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.
1998 Mazda B3000 SX, AutomaticFACTORY OEM SERVICE PROCEDURE
Power Circuit
- Power (PWR) circuit for PCM is located at PCM terminal No. 55 (Yellow wire). PCM is located in right rear of engine compartment. If PWR fuse circuit is open or shorted, a Diagnostic Trouble Code (DTC) should set. See TESTS W/CODES article and check for DTCs. If no DTC's are present, go to next step.
- To check PCM power circuit, measure voltage between ground and PCM connector terminal No. 55. See TEST EQUIPMENT under PIN VOLTAGE/PID VALUE CHARTS article for test equipment to be used.
- If battery voltage is not present, locate and repair open or short circuit between PCM connector and fuse No. 18 in engine compartment fuse/relay box. See appropriate wiring diagram in WIRING DIAGRAMS article.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.