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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-479 CIRCUIT OPERATION • The ECM <M/T> or PCM <A/T> controls TROUBLESHOOTING HINTS (The most likely • Malfunction of the charging system. • Short circuit in the harness between generator G • ECM <M/T> or PCM <A/T> failed. DIAGNOSIS STEP 1. Check the voltage at generator intermediate backprobing. a. Engine: warming up c. Headlight switch: OFF to ON d. Rear defogger switch: OFF to ON • Voltage rises by 0.2-3.5 volts. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the voltage normal? YES : Replace the generator. Then confirm that the malfunction symptom is eliminated. NO : Go to Step 2. AK000220 AK000220AB CONNECTOR : B-13 AK000735AB CONNECTOR:B-45 AK000225 CONNECTOR : C-51<M/T>, C-52<A/T> C-52 C-51 PCM<A/T> ECM<M/T> AJ AK000365 AB B-13 CONNECTOR 1 2 3 4 5 6 7 8 |