TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Measure the resistance between ground and the Sensor Ground circuit.
Is the resistance below 30 ohms?
All
Yes
→ Go To 8
No
→ Repair the Sensor Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
8
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
9
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running and at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Test Complete.
10
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Sensor Reference Voltage B circuit in the A/C Pressure
Sensor harness connector.
Is the voltage between 4.5 and 5.5 volts?
All
Yes
→ Go To 11
No
→ Go To 15
11
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Turn the ignition on.
With the DRBIII
t, monitor the A/C Pressure Sensor voltage.
Is the voltage above 0.7 volt?
All
Yes
→ Replace the A/C Pressure Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 12
115
DRIVEABILITY - DIESEL
P0530-A/C PRESSURE SENSOR CIRCUIT PLAUSIBILITY —
Continued