mazda Workshop Repair Guides

Mazda Workshop Service and Repair Manuals

Disc Brake System > < No. 4 Brake System Light Does Not Illuminate During Key Up|Page 3990
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Brake Warning Indicator: Testing and Inspection
No. 18 Brake System Warning Light Does Not Illuminate-Fluid Low

Flowchart No.18 Symptom  Brake system warning light does not illuminate with brake fluid in reservoir below MIN

Possible cause

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Damaged brake fluid level sensor

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Open or short circuit in wiring harness

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Poor connection of connector

Step 1

1. Disconnect the brake fluid level sensor connector.

Ohmmeter Connection

Action Chart

2. Check for continuity between terminal A (B) of the brake fluid level sensor connector and ground.

Step 2

Ohmmeter Connection

Reference

1. Check for continuity between the terminals of the brake fluid level sensor.
2. If correct, repair the wiring harness (instrument cluster-brake fluid level sensor).
3. If not as specified, replace the brake fluid level sensor. 

Disc Brake System > < No. 4 Brake System Light Does Not Illuminate During Key Up|Page 3990