Keyless Receiver Inspection

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION ).
Remove the following parts:
1. Wind blocker (See WIND BLOCKER REMOVAL/INSTALLATION ).
2. Seat (LH) (See SEAT REMOVAL/INSTALLATION ).
3. Scuff plate (LH) (See SCUFF PLATE REMOVAL/INSTALLATION ).
4. Tire house trim (LH) (See TIRE HOUSE TRIM REMOVAL/INSTALLATION ).
5. Side shelf (LH) (See SIDE SHELF REMOVAL/INSTALLATION ).
Disconnect the connector from the keyless receiver.
Remove the keyless receiver. (See KEYLESS RECEIVER REMOVAL/INSTALLATION ).
Reconnect the connector.
Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION ).
Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).
- If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
  - If the system does not operate normally even though the parts under Inspection Item(s) and related wiring harnesses do not have any malfunction, replace the keyless receiver. (See KEYLESS RECEIVER REMOVAL/INSTALLATION ).

Terminal Voltage Table (Reference)

Fig 1: Identifying Keyless Receiver Wiring Harness Connector Terminals

Courtesy of MAZDA MOTORS CORP.

Terminal	Signal name	Connected to	Measurement conditions	Voltage (V)	Inspection item(s)
A	Power supply	Start stop unit	Under any condition	Approx. 5.0	Start stop unit
B	DATA	Start stop unit	Because this terminal is for communication, determination using terminal voltage inspection is not possible.		Start stop unit
D	GND	Body ground	Under any condition	1.0 or less	Ground