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.
Tcm Pin Test
1995 Mazda MX-3 L4-1598cc 1.6L DOHCSECTION Tcm Pin Test
INSPECTION
1. Disconnect the transaxle control module (TCM) connectors.
2. Connect the special service tools (SST)s (Engine Signal Monitor and Adapter Harness) to the transaxle control module as shown.
3. Place the SST (Overlay Sheet) on the Engine Signal Monitor.
4. Turn the ignition switch ON, and check the transaxle control module terminal voltage, referring to TCM Terminal Voltage Charts.
5. If any transaxle control module terminal input/output voltage is incorrect, check the related input or output devices and wiring. If no problem is found in these devices, replace the transaxle control module.
CAUTION: Applying voltage to terminals A and B on the SST-engine signal monitor will damage the SST.
1. Disconnect the transaxle control module (TCM) connectors.
View: Special Service Tool (SST) Connections:
2. Connect the special service tools (SST)s (Engine Signal Monitor and Adapter Harness) to the transaxle control module as shown.
View: Overlay Sheet SST-49 G018 904:
3. Place the SST (Overlay Sheet) on the Engine Signal Monitor.
4. Turn the ignition switch ON, and check the transaxle control module terminal voltage, referring to TCM Terminal Voltage Charts.
5. If any transaxle control module terminal input/output voltage is incorrect, check the related input or output devices and wiring. If no problem is found in these devices, replace the transaxle control module.
View: Special Service Tool (SST):
CAUTION: Applying voltage to terminals A and B on the SST-engine signal monitor will damage the SST.
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.