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Page Title: TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
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TM   9-2320-360-20-3 Section  4 TROUBLESHOOTING CHARTS E. FLASH CODE: 34 J1587 CODE: P102 4 - TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE) STEP/SEQUENCE 34-8 Check for Open +5 Volt Line Turn ignition off. Disconnect  the  vehicle  harness connectors at the ECM. Install a jumper wire between pins A and C of the TBS connector. Read  resistance  between  sockets W1 and Y2 on the engine harness  connector. 34-9 Check for Short Remove jumper. Read  resistance  between  pins  A and C on the TBS connector. 34-10 Check for Short to Battery + Turn ignition off. Disconnect  batteries  (para  7-61). Disconnect  the  engine  harness vehicle  harness  and  5-way  power harness connectors at the ECM. Read  resistance  between  socket P1 of the engine harness connector and socket B3 of the vehicle  harness  connector. Also read resistance between socket P1 on the engine harness connector and the following sockets on the 5-way power harness connector: A and C. RESULT WHAT TO DO NEXT Less than or equal to 5 ohms. Greater than 5 ohms or open. Less than or equal to 10,000 ohms. Greater than 10,000 ohms or open. All readings are greater than 10,000 ohms or open. Any reading is less than or equal to 10,000 ohms. Go to 34-9. The engine +5 volt line (ckt #416) is open. Repair open. Then go to 34-30. The +5 volt line (ckt #416) is shorted to return line (ckt #452). Repair short. Then go to 34-30. Go to 34-7. Go to 34-7. A short exists between the sockets  where  less  than  10,000 ohms resistance was read. Repair  short  and  connect batteries. Then go to 34-30. H-173

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