Keyless Receiver Inspection

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the following parts:
1. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION .)
2. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION .)
3. Trunk side pocket (RH) (See TRUNK SIDE POCKET REMOVAL/INSTALLATION .)
4. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
5. Rear scuff plate (RH) (See REAR SCUFF PLATE REMOVAL/INSTALLATION .)
6. Third-row seat cushion (See THIRD-ROW SEAT CUSHION REMOVAL/INSTALLATION .)
7. Third-row seat back component (See THIRD-ROW SEAT BACK COMPONENT REMOVAL/INSTALLATION .)
8. Trunk side trim (RH) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION .)
Remove the keyless receiver with the connector still connected. (See KEYLESS RECEIVER REMOVAL/INSTALLATION .)
Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL 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.

Terminal Voltage Table (Reference)

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	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
C	-	-	-	-	-
D	GND	Body ground	Under any condition	1.0 or less	Ground