How to wire a 2g 4g63 engine

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2G 4G63 wiring for an engine swap

• 1995-99 2G DSM 4G63 engine swap wiring schematic diagram (seen in image)

1995-99 4G63 wiring schematic diagram / schematic for a 2G DSM 4g63 engine.

2G 4G63 MPI Relay (Connector B-87)

• The MPI relay distributes power to the 4G63 engine. If you wire it wrong, you will have problems like your fuel pump not turning on, ECU not powering up properly, etc.

• Unplug the MPI connector from the MPI relay and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the MPI relay is facing up.

The order of pins are:

12

34

• Pin 1 - Red Wire - This wire spiderwebs through the harness and goes to Pin 12 & Pin 25 at the ECU. It is also connected to:

Idle Speed Control Motor (Pin 2 & Pin 5)

Oxygen Sensor (Pin 1)

Mass Airflow Sensor (Pin 4)

Camshaft Position Sensor (Pin 3)

Crankshaft Position Sensor (Pin 3)

Injector Resistor (Pin 3)

• Pin 2 - Light Green Wire - This is a direct wire to Pin 38 at the ECU.

• Pin 3 - Red with Black Stripe Wire - This can be combined with MPI Pin 4 and connected to a 20A Fuse. The other side of this fuse should connect to the battery, giving it power all the time.

• Pin 4 - Red with Black Stripe Wire - This can be combined with MPI Pin 3 and connected to a 20A Fuse. The other side of this fuse should connect to the battery, giving it power all the time.

2G 4G63 Fuel Injector Wiring

• #1 cylinder (Connector A-50) (front cylinder, closest to water pump)

Pin 1 - Red wire

Pin 2 - Green wire

• #2 cylinder (Connector A-56)

Pin 1 - Red wire

Pin 2 - Yellowfins with Black Stripe wire

• #3 cylinder (Connector A-61)

Pin 1 - Red wire

Pin 2 - Green with Yellow Stripe wire

• #4 cylinder (Connector A-93) (rear cylinder, closest to transmission)

Pin 1 - Red

Pin 2 - Green with Red Stripe wire

2G 4G63 Power Transistor wires: (Connector A-92)

Unplug the power transistor connector and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the power transistor is facing up. The order of pins from left to right are:

12345678

• Pin 1 - Blue w/ Black stripe wire -> Goes to Pin 1 of Ignition Coil (Connector A-62)
• Pin 2 - Brown w/ Red stripe wire -> Goes to Pin 23 of ECU (Connector B-53)
• Pin 3 - Black wire -> Ground
• Pin 4 - White stripe wire -> Goes to Pin 31 at ECU (Connector B-54)
• Pin 5 - Empty
• Pin 6 - Black w/ white stripe wire -> Goes to Pin 3 of Ignition Coil (Connector A-62)
• Pin 7 - Black w/ Blue stripe wire -> Goes to Pin 10 of the ECU (Connector B-53)
• Pin 8 - Black w/ white stripe wire -> Goes to Engine Speed Connector (Connector A-59)

2G 4G63 Oxygen Sensor (Connector B-26)

• Pin 1 - Red wire - Goes to pin 25 of the ECU (Connector B-53)
• Pin 2 - Black wire - Goes to Pin 92 at the ECU (Connector B-56), and Pin 2 of the Engine Coolant Temperature Sensor (Connector A-97), and Pin 4 of the Throttle Position Sensor (Connector A-63), and
• Pin 3 - Yellow wire - Goes to pin 35 at the ECU (Connector B-54)
• Pin 4 - White wire - Goes to pin 76 at the ECU (Connector B-56)
• There is a ground shield for the O2 Sensor wires as well

2G 4G63 MAF Mass Air Flow wires: (Connector A-102)

Unplug the Mass Airflow Sensor connector and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the MAF are facing up. The order of pins from left to right are:

12345678

• Pin 1 - Green w/ yellow stripe wire - Goes to pin 81 at ECU, and Pin 1 of the TPS
• Pin 2 - Orange wire - Goes to pin 85 at ECU
• Pin 3 - Blue w/ yellow stripe wire - Goes to pin 90 at ECU
• Pin 4 - Red wire - Goes to Pin 3 of Camshaft Position Sensor, and Pin 3 of the Crankshaft Position Sensor, and Pin 1 of the Oxygen Sensor, and Pin 1 on the EGR Valve, and Pin 2 of the Purge Solenoid valve, and Pins 2 & 5 of of Idle Air Control Motor, and Pin 1 on the MPI Relay, and all Injectors, and Pins 25 & 12 at the ECU
• Pin 5 - Black wire - Goes to Pin 4 of the TPS, and Pin 2 of the Oxygen Sensor, and Pin 2 of the Engine Coolant Temperature Sensor, and Pin 92 at the ECU
• Pin 6 - Red w/ blue strip wire - Goes to Pin 72 at the ECU
• Pin 7 - Red w/ white strip - Goes to Pin 19 at ECU
• Pin 8 - Empty

2G 4G63 Crankshaft Position Sensor wires: (Connector A-04)

Unplug the Crankshaft Position Sensor connector and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the Crank sensor are facing up. The order of pins from left to right are:

1 2

3

• Pin 1 - Black wire - Goes to Pin 1 of the Camshaft Position Sensor, and Ground.
• Pin 2 - Blue w/ white stripe wire - Goes to Pin 89 of the ECU
• Pin 3 - Red wire - Goes to Pin 3 of Camshaft Position Sensor, and Pin 4 at the Mass Airflow Sensor, and Pin 1 of the Oxygen Sensor, and Pin 1 on the EGR Valve, and Pin 2 of the Purge Solenoid valve, and Pins 2 & 5 of of Idle Air Control Motor, and Pin 1 on the MPI Relay, and all Injectors, and Pins 25 & 12 at the ECU

2G 4G63 Camshaft Position Sensor wires: (Connector A-81)

Unplug the Camshaft Position Sensor connector and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the Cam sensor are facing up. The order of pins from left to right are: 1 2 3

• Pin 1 - Black wire - Goes to Pin 1 of the Crankshaft Position Sensor, and Ground.
• Pin 2 - Blue w/ red stripe wire - Goes to Pin 88 of the ECU
• Pin 3 - Red wire - Goes to Pin 3 of Crankshaft Position Sensor, and Pin 4 at the Mass Airflow Sensor, and Pin 1 of the Oxygen Sensor, and Pin 1 on the EGR Valve, and Pin 2 of the Purge Solenoid valve, and Pins 2 & 5 of of Idle Air Control Motor, and Pin 1 on the MPI Relay, and all Injectors, and Pins 25 & 12 at the ECU

2G 4G63 Throttle Position Sensor wires: (Connector A-63)

Unplug the Throttle Position Sensor connector and look straight into the pins at the end of the wiring connector. Wires away from you. Make sure the clip that locks the connector into the TPS are facing up. The order of pins from left to right are: 1 2 3 4

• Pin 1 - Green w/ yellow stripe wire - Goes to Pin 81 at the ECU, and Pin 1 of the Mass Airflow Sensor.
• Pin 2 - Brown w/ red stripe wire - Goes to Pin 84 of the ECU
• Pin 3 - Yellow w/ red stripe wire - Goes to Pin 87 of the ECU
• Pin 4 - Black wire - Goes to pin 5 of the Mass Airflow Sensor, and Pin 2 of the Oxygen Sensor, and Pin 2 of the Engine Coolant Temperature Sensor, and Pin 92 at the ECU

More coming soon...