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
Front accessory power socket relay
Front fog light relay
Fuel heater relay
Horn relay
IG2 cut relay
Intake shutter valve relay
PGM-FI main relay 1, 2
PTC heater A, B, C relay
Power mirror defogger relay
Radiator fan relay
Rear accessory power socket relay
Rear window defogger relay
Starter cut relay
Driver's super locking relay
Five-terminal type
Fan control relay
Inhibiter relay
Passenger's super locking relay

Normally-open type (Except PGM-FI main relay 1, 2, Rear window defogger relay, Radiator fan relay, A/C condenser fan relay and blower motor relay, Fuel heater relay, Intake shutter valve relay, PTC heater A, B, C 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.
Intake shutter valve relay, Fuel heater relay, PTC heater A relay, PTC heater B relay, PTC heater C relay
  1. Disconnect the under-hood fuse/relay box connector J (10P) and K (5P).
  1. At the under-hood fuse/relay box side, do the following test.
    Intake shutter valve relay:
    • Connect power and ground between the J No. 9 (+) and the J No. 3 (−) terminals. There should be battery voltage between the J No. 4 terminal and body ground.
    • Disconnect power and ground from the J No. 9 (+) and the J No. 3 (−) terminals. There should be no voltage between the No. 4 terminal and body ground.
    Fuel heater relay:
    • Connect power and ground between the J No. 8 (+) and the J No. 7 (−) terminals. There should be battery voltage between the K No. 5 terminal and body ground.
    • Disconnect power and ground from the J No. 8 (+) and the J No. 7 (−) terminals. There should be no voltage between the No. 5 terminal and body ground.
    PTC heater A relay:
    • Connect power and ground between the J No. 1 (+) and the J No. 10 (−) terminals. There should be battery voltage between the K No. 4 terminal and body ground.
    • Disconnect power and ground from the J No. 1 (+) and the J No. 10 (−) terminals. There should be no voltage between the No. 4 terminal and body ground.
    PTC heater B relay:
    • Connect power and ground between the J No. 1 (+) and the J No. 6 (−) terminals. There should be battery voltage between the K No. 3 terminal and body ground.
    • Disconnect power and ground from the J No. 1 (+) and the J No. 6 (−) terminals. There should be no voltage between the No. 3 terminal and body ground.
    PTC heater C relay:
    • Connect power and ground between the J No. 1 (+) and the J No. 2 (−) terminals. There should be battery voltage between the K No. 2 terminal and body ground.
    • Disconnect power and ground from the J No. 1 (+) and the J No. 2 (−) terminals. There should be no voltage between the No. 2 terminal and body ground.
PGM-FI main relay 1, 2, 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:
    • Connect the No. 20 terminal and the body ground. There should be battery voltage between the No. 17 terminal and the body ground.
    • Disconnect the No. 20 terminal from the body ground. There should be no voltage between the No. 17 terminal and the body ground.
    PGM-FI main relay 2:
    • Connect the No. 20 terminal and the body ground. There should be battery voltage between the No. 8, No. 9, No. 18, No. 19 terminal and the body ground.
    • Disconnect the No. 20 terminal from the body ground. There should be no voltage between the No. 8, No. 9, No. 18, No. 19 terminal and the body ground.
    Rear window defogger relay:
    • Connect power to the No. 18, and ground to the No. 4 terminals. There should be battery voltage between the No. 3 terminal and the body ground.
    • Disconnect power from the No. 18, and ground from the No. 4 terminals. There should be no voltage between the No. 3 terminal and the 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. 15 (+) and the No. 4 (−) terminals. There should be battery voltage between the No. 11 terminal and body ground.
    • Disconnect power and ground from the No. 15 (+) and the No. 4 (−) terminals. There should be no voltage between the No. 11 terminal and body ground.
    A/C condenser fan relay:
    • Connect power and ground between the No. 15 (+) and the No. 16 (−) terminals. There should be battery voltage between the No. 13 terminal and body ground.
    • Disconnect power and ground from the No. 15 (+) and the No. 16 (−) terminals. There should be no voltage between the No. 13 terminal and body ground.
    Blower motor relay:
    • Connect power and ground between the No. 6 (+) and the No. 1 (−) terminals. There should be battery voltage between the No. 3 terminal and body ground.
    • Disconnect power and ground from the No. 6 (+) and the No. 1 (−) 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.