The PGM-FI key Relay is the relay that provides power come the fuel injection device on your 1992-1995 1.5L Honda Civic and Civic Del Sol.

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It have the right to be conveniently tested on the vehicle to discover out if it"s poor or not. In this tutorial I"ll define how to perform it.

you can find this tutorial in Spanish here: Cómo Probar El PGM-FI main Relay (1992-1995 1.5L Honda Civic) (at:

APPLIES TO: This tutorial uses to the following vehicles:

1.5L Honda public CX: 1992, 1993, 1994, 1995.1.5L Honda civic DX: 1992, 1993, 1994, 1995.1.5L Honda civic EX: 1992, 1993, 1994, 1995.1.5L Honda public LX: 1992, 1993, 1994, 1995.1.5L Honda public Si: 1992, 1993, 1994, 1995.1.5L Honda public VX: 1992, 1993, 1994, 1995.1.5L Honda public Del sol S: 1993, 1994, 1995.1.5L Honda civic Del sol Si: 1993, 1994, 1995.


Symptoms that A bad PGM-FI key Relay

The PGM-FI main Relay usually fails in among two ways. It"ll either fail fully and your Civic"s engine will not start.

Or the relay will certainly fail intermittently and the engine will certainly not begin every now and then.

The PGM-FI key Relay fail usually has to do through it no being able to supply power to the fuel pump.

In this accuse I"ll show you exactly how to check it and also find out if it"s bad (or not) v a multimeter.

PGM-FI key Relay pin Out

PGM-FI key Relay CircuitsPinWire ColorDescription
1Yellow w/ white strip (YEL/WHT)12 Volts Input
2Black (BLK)Chassis ground (-)
3Yellow w/ black stripe (YEL/BLK)12 Volts output To ECM
5Black w/ yellow strip (BLK/YEL)Ignition 12 Volts Input
6Blue w/ white strip (BLU/WHT)12 Volts intake (Ign. Move Start place Only)
7Yellow w/ environment-friendly stripe (YEL/GRN)12 Volts output To Fuel Pump
8Green w/ yellow strip (GRN/YEL)Fuel Pump manage Signal

TEST 1: Making certain That Terminal No. 1 Is getting 12 Volts

For our first test we"re gonna" make sure that female terminal number 1, the the PGM-FI key Relay"s connector, is gaining 10 come 12 Volts DC.

The wire the connects to female terminal no. 1 is the yellow with white stripe (YEL/WHT) cable of the connector.

Terminal no. 1 gets power from fuse no. 31 that the underhood fuse and also relay box.

We"ll use a multimeter to make certain that it"s acquiring 10 to 12 Volts DC at all times.

These are the test steps:


Disconnect the PGM-FI key Relay indigenous its electric connector.


Place your multimeter in Volts DC mode.


Connect the black multimeter test cause a good Ground point.I recommend that you use a jumper cable to connect the black color multimeter test bring about the battery an unfavorable (-) terminal.


Gently probe the mrs terminal labeled with the number 1 (in the picture above) v the red multimeter test lead.Female terminal no. 1 connects to the YEL/WHT wire.


Your multimeter have to register 10 to 12 Volts DC.NOTE: girlfriend don"t must turn the an essential to the on position, due to the fact that power must be available at every times.

Let"s uncover out what her test result means:

CASE 1: 10 to 12 Volts space present. This is the correct and expected test result.

Now that you"ve evidenced that power is present, the following step is to make sure that terminal no. 5 is acquiring power too. Walk to: test 2: Making certain That Terminal No. 5 Is acquiring 12 Volts.

CASE 2: 10 come 12 Volts room NOT present. Inspect that you"re testing the exactly female terminal of the connector.

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If you"re tho not gaining 10 to 12 Volts, climate your following step is to make sure that fuse no. 31 of the underhood fuse and also relay box is not blown.