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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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RELAY INSPECTION

Relay Type

Connector type

Part name

Type A

  • IG1 relay

  • A/C relay

  • Horn relay

  • Starter relay

  • Electric variable valve timing relay

  • ACC relay

  • Rear window defogger relay

  • Main relay

  • Fuel injector relay

  • Fuel pump relay

Type B

  • Wiper INT relay

  • Wiper HI relay

Type C

  • Blower relay

  • Cooling fan relay

Type A

1. Remove the relay. (See RELAY LOCATION.)
2. Verify the continuity between relay terminals C and D.

  • If it can be verified, replace the relay. (See RELAY LOCATION.)

  • If it cannot be verified, go to the next step.

3. Verify the continuity between relay terminals E and A.

  • If it can be verified, go to the next step.

  • If it cannot be verified, replace the relay. (See RELAY LOCATION.)

4. Apply battery voltage to relay terminal E, and connect terminal A to ground.
5. Verify the continuity between relay terminals C and D.

Type B

1. Remove the relay. (See RELAY LOCATION.)
2. Verify the continuity between relay terminals C and D.

  • If it can be verified, replace the relay. (See RELAY LOCATION.)

  • If it cannot be verified, go to the next step.

3. Verify the continuity between the relay terminals E and A.

  • If it can be verified, go to the next step.

  • If it cannot be verified, replace the relay. (See RELAY LOCATION.)

4. Verify the continuity between the relay terminals B and D.

  • If it can be verified, go to the next step.

  • If it cannot be verified, replace the relay. (See RELAY LOCATION.)

5. Apply battery voltage to relay terminal E, and connect terminal A to ground.
6. Verify the continuity between relay terminals C and D.

Type C

1. Remove the relay. (See RELAY LOCATION.)
2. Verify the continuity between the relay terminals C and A.

  • If it can be verified, replace the relay. (See RELAY LOCATION.)

  • If it cannot be verified, go to the next step.

3. Verify the continuity between the relay terminals D and B.

  • If it can be verified, go to the next step.

  • If it cannot be verified, replace the relay. (See RELAY LOCATION.)

4. Apply battery voltage to relay terminal D, and connect terminal B to ground.
5. Verify the continuity between relay terminals C and A.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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