Power Relay Test
Special Tools Required
- Relay Puller 07AAC-000A1 AO or 07AAC-000A2A1
- Relay Socket Extension (4 Pin) 07AGK-000A1A0
- Relay Socket Extension (5 Pin) 07AGK-000A2A0
Use this chart to identify the type of relay, then do the test listed for it.
| Relay | Test |
|---|---|
| A/C compressor clutch relay | Normally-open four-terminal type |
| A/C condenser fan relay | |
| Accessory power socket relay | |
| Cargo area accessory power socket relay | |
| Front blower motor relay | |
| Front seat heater relay | |
| Fog light relay | |
| Headlight low beam relay | |
| Headlight washer relay | |
| Interior light relay | |
| PGM-FI main relay 2 (Fuel pump) | |
| Power window relay | |
| Radiator fan relay | |
| Rear blower motor relay | |
| Rear window defogger relay | |
| Second row seat heater relay | |
| SH-AWD relay | |
| Starter cut relay 1, 2 | |
| TECH relay | |
| ACC cut relay | Five-terminal type |
| Brake light relay | |
| Fan control relay | |
| IG2 cut relay |
Note. The following relays are part of the relay control module: PGM-FI main relay 1, ignition coil relay, PGM-FI subrelay and ETCS control relay. To test these relays, do the relay control module test. Using the relay puller, carefully remove the relay from the under-dash fuse/relay box using the relay puller. Do not use pliers. Pliers will damage the relay.
Scheme 61
Normally-open Four-terminal Type
Check for continuity between the terminals.
- There should be continuity between terminals No. 1 and No. 2 when battery power is connected to terminal No. 4, and body ground is connected to terminal No. 3.
- There should be no continuity between terminals No. 1 and No. 2 when power is disconnected.
Scheme 62
Five-terminal Type
Check for continuity between the terminals.
- There should be continuity between terminals No. 1 and No. 2 when battery power is connected to terminal No. 5, and body ground is connected to terminal No. 3.
- There should be continuity between terminals No. 1 and No. 4 when power is disconnected.
Scheme 63
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 control relay
- Horn relay
If any of these relays fail the test, replace the under-hood fuse/relay box.
Scheme 64
Scheme 65
Scheme 66
- Do the battery terminal disconnection procedure (see «USING THE GR8 BATTERY DIAGNOSTIC STATION»(/acura/mdx/ii-2010-2013/remont/body-electrical/#battery) ), then disconnect under-hood fuse/relay box connectors C (2P), E (14P), and H (9P). NOTE: All connector views are wire side of female terminals.
- Connect battery power to terminal C2. PGM-FI main relay 1: Connect terminal E5 to body ground. There should be battery voltage between terminal H1 and body ground. Disconnect terminal E5 from the body ground. There should be no voltage between terminal H1 and the body ground. Ignition coil relay: Connect terminal E5 to body ground. There should be battery voltage between terminal H6 and body ground. Disconnect terminal E5 from the body ground. There should be no voltage between terminal H6 and the body ground. PGM-FI subrelay Connect terminals E5 and E13 to body ground. There should be battery voltage between terminal H9 and body ground. Disconnect terminal E5 from the body ground. There should be no voltage between terminal H9 and the body ground. ETCS control relay: Connect terminals E5 and E14 to body ground. There should be battery voltage between terminal H7 and body ground. Disconnect terminal E5 from the body ground. There should be no voltage between terminal H7 and body ground.
- Connect battery power to terminal H3. Horn relay: Connect terminal E4 to body ground. There should be battery voltage between terminal H4 and body ground, and between terminal H5 and body ground. Disconnect terminal E4 from the body ground. There should be no voltage between terminal H4 and body ground, and between terminal H5 and body ground.
See also:
• USING THE GR8 BATTERY DIAGNOSTIC STATION