Power and Ground Distribution: Testing and Inspection

Power Relay Test

Use this chart to identify the type of relay, then do the test listed for it.






NOTE: The following relays are part of the relay control module: PGM-FI main relay 1, ignition coil relay, PGM-FI subrelay and ETCS relay. To test these relays, go to relay control module test.

Normally-open type

Check for continuity between the terminals.

- There should be continuity between the No. 1 and No. 2 terminals when battery positive terminal is connected to the No. 4 terminal, and battery negative terminal is connected to the No. 3 terminal.
- There should be no continuity between the No. 1 and No. 2 terminals when power is disconnected.






Five-terminal type

Check for continuity between the terminals.

- There should be continuity between the No. 1 and No. 2 terminals when battery positive terminal is connected to the No. 5 terminal, and battery negative terminal is connected to the No. 3 terminal.
- There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.






Relay Control Module Test

The relay control module is part of the under-hood fuse/relay box, and it contains these relays:
- PGM-FI main relay 1
- Ignition coil relay
- PGM-FI subrelay
- ETCS relay

If any of these relays fail the test, replace the under-hood fuse/relay box.

1. Disconnect the negative battery cable, then disconnect under-hood fuse/relay box connectors C (2P), E (14P), and H (9P).






2. Connect battery power to the C2 terminal.

PGM-FI main relay 1:

- Connect the E5 terminal to body ground. There should be battery voltage between the H1 terminal and body ground.
- Disconnect the E5 terminal from the body ground. There should be no voltage between the H1 terminal and the body ground.

Ignition coil relay:

- Connect the E5 terminal to body ground. There should be battery voltage between the H6 terminal and body ground.
- Disconnect the E5 terminal from the body ground. There should be no voltage between the H6 terminal and the body ground.

PGM-FI subrelay:

- Connect the E5 and E13 terminals to body ground. There should be battery voltage between the H9 terminal and body ground.
- Disconnect the E5 terminal from the body ground. There should be no voltage between the H9 terminal and the body ground.

ETCS relay:

- Connect the E5 and E14 terminals to body ground. There should be battery voltage between the H7 terminal and body ground.
- Disconnect the E5 terminal from the body ground. There should be no voltage between the H7 terminal and the body ground.