DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 124

DRIVEABILITY - DIESEL
P0530-A/C PRESSURE SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH
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Continued
TEST
13 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the A/C Pressure Sensor Signal circuit and the
Sensor Ground circuit.
Is the resistance above 100 kohms?
Yes → Go To 14
→ Repair the A/C Pressure Sensor Signal circuit for a short to the
No
14 If there are no possible causes remaining, view repair.
Repair
15 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Reference Voltage B circuit.
Is the resistance below 5 ohms?
Yes → Go To 16
→ Repair the Sensor Reference Voltage B circuit for an open.
No
16 If there are no possible causes remaining, view repair.
Repair
ACTION
Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
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APPLICABILITY
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