuel Pump Relay, ECM Relay Control
4 2.0 Gr Fuel pump relay
5 2.0 R Engine control Relay
6 0.85 G ECM Fuse 2 15 Amp - Idle Speed Actuator
7 0.3 Y/B Cooling signal Input
8 0.3 P A/C Signal Input
9 0.3 Y Fan Relay Control "High"
10 0.5 P/B ECM 1 Fuse 10 Amp - Both 02 Sensors, ECM, Purge Control Valve
11 0.5 Br A/C Relay, ECM Relay Control
12 0.3 Y/B Fan Relay Control "Low"
13 Still looking
14 Still looking
15 Still looking
Senior Member

Joined: Dec 2008
Posts: 3,837
Likes: 0
From: Floating around the AUDM
Vehicle: X3 Sprint, S-Coupe Turbo

That was, by far, the best beta swap wiring info I've ever read. Hotblue02, you are a friggen gangster. I can only +rep you once per post but that is solid info.
Thread Starter
Senior Member
Joined: Dec 2011
Posts: 539
Likes: 0
From: England
Vehicle: Hyundai Accent
Cleaned her up for swap.
Yep iv fitted a 1.5 12V swap right into my engine and used normal loom and ECU in the past.


Killer wiring info, Hope it all go's alright and rep'ed ur posts.
i just hope i dont get confused as iv never wired or done engine swap so all names of wires ect are scaring me lol
Yep iv fitted a 1.5 12V swap right into my engine and used normal loom and ECU in the past.


Killer wiring info, Hope it all go's alright and rep'ed ur posts.

i just hope i dont get confused as iv never wired or done engine swap so all names of wires ect are scaring me lol
Senior Member

Joined: Apr 2009
Posts: 1,687
Likes: 1
From: Sacramento, CA
Vehicle: 02 Hyundai Accent
When im done you will see the way! If I have my daughter this weekend I wont have much time to work on the wiring, if I dont have her I will try and finish it tonight or get very close. My daughter hasnt decided if she wants to come out this weekend.
Thread Starter
Senior Member
Joined: Dec 2011
Posts: 539
Likes: 0
From: England
Vehicle: Hyundai Accent
i understand mate.
I'm removing dashboard and removing accent loom asap.
If u want any pics of beta loom or hyundai get in touch.
i really would like to know if ecu have built in imboilizer/alarm or weather there on a box behide dash hidden.
as my key will no longer work/start the tib engine.
I would need to remove the code pickup sensor around barel and strip down the tib key so the car always picks up the right code or have a key made up with tib code but accent key correct ?
I'm removing dashboard and removing accent loom asap.
If u want any pics of beta loom or hyundai get in touch.
i really would like to know if ecu have built in imboilizer/alarm or weather there on a box behide dash hidden.
as my key will no longer work/start the tib engine.
I would need to remove the code pickup sensor around barel and strip down the tib key so the car always picks up the right code or have a key made up with tib code but accent key correct ?



