Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2022 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Standard (Reference)
-: Not applicable
VOLTAGE, CONTINUITY AND RESISTANCE SPECIFICATION
| Terminal | Signal name | Connected to | Measured item | Measured terminal (measurement condition) | Standard | Inspection item(s) |
|---|---|---|---|---|---|---|
| 1A | Power supply | Battery | Voltage | Under any condition | B+ |
|
| 1B | - | - | - | - | - | - |
| 1C | Electric parking brake motor gear unit (RH) | Electric parking brake motor gear unit (RH) | Continuity | 1C-Electric parking brake motor gear unit (RH) terminal B | Continuity detected |
|
| 1D | CAN2_H | CAN module | This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection. | |||
| 1E | Stop signal | Electrical supply unit | Continuity | 1E-Electrical supply unit terminal 3L | Continuity detected |
|
| 1F | CAN2_L | CAN module | This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection. | |||
| 1G | - | - | - | - | - | - |
| 1H | Electric parking brake motor gear unit (RH) | Electric parking brake motor gear unit (RH) | Continuity | 1H-Electric parking brake motor gear unit (RH) terminal A | Continuity detected |
|
| 1I | Electric parking brake switch | Electric parking brake switch | Continuity | 1I-Electric parking brake switch terminal | Continuity detected |
|
| 1J | Electric parking brake switch indicator light | Electric parking brake switch indicator light (built into electric parking brake switch) | Continuity | 1J-Electric parking brake switch terminal F | Continuity detected |
|
| 1K | Electric parking brake switch | Electric parking brake switch | Continuity | 1K-Electric parking brake switch terminal H | Continuity detected |
|
| 1L | - | - | - | - | - | - |
| 1M | RF wheel-speed sensor (-) | ABS wheel-speed sensor (RF) | Continuity | 1M-ABS wheel-speed sensor (RF) terminal A | Continuity detected |
|
| 1N | Electric parking brake switch | Electric parking brake switch | Continuity | 1N-Electric parking brake switch terminal I | Continuity detected |
|
| 1O | Power supply (system) | IG1 relay No. 2 | Voltage | Ignition switched ON (engine off). | B+ |
|
| Switch the ignition off. | 1 V or less | |||||
| 1P | RF wheel-speed sensor (+) | ABS wheel-speed sensor (RF) | Continuity | 1P-ABS wheel-speed sensor (RF) terminal B | Continuity detected |
|
| 1Q | Electric parking brake switch | Electric parking brake switch | Continuity | 1Q-Electric parking brake switch terminal | Continuity detected |
|
| 1R | - | - | - | - | - | - |
| 1S | LR wheel-speed sensor | ABS wheel-speed sensor (LR) | Continuity | 1S-ABS wheel-speed sensor (LR) terminal D | Continuity detected |
|
| 1T | - | - | - | - | - | - |
| 1U | - | - | - | - | - | - |
| 1V | LR wheel-speed sensor | ABS wheel-speed sensor (LR) | Continuity | 1V-ABS wheel-speed sensor (LR) terminal B | Continuity detected |
|
| 1W | - | - | - | - | - | - |
| 1X | - | - | - | - | - | - |
| 1Y | LF wheel-speed sensor | ABS wheel-speed sensor (LF) | Continuity | 1Y-ABS wheel-speed sensor (LF) terminal A | Continuity detected |
|
| 1Z | - | - | - | - | - | - |
| 1AA | - | - | - | - | - | - |
| 1AB | LF wheel-speed sensor | ABS wheel-speed sensor (LF) | Continuity | 1AB-ABS wheel-speed sensor (LF) terminal B | Continuity detected |
|
| 1AC | - | - | - | - | - | - |
| 1AD | - | - | - | - | - | - |
| 1AE | RR wheel-speed sensor | ABS wheel-speed sensor (RR) | Continuity | 1AE ABS wheel-speed sensor (RR) terminal D | Continuity detected |
|
| 1AF | Brake fluid level sensor | Brake fluid level sensor | Continuity | 1AF-brake fluid level sensor terminal A | Continuity detected |
|
| 1AG | - | - | - | - | - | - |
| 1AH | RR wheel-speed sensor | ABS wheel-speed sensor (RR) | Continuity | 1AH-ABS wheel-speed sensor (RR) terminal B | Continuity detected |
|
| 1AI | - | - | - | - | - | - |
| 1AJ | - | - | - | - | - | - |
| 1AK | Electric parking brake motor gear unit (LH) | Electric parking brake motor gear unit (LH) | Continuity | 1AK-Electric parking brake motor gear unit (LH) terminal A | Continuity detected |
|
| 1AL | Brake fluid | Brake fluid level sensor level sensor | Continuity | 1AL-brake fluid level sensor terminal B | Continuity detected |
|
| am | CAN1_H | CAN module | This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection. | |||
| 1AN | - | - | - | - | - | - |
| 1AO | CAN1_L | CAN module | This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection. | |||
| 1AP | Electric parking brake motor gear unit (LH) | Electric parking brake motor gear unit (LH) | Continuity | 1AP-Electric parking brake motor gear unit (LH) terminal B | Continuity detected |
|
| 1AQ | - | - | - | - | - | - |
| 1AR | - | - | - | - | - | - |
| 1AS | Ground | Ground point | Continuity | 1AS-Ground point | Continuity detected |
|
| 1AT | - | - | - | - | - | - |
| 2A | Ground | Ground point | Continuity | 2A-Ground point | Continuity detected |
|
| 2B | Power supply | Battery | Voltage | Under any condition | B+ |
|
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.