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 MANUALSHONDA2000PRELUDE BASE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM & ENGINE COMPONENT TESTSCOMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULEPOWER CIRCUITS
2000 Honda Prelude Base, Standard
Power Circuits
2000 Honda Prelude Base, StandardSECTION Power Circuits
- Check for battery voltage between appropriate PCM connector Voltage Back-Up (VBU) terminal and ground. See POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION table. If battery voltage does not exist, check appropriate PCM fuse. See PCM POWER CIRCUIT FUSE IDENTIFICATION table. If fuse is okay, check for an open in wire between fuse and appropriate PCM connector terminal. See WIRING DIAGRAMS article.
- Turn ignition on. Check for battery voltage between appropriate PCM connector Ignition Power (IGP) source terminal and ground. See POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION table. If battery voltage does not exist, check appropriate fuse. See PCM POWER CIRCUIT FUSE IDENTIFICATION table. If fuse is okay, check for open in wire between fuse and appropriate PCM connector terminal. Check for defective ignition switch. See WIRING DIAGRAMS article.
POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION
| Application | (1)PCM Terminal | ||||||
|---|---|---|---|---|---|---|---|
| Ground Circuits | |||||||
| Accord, Civic (Except D16Y5 Engine With M/T), CR-V, Odyssey & S2000 | |||||||
| Logic Ground (LG1 & LG2) | B20 & B22 | ||||||
| Power Ground (PG1 & PG2) | B2 & B10 | ||||||
| Sensor Ground (SG1 & SG2) | C7 & C18 | ||||||
| Civic D16Y5 Engine With M/T & Prelude | |||||||
| Logic Ground (LG1 & LG2) | A9 & A22 | ||||||
| Power Ground (PG1 & PG2) | A10 & A23 | ||||||
| Sensor Ground (SG1 & SG2) | D12 & D11 | ||||||
| Power Circuits | |||||||
| Accord, Civic (Except D16Y5 Engine With M/T), CR-V, Odyssey & S2000 | |||||||
| Ignition Switch In OFF Position (VBU)(2) | B21 | ||||||
| Ignition Switch In ON Position (IGP1 & IGP2)(2) | B1 & B9 | ||||||
| Sensor Voltage (VCC1 & VCC2) | C19 & C28 | ||||||
| Civic D16Y5 Engine With M/T & Prelude | |||||||
| Ignition Switch In OFF Position (VBU)(2) | C10 | ||||||
| Ignition Switch In ON Position (IGP1 & IGP2)(2) | A11 & A24 | ||||||
| Sensor Voltage (VCC1 & VCC2) | D4 & D10 | ||||||
|
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PCM POWER CIRCUIT FUSE IDENTIFICATION
| Ignition Position/Circuit | Fuse | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ON/IGP1 & IGP2 | ||||||||||
| Accord (2), Odyssey (2) & S2000 (4) | No. 46 - ACG-S (15-Amp) | |||||||||
| Civic (2) & CR-V (2) | No. 44 - FI E/M (15-Amp) | |||||||||
| Prelude (3) | No. 4 - ACG-S (10-Amp) | |||||||||
| OFF/VBU | ||||||||||
| Accord (1) & Odyssey (1) | No. 13 - CLOCK/BACK-UP (7.5-Amp) | |||||||||
| Civic(2) & CR-V (2) | No. 47 - BACK-UP (7.5-Amp) | |||||||||
| Prelude (2) | No. 43 - CLOCK/RADIO (7.5-Amp) | |||||||||
| S2000 (3) | No. 25 - BACK-UP (7.5-Amp) | |||||||||
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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.