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
ETCS relay
Front accessory power socket relay
Front fog light 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 the No. 1 and No. 2 terminals when power and ground are connected to the No. 4 and No. 3 terminals.
  • There should be no continuity between the No. 1 and No. 2 terminals 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 the No. 16 terminal and body ground. There should be battery voltage between the No. 5 terminal and body ground.
    • Disconnect the No. 16 terminal from body ground. There should be no voltage between the No. 5 terminal and body ground.
    Ignition coil relay:
    • Connect the No. 16 terminal and body ground. There should be battery voltage between the No. 18 terminal and body ground.
    • Disconnect the No. 16 terminal from body ground. There should be no voltage between the No. 18 terminal and body ground.
    PGM-FI subrelay:
    • Connect the No. 20 terminal and body ground. There should be battery voltage between the No. 9 terminal and body ground.
    • Disconnect the No. 20 terminal from body ground. There should be no voltage between the No. 9 terminal and body ground.
    ETCS relay:
    • Connect power and ground between the No. 15 (+) and the No. 17 (−) terminals. There should be battery voltage between the No. 6 terminal and body ground.
    • Disconnect power and ground from the No. 15 (+) and the No. 17 (−) terminals. There should be no voltage between the No. 6 terminal and body ground.
    Rear window defogger relay:
    • Connect power and ground between the No. 4 (−) and the No. 14 (+) terminals. There should be battery voltage between the No. 3 terminal and body ground.
    • Disconnect power and ground from the No. 4 (−) and the No. 14 (+) terminals. There should be no voltage between the No. 3 terminal 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 the No. 5 (−) and the No. 8 (+) terminals. There should be battery voltage between the No. 13 terminal and body ground.
    • Disconnect power and ground from the No. 5 and the No. 8 (+) terminals. There should be no voltage between the No. 13 terminal and body ground.
    A/C condenser fan relay:
    • Connect power and ground between the No. 4 (−) and the No. 16 (+) terminals. There should be battery voltage between the No. 12 terminal and body ground.
    • Disconnect power and ground from the No. 4 (−) and the No. 16 (+) terminals. There should be no voltage between the No. 12 terminal and body ground.
    Blower motor relay:
    • Connect power and ground between the No. 1 (−) and the No. 8 (+) terminals. There should be battery voltage between the No. 3 terminal and body ground.
    • Disconnect power and ground from the No. 1 (−) and the No. 8 (+) terminals. There should be no voltage between the No. 3 terminal and body ground.
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. 5 and No. 3 terminals.
  • There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.