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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 RESULT WHAT TO DO NEXT 34-4 Check for +5 Volts Remove  jumper  wire. Turn ignition on. Read voltage on TBS connector, pin C (red lead) to pin A (black lead). 34-5 Check for Signal Open Turn ignition off. Disconnect  the  engine  harness connector at the ECM. Install a jumper wire between pins A and B of the TBS connector. Read  resistance  between  sockets P1 and Y2 on the engine harness  connector. 34-6 Check for Short Remove   jumper. Read resistance between pins A and B on the TBS connector. Also read resistance between socket B and a good ground. 34-7 Check ECM Connectors Check terminals at the engine  harness  connector (both the ECM and harness side) for damage; bent, corroded, and unseated pins or sockets. Go to 34-5. Go to 34-8. Go to 34-10 Less than or equal to 5 ohms. Go to 34-6. Greater  than 5 ohms or open. Signal line (ckt #432) or return line (ckt #452) is open. Repeat check from pin A to Y2 and pin B to P1. Repair open. Then go to  34-30. Less than or equal to 10,000 ohms on either readings. Greater  than 10,000 ohms or open on both readings. Signal line (ckt #432) is shorted to the return line (ckt #452). Repair short. Then go to 34-30. Then go to 34-7. Terminals and connectors are okay. Problem  found. Replace ECM (para 7-29.1). Then go to 34-30. Repair  terminals/connectors (para 7-77). Then go to 34-30. H-171

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