Operation CHARM: Car repair manuals for everyone.

Power Relay Test

Power Relay Test

Normally-open type A:










1. Turn the battery module switch OFF, and measure the voltage.
2. Check for continuity between the terminals.
- There should be continuity between the No. 1 and No. 2 terminals when power and ground are connected to the No. 3 and No. 4 terminals.
- There should be no continuity between the No. 1 and No. 2 terminals when power is disconnected.

- A/C compressor clutch relay
- Air fuel ratio sensor relay
- Condenser fan relay
- Daytime running lights relay (Canada)
- Headlight relay 1
- Headlight relay 2
- High speed battery module fan control relay
- High speed motor power inverter module fan control relay
- High voltage conductor control relay
- Horn relay
- Ignition hold relay
- Low speed battery module fan control relay
- Low speed motor power inverter module fan control relay
- Power window relay
- Radiator fan relay
- Rear window defogger relay
- Reverse relay
- Starter cut relay
- Taillight relay

Normally-open type B:




EPS Motor Relay:




Hatch Opener Relay:




Blower Motor Relay, Type 1::




Blower Motor Relay, Type 2::




Blower Motor High Relay:




1. Turn the battery module switch OFF, and measure the voltage.
2. Check for continuity between the terminals.
- There should be continuity between the No. 1 and No. 3 terminals when power and ground are connected to the No. 2 and No. 4 terminals.
- There should be no continuity between the No. 1 and No. 3 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 power and ground are connected to the No. 3 and No. 5 terminals.
- There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.
- Fan control relay
- Low beam cut relay (Canada)
- Windshield wiper intermittent relay