Table of Contents
Advertisement
P0530-A/C PRESSURE SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH
—
Continued
TEST
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?
Yes → Repair as necessary.
→ Test Complete.
No
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?
Yes → Go To 11
→ Go To 15
No
11
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Turn the ignition on.
With the DRBIII , monitor the A/C Pressure Sensor voltage.
Is the voltage above 0.7 volt?
Yes → Replace the A/C Pressure Sensor.
→ Go To 12
No
12
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the A/C Pressure Sensor Signal circuit.
Is the resistance above 100 kohms?
Yes → Go To 13
→ Repair the A/C Pressure Sensor Signal circuit for a short to
No
ACTION
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
ground.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
115
APPLICABILITY
All
All
All
All
Advertisement
Table of Contents
