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.
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HOMESERVICE MANUALSMAZDA2001626 ES V6-2.5L DOHCREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - ACCESSORIES AND OPTIONAL EQUIPMENTCENTRAL CONTROL MODULETESTING AND INSPECTION
2001 Mazda 626 ES V6-2.5L DOHC
Central Control Module: Testing and Inspection
2001 Mazda 626 ES V6-2.5L DOHCSECTION Testing and Inspection
CPU INSPECTION
1. Remove the driver's side front scuff plate.
2. Remove the driver's side front side trim.
3. Remove the nut fixed in the joint box.
4. Follow the appropriate procedure, referring to the terminal voltage list.
All terminals of the connector A
NOTE:
- The voltage cannot be measured nor can a continuity to ground check be performed at the terminals of connector A with the connectors connected to the joint box.
- Remove the CPU from the joint box, then measure the voltage or check for continuity to ground at the CPU terminals from the joint box side with the joint box connectors connected.
Terminals 4B and 4D of connector D
- Disconnect the CPU connector before checking for continuity at terminals 4B and 4D as shown in the figure.
Terminals except 4B and 4D of connector D
- Measure the voltage at the CPU connector while it is connected with the CPU as shown in the figure.
5. If not as specified, inspect the parts listed under Inspection area" and the related wiring harnesses.
6. If the parts and wiring harnesses are okay but system still does not work properly, replace the CPU.
1. Remove the driver's side front scuff plate.
2. Remove the driver's side front side trim.
3. Remove the nut fixed in the joint box.
Terminal Pinouts:
Terminal 1A - 1E:
Terminal 1F - 2D:
Terminal 2E - 3J:
Terminal 4A - 4N:
4. Follow the appropriate procedure, referring to the terminal voltage list.
All terminals of the connector A
NOTE:
- The voltage cannot be measured nor can a continuity to ground check be performed at the terminals of connector A with the connectors connected to the joint box.
- Remove the CPU from the joint box, then measure the voltage or check for continuity to ground at the CPU terminals from the joint box side with the joint box connectors connected.
Terminals 4B and 4D of connector D
- Disconnect the CPU connector before checking for continuity at terminals 4B and 4D as shown in the figure.
Terminals except 4B and 4D of connector D
- Measure the voltage at the CPU connector while it is connected with the CPU as shown in the figure.
5. If not as specified, inspect the parts listed under Inspection area" and the related wiring harnesses.
6. If the parts and wiring harnesses are okay but system still does not work properly, replace the CPU.
RENDER: 1.0x
NO RELATED
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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.