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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-880 (3) Measure the voltage between terminal No. 131 and ground. NOTE: Vehicles for Canada, the headlight, taillight, etc. a. Engine: warming up c. Headlight switch: OFF to ON d. Rear defogger switch: OFF to ON • Voltage should be drop. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 3. STEP 3. Using scan tool MB991958, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the YES : Replace the PCM. Then go to Step 8. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . STEP 4. Check harness connector B-116 at generator YES : Go to Step 5. . Then go to Step 8. 127 126 125 124 123 122 121 133 132 131 130 129 128 140 139 138 137 136 135 134 146 145 144 143 142 141 153 152 151 150 149 148 147 AK203297 POWER PLANT ECU AB AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AK401056 M 2 1 3 4 AB CONNECTOR: B-116 B-116 (GR) HARNESS |