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.
1994 Mazda 929FACTORY OEM SERVICE PROCEDURE
Central Processing Unit (CPU)
NOTE:
Remove CPU when measuring voltages at terminals 3C and 3F of CPU 14-pin connector.
With CPU connectors connected, measure voltage at specified terminal of CPU connectors. SeeFig 1 . See CPU TERMINAL VOLTAGES . If voltages are not as specified, replace CPU.
CPU TERMINAL VOLTAGES
| Terminal | Application | Condition | Test Volts | ||
|---|---|---|---|---|---|
| 1K | Door/Trunk Opener Relay | Other | 12 | ||
| 1O | Door/Trunk Opener Relay | Other | Greater | ||
| " | " | " | Than Zero | ||
| 1P | Keyless Unit 1 | Other | Zero | ||
| 2F | Passenger Door Lock Actuator | Lock. | Approx. 5 | ||
| 2F | Passenger Door Lock Actuator | Unlocked | Zero | ||
| 2H | Driver Door Lock Actuator | Lock | Approx. 5 | ||
| 2H | Driver Door Lock Actuator | Unlocked | Zero | ||
| 2I | Keyless Unit 2 | Other | Zero | ||
| 2J | Rear Door Lock Actuator | Lock | Approx. 5 | ||
| 2J | Rear Door Lock Actuator | Unlocked | Zero | ||
| 2L | Door Key Cylinder Switch | Locked | 2.5 | ||
| 2L | (Passenger Side) | Unlocked | Zero | ||
| 2L | (Passenger Side) | Other | 5 | ||
| 2P | Door Lock Switch | Locked | 2.5 | ||
| 2P | Door Lock Switch | Unlocked | Zero | ||
| 2P | Door Lock Switch | Other | 5 | ||
| 2R | Door Key Cylinder Switch | Unlocked | Zero | ||
| 2R | (Driver Side) | Other | 5 | ||
| 3C (1) | Door Lock Timer Unit (Lock) | Constant | 12 | ||
| 3F (1) | Door Lock Timer Unit (Unlock) | Constant | 12 | ||
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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.