Power Relay Test
Use this chart to identify the type of relay, then do the test listed for it.
Relay
Test
ACC cut relay
Normally-open type
A/C compressor clutch relay
A/C condenser fan relay
Blower motor relay
Cigarette lighter relay
ETCS relay
Front accessory power socket relay
Front fog light relay
Headlight washer relay
Horn relay
IG2 cut relay
Ignition coil relay
PGM-FI main relay 1, 2
PGM-FI subrelay
Power mirror defogger relay
Radiator fan relay
Rear accessory power socket relay
Rear window defogger relay
Seat heater relay (high)
Starter cut relay
Driver's super locking relay *
Five-terminal type
Fan control relay
Inhibiter relay
Passenger's super locking relay *
Seat heater relay (low)

*:
KE model

Normally-open type (Except PGM-FI main relay 1, Ignition coil relay, PGM-FI subrelay ETCS relay, Rear window defogger relay, Radiator fan relay, Condenser fan relay and blower motor relay)
Check for continuity between the terminals.
  • There should be continuity between terminals No. 1 and No. 2 when power and ground are connected to terminals No. 4 and No. 3.
  • There should be no continuity between terminals No. 1 and No. 2 when power is disconnected.
PGM-FI main relay 1, Ignition coil relay, PGM-FI subrelay, ETCS relay, Rear window defogger relay
  1. Disconnect the under-hood fuse/relay box connector D (20P).
  1. At the under-hood fuse/relay box side, do the following test.
    PGM-FI main relay 1:
    • Connect terminal No. 16 and body ground. There should be battery voltage between terminal No. 5 and body ground.
    • Disconnect terminal No. 16 from body ground. There should be no voltage between terminal No. 5 and body ground.
    Ignition coil relay:
    • Connect terminal No. 16 and body ground. There should be battery voltage between terminal No. 18 and body ground.
    • Disconnect terminal No. 16 from body ground. There should be no voltage between terminal No. 18 and body ground.
    PGM-FI subrelay:
    • Connect terminal No. 20 and body ground. There should be battery voltage between terminal No. 9 and body ground.
    • Disconnect terminal No. 20 from body ground. There should be no voltage between terminal No. 9 and body ground.
    ETCS relay:
    • Connect power and ground between terminals No. 15 (+) and the No. 17 (−). There should be battery voltage between terminal No. 6 and body ground.
    • Disconnect power and ground from terminals No. 15 (+) and the No. 17 (−). There should be no voltage between terminal No. 6 and body ground.
    Rear window defogger relay:
    • Connect power and ground between terminals No. 4 (−) and the No. 14 (+). There should be battery voltage between terminal No. 3 and body ground.
    • Disconnect power and ground from terminals No. 4 (−) and the No. 14 (+). There should be no voltage between terminal No. 3 and body ground.
Radiator fan relay, A/C condenser fan relay, Blower motor relay
  1. Disconnect the under-hood fuse/relay box connector E (20P).
  1. At the under-hood fuse/relay box side, do the following test.
    Radiator fan relay:
    • Connect power and ground between terminals No. 5 (−) and the No. 8 (+). There should be battery voltage between terminal No. 13 and body ground.
    • Disconnect power and ground from terminals No. 5 and the No. 8 (+). There should be no voltage between terminal No. 13 and body ground.
    A/C condenser fan relay:
    • Connect power and ground between terminals No. 4 (−) and the No. 16 (+). There should be battery voltage between terminal No. 12 and body ground.
    • Disconnect power and ground from terminals No. 4 (−) and the No. 16 (+). There should be no voltage between terminal No. 12 and body ground.
    Blower motor relay:
    • Connect power and ground between terminals No. 1 (−) and the No. 8 (+). There should be battery voltage between terminal No. 3 and body ground.
    • Disconnect power and ground from terminals No. 1 (−) and the No. 8 (+). There should be no voltage between terminal No. 3 and body ground.
Headlight washer relay
  1. Disconnect the under-hood fuse/relay box connector K (5P).
  1. At the under-hood fuse/relay box side, do these tests.
    • Connect terminal No. 1 and body ground. There should be battery voltage between the terminal No. 3 and body ground.
    • Disconnect terminal No. 1 and body ground. There should be no voltage between the terminal No. 3 and body ground.
Five-terminal type
Check for continuity between the terminals.
  • There should be continuity between terminals No. 1 and No. 2 when power and ground are connected to terminals No. 5 and No. 3.
  • There should be continuity between terminals No. 1 and No. 4 when power is disconnected.