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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-999 . CIRCUIT OPERATION • The ECM <M/T> or PCM <A/T> controls genera- tor out put current by duty-controlling continuity . TROUBLESHOOTING HINTS (The most likely • Malfunction of the charging system. • Short circuit in the harness between generator G terminal and ECM <M/T> or PCM <A/T>. • ECM <M/T> or PCM <A/T> failed. DIAGNOSIS STEP 1. Check the voltage at generator connector B-45 by (3) Measure the voltage between terminal 1 and ground by 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. YES : Go to Step 2. AK300244 CONNECTOR: C-52 <A/T> AC PCM C-52 (GR) AK300091 CONNECTOR: C-51 <M/T> ECM AF C-51 (GR) AK300756 2 1 3 4 CONNECTOR: B-45 AB B-45 (GR) HARNESS CONNECTOR: AK103519 AF 1 2 3 4 C-45 HERNESS |