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DTC Troubleshooting

DIAGNOSIS PROCEDURE - DTC P0533 A/C PRESSURE SENSOR CIRCUIT HIGH INPUT

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD) System Check. Was the check performed? - Go to Step 2. Go to "ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK ".
2
  1. Install a scan tool to the Data Link Connector (DLC).
  2. Idle the engine.

Does the scan tool display Air Conditioning Pressure (ACP) sensor voltage below the specified value?		 0.06 V Go to Step 3. Go to Step 4.
3
  1. Turn the ignition OFF.
  2. Disconnect the ACP sensor connector.
  3. Jumper the ACP signal circuit, terminal 2 to the 5 V reference circuit, terminal 1.
  4. Turn the ignition switch to ON.

Does the ACP voltage read more than the specified value?		 4.9 V Go to Step 5. Go to Step 6.
4
  1. Turn the ignition ON, with the engine OFF.
  2. Operate the vehicle within the Failure Record conditions and Conditions For Setting the DTC as noted.

Does the scan tool display ACP voltage below the specified value?		 0.06 V Go to Step 3. Go to "DIAGNOSTIC AIDS ".
5 Inspect the ACP sensor harness connector terminals for the following conditions:
  • Poor connections
  • Proper contact tension
  • Poor terminal-to-wire connection

Is a problem found?		 - Go to Step 8. Go to Step 9.
6
  1. Turn the ignition OFF.
  2. Remove the jumper wire.
  3. Probe the ACP sensor signal circuit terminal 2 with a test light to B+.
  4. Turn the ignition ON.

Does the scan tool read over the specified value?		 4V Go to Step 7. Go to Step 11.
7 Check the ACP sensor 5 V reference circuit for an open or short to ground and repair as needed.
Is the repair complete?		 - Go to Step 13. Go to Step 10.
8 Repair the connection terminals as necessary.
Is the repair complete?		 - Go to Step 13. -
9
  1. Turn the ignition OFF.
  2. Replace the ACP sensor.

Is the repair complete?		 - Go to Step 13. -
10
  1. Turn the ignition OFF.
  2. Replace the engine control module (ECM).

Is the repair complete?		 - Go to Step 13. -
11 Check the ACP sensor signal circuit for the following conditions:
  • Open
  • Short to ground
  • Short to sensor ground

Is a problem found?		 - Go to Step 12. Go to Step 10.
12 Repair the A/C Pressure sensor signal circuit.
Is the repair complete?		 - Go to Step 13. -
13
  1. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the Conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic has run and passed?		 - Go to Step 14. Go to Step 2.
14 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC TABLE . System OK
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