Dodge ZB 2005 Service Manual page 1296

Symptom:
P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW
When Monitored and Set Condition:
P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW
When Monitored: With the engine running and the A/C Relay energized.
Set Condition: The A/C Pressure Sensor Signal voltage at the PCM goes below 0.58 volts
for 2.6 seconds.
A/C PRESSURE SENSOR VOLTAGE BELOW 0.6 OF A VOLT
(F888) 5-VOLT SUPPLY CIRCUIT OPEN
(F888) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
A/C PRESSURE SENSOR
(C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
(C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
PCM
TEST
1 NOTE: Ensure the A/C refrigerant System is properly charged per the
Service Information.
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Start the engine.
With the DRBIII , read the A/C Pressure Sensor voltage.
Is the voltage below 0.60 of a volt?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the (F888) 5-volt Supply circuit in the A/C Pressure Sensor
harness connector.
Is the voltage between 4.5 to 5.2 volts?
Yes → Go To 3
→ Go To 6
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 2.
DRIVEABILITY - GAS
175
APPLICABILITY
All
All