Power Relay Test
Use this chart to identify the type of relay, then do the test listed for it.
Note. For the turn signal/hazard relay 1 input test (see TURN SIGNAL/HAZARD RELAY 1 INPUT TEST ).
| Relay | Test |
|---|---|
| A/C compressor clutch relay | Normally-open type |
| Accessory power socket relay | |
| A/F sensor relay | |
| Blower motor relay | |
| Control motor relay (HVAC) | |
| Fog light relay | |
| Fuel fill door open relay | |
| Ignition coil relay | |
| Headlight washer relay (Canada models) | |
| PGM-FI main relay 1,2 | |
| Radiator fan control (RFC) unit relay | |
| Rear window defogger relay | |
| Starter cut relay 1,2 | |
| Seat heater relay | |
| SH-AWD relay | |
| Throttle actuator control module relay | |
| Windshield wiper motor relay | |
| Daytime running lights relay (Canada models) | Five-terminal type |
| ACC cut relay | |
| IG2 cut relay | |
| Adaptive cruise control relay ('06-08 models) | |
| Turn signal/hazard relay 2 (sounder) | Turn signal/ hazard relay 2 |
POWER RELAY REFERENCE
Normally-open type A
Check for continuity between the terminals.
Scheme 2
- There should be continuity between the No. 1 and No. 2 terminals when power is connected to the No. 4 terminal and ground the No. 3 terminal.
- There should be no continuity between the No. 1 and No. 2 terminals when power is disconnected.
Radiator fan relay
Scheme 3
Normally-open type B
Check for continuity between the terminals.
Scheme 4
- 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.
Normally-open type C
Check for continuity between the terminals.
Scheme 5
Scheme 6
- There should be continuity between the No. 1 and No. 3 terminals when battery positive terminal is connected to the No. 2 terminal, and battery negative terminal is connected to the No. 4 terminal.
- There should be no continuity between the No. 1 and No. 3 terminals when power is disconnected. Control motor relay (HVAC)
Five-terminal type B
Check for continuity between the terminals.
Scheme 7
- There should be continuity between the No. 1 and No. 2 terminals when power is connected to the No. 5 terminal and ground the No. 3 terminal.
- There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.
Turn Signal/Hazard Relay 2 (sounder)
Check for a sound from the turn signal/hazard relay 2 The relay should sound once when power and ground are connected to the No. 2 and No. 1 terminals, and No. 3 and No. 1 terminals.
Scheme 8
See also:
• TURN SIGNAL/HAZARD RELAY 1 INPUT TEST