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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Diagnosis - Automatic Transmission - Coupe) >> Automatic Transaxle Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 15: Vehicle Shifts Differently with A/C Engaged >> Diagnosis

INSPECTION PROCEDURE 15: Vehicle Shifts Differently with A/C Engaged: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tool: 

  1. STEP 1. Using scan tool MB991502, check data list item 65: Dual Pressure Switch. 
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Start the engine and run at idle.
    3. Set scan tool MB991502 to data reading mode for item 65: Dual Pressure Switch.
      • When the A/C is in operation, the scan tool MB991502 display should be "ON."
      • When the A/C is not in operation, the scan tool MB991502 display should be "OFF."
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the switch operating properly? 

    YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS .

    NO:  Go to Step 2.

    Fig 1: Dual Pressure Switch System - Circuit Diagram (2 Of 2)
    G04542443Courtesy of CHRYSLER CORP.
  2. STEP 2. Check dual pressure switch connector A-36 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to Step 3.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 2: Identifying Dual Pressure Switch Connector A-36
    G04542444Courtesy of CHRYSLER CORP.
  3. STEP 3. Measure the power supply voltage at dual pressure switch connector A-36. 
    1. Disconnect the connector A-36 and measure at the harness side.
    2. Start the engine and run at idle.
    3. Operate the A/C.
      Fig 3: Identifying Dual Pressure Switch Connector A-36
      G04542445Courtesy of CHRYSLER CORP.
    4. Measure the voltage between terminal 2 and ground.
      • Voltage should measure battery positive voltage.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage battery positive voltage? 

    YES  : Go to  Step 10.

    NO:  Go to Step 4.

    Fig 4: Measuring Voltage Between Terminal 2 And Ground
    G04542446Courtesy of CHRYSLER CORP.
  4. STEP 4. Measure the power supply voltage at automatic compressor controller connector C-14 by backprobing. 
    1. Do not disconnect connector C-14.
    2. Start the engine and run at idle.
    3. Operate the A/C.
      Fig 5: Identifying Automatic Compressor Controller Connector C-14
      G04542447Courtesy of CHRYSLER CORP.
    4. Measure the voltage between terminal 4 and ground by backprobing.
      • Voltage should measure battery positive voltage.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage battery positive voltage? 

    YES  : Go to  Step 8.

    NO:  Go to Step 5.

    Fig 6: Measuring Voltage Between Terminal 4 And Ground By Backprobing
    G04542448Courtesy of CHRYSLER CORP.
  5. STEP 5. Check intermediate connector C-212 and automatic compressor controller connector C-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to Step 6.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 7: Identifying Intermediate Connector Terminal C-212
    G04542449Courtesy of CHRYSLER CORP.
    Fig 8: Identifying Automatic Compressor Controller Connector C-14
    G04542450Courtesy of CHRYSLER CORP.
  6. STEP 6. Check the harness for short circuit to ground between dual pressure switch connector A-36 terminal 2 and automatic compressor controller connector C-14 terminal 4. 

    Q: Is the harness wire in good condition? 

    YES  : Go to Step 7.

    NO:  Repair or replace the harness wire.

    Fig 9: Identifying Dual Pressure Switch Connector A-36
    G04542451Courtesy of CHRYSLER CORP.
    Fig 10: Identifying Automatic Compressor Controller Connector C-14
    G04542452Courtesy of CHRYSLER CORP.
  7. STEP 7. Using scan tool MB991502, check data list item 65: Dual Pressure Switch. 
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Start the engine and run at idle.
    3. Set scan tool MB991502 to data reading mode for item 65: Dual Pressure Switch.
      • When the A/C is in operation, the scan tool display should be "ON."
      • When the A/C is not in operation, the scan tool display should be "OFF."
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the switch operating properly? 

    YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS .

    NO:  Check the air conditioning system. Refer to TROUBLESHOOTING STRATEGY .

