General Information: Removal & Installation Mazda 3 BL

INSTALLATION OF RADIO SYSTEM

The control module and control unit have been designed with sufficient attention to radio wave disturbances from the outside. However, observe the following precautions when installing the radio set to the vehicle to prevent adverse effects on the control module and control unit.

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1. Install the radio set and its antenna as far away as possible from the control module and control unit.
2. The antenna feeder and power cable generate radio waves, therefore, keep them 100 mm or more from the control module, control unit, and wiring harness. If the antenna feeder and power cable cross over the wiring harness, place them perpendicular to the wiring harness.
3. Do not install a high output radio set.
4. Do not use the control module and control unit power source for the radio set. In addition, do not use the cigar lighter and accessory socket power source.
5. Do not attach the antenna feeder or wiring harness of the radio set to the wiring harness, fuel pipe, or brake tube of the vehicle.
6. Do not install any radio set-related devices in the area where the air bag module deploys to prevent a secondary accident if the air bag were to deploy.
7. After installing the radio set, perform a test transmission with the engine idling to verify that it does not affect engine control.

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1. Before disconnecting connectors or removing electrical parts, disconnect the negative battery cable.

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1. To remove the wiring harness from the clip in the engine room, pry up the hook of the clip using a flathead screwdriver. CAUTION: Do not remove the harness protective tape. Otherwise, the wires could rub against the body, which could result in water penetration and electrical shorting.

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1. When disconnecting connector, grasp the connectors, not the wires.
2. Connectors can be disconnected by pressing or pulling the lock lever as shown.

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1. When locking connectors, listen for a click indicating they are securely locked.

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1. When a tester is used to inspect for continuity or measuring voltage, insert the tester probe from the wiring harness side.
2. Inspect the terminals of waterproof connectors from the connector side since they cannot be accessed from the wiring harness side. CAUTION: To prevent damage to the terminal, wrap a thin wire around the tester probe before inserting into terminal.

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1. Pull lightly on individual wires to verify that they are secured in the terminal.

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1. Use the appropriate tools to remove a terminal as shown. When installing a terminal, be sure to insert it until it locks securely.
2. Insert a thin piece of metal from the terminal side of the connector and with the terminal locking tab pressed down, pull the terminal out from the connector.

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1. Handle sensors, switches, and relays carefully. Do not drop them or strike them against other objects.

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1. Two-color wires are indicated by a two-color code symbol.
2. The first letter indicates the base color of the wire and the second the color of the stripe. WIRING COLOR CODES CODE COLOR CODE COLOR B Black O Orange BR Brown P Pink G Green R Red GY Gray V Violet L Blue W White LB Light Blue Y Yellow LG Light Green

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1. When replacing a fuse, be sure to replace it with one of the same capacity. If a fuse fails again, the circuit probably has a short and the wiring should be inspected.
2. Be sure the negative battery terminal is disconnected before replacing a main fuse.
3. When replacing a pullout fuse, use the fuse puller.