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P1598-A/C PRESSURE SENSOR VOLTAGE TOO HIGH (CONTINUED) For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE (C18) A/C PRESSURE SIGNAL CIRCUIT OPEN (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT (K900) SENSOR GROUND CIRCUIT OPEN A/C PRESSURE SENSOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. A/C PRESSURE SENSOR VOLTAGE ABOVE 4.9 VOLTS NOTE: Make sure the A/C refrigerant System is properly charged per the Service Information. With the scan tool, read DTCs and record the related Freeze Frame data. Start the engine. With the scan tool, read the A/C Pressure Sensor voltage. Is the voltage above 4.9 volts? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 1990 ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10 DR/DH |