    Fig 11: Connecting Scan Tool To Data Link Connector
    G04542453Courtesy of CHRYSLER CORP.
  8. STEP 8. Check intermediate connector C-212 and automatic compressor controller connector C-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to Step 9.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 12: Identifying Intermediate Connector Terminal C-212
    G04542454Courtesy of CHRYSLER CORP.
    Fig 13: Locating Automatic Compressor Controller Connector C-14
    G04542455Courtesy of CHRYSLER CORP.
  9. STEP 9. Check the harness for open circuit between dual pressure switch connector A-36 terminal 2 and automatic compressor controller connector C-14 terminal 4. 

    Q: Is the harness wire in good condition? 

    YES  : Go to  Step 14.

    NO:  Repair or replace the harness wire.

    Fig 14: Identifying Dual Pressure Switch Connector A-36
    G04542456Courtesy of CHRYSLER CORP.
    Fig 15: Locating Automatic Compressor Controller Connector C-14
    G04542457Courtesy of CHRYSLER CORP.
  10. STEP 10. Measure the switch output voltage at PCM connector C-117 < 2.4L Engine > or C-119 < 3.0L Engine > by backprobing. 
    1. Do not disconnect connector C-117 < 2.4L Engine > or C-119 < 3.0L Engine >.
    2. Start the engine and run at idle.
    3. Operate the A/C.
      Fig 16: Locating PCM Connector Terminal C-117 And C-119
      G04542458Courtesy of CHRYSLER CORP.
    4. Measure the voltage between terminal 83 and ground by backprobing.
      • When the A/C is in operation, the voltage should measure battery positive voltage.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage battery positive voltage? 

    YES  : Go to  Step 15.

    NO:  Go to Step 11.

    Fig 17: Measuring Voltage Between Terminal 83 And Ground By Backprobing
    G04542459Courtesy of CHRYSLER CORP.
  11. STEP 11. Check intermediate connectors C-25, C-212 and PCM connector C-117 < 2.4L Engine > or C-119 < 3.0L Engine > for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to Step 12.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 18: Identifying Intermediate Connector Terminal C-25
    G04542460Courtesy of CHRYSLER CORP.
    Fig 19: Identifying Intermediate Connector Terminal C-212
    G04542461Courtesy of CHRYSLER CORP.
    Fig 20: Locating PCM Connector Terminal C-117 And C-119
    G04542462Courtesy of CHRYSLER CORP.
  12. STEP 12. Check harness for open circuit or short circuit to ground between dual pressure switch connector A-36 terminal 1 and PCM connector C-117 < 2.4L Engine > or C-119 < 3.0L Engine > terminal 83. 

    Q: Is the harness wire in good condition? 

    YES  : Go to Step 13.

    NO:  Repair or replace the harness wire.

    Fig 21: Identifying Dual Pressure Switch Connector A-36
    G04542463Courtesy of CHRYSLER CORP.
    Fig 22: Locating PCM Connector Terminal C-117 And C-119
    G04542464Courtesy of CHRYSLER CORP.
  13. STEP 13. Check the dual pressure switch. 

    Refer to DUAL PRESSURE SWITCH CHECK .

    Q: Is the switch operating properly? 

    YES  : Go to Step 14.

    NO:  Replace the dual pressure switch. Refer to REFRIGERANT LINE .

  14. STEP 14. Using scan tool MB991502, check data list item 65: Dual Pressure Switch. 
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Start the engine and run at idle.
    3. Set scan tool MB991502 to data reading mode for item 65: Dual Pressure Switch.
      • When the A/C is in operation, the scan tool display should be "ON."
      • When the A/C is not in operation, the scan tool display should be "OFF."
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the switch operating properly? 

    YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS .

    NO:  Replace the PCM.

    Fig 23: Connecting Scan Tool To Data Link Connector
    G04542465Courtesy of CHRYSLER CORP.
  15. STEP 15. Check PCM connector C-117 < 2.4L Engine > or C-119 < 3.0L Engine > for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to  Step 14.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 24: Locating PCM Connector Terminal C-117 And C-119
    G04542466Courtesy of CHRYSLER CORP.
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