TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the C3 PCM harness connector.
Measure the resistance between ground and the (C18) A/C Pressure Signal circuit in
the A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (C18) A/C Pressure Signal
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
No
→ Go To 5
5
Measure the resistance between the (C18) A/C Pressure Signal circuit and the (K900)
Sensor ground circuit in the A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short between the (K900) Sensor ground circuit and
the (C18) A/C Pressure Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
No
→ Go To 8
6
Turn the ignition off.
Disconnect the C1 and C3 PCM harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (F856) 5-volt Supply circuit from the A/C Pressure
Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 7
No
→ Repair the open in the (F856) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
7
Measure the resistance between ground and the (F855) 5-volt Supply circuit in the
A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (F856) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
No
→ Go To 8
8
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
201
DRIVEABILITY - NGC
P0532-A/C PRESSURE SENSOR LOW —
Continued