Dodge ZB 2005 Service Manual page 1297

DRIVEABILITY - GAS
P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW —
TEST
3 With the DRBIII , monitor the A/C Pressure Sensor voltage with the Sensor
disconnected.
Is the voltage above 0.6 of a volt?
Yes → Replace the A/C Pressure Sensor.
→ Go To 4
No
4 Turn the ignition off.
Disconnect the PCM harness connectors.
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?
Yes → Repair the short to ground in the (C18) A/C Pressure Signal
→ Go To 5
No
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?
Yes → Repair the short between the (K900) Sensor ground and the (C18)
→ Go To 8
No
6 Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance of the (F888) 5-volt Supply circuit between the A/C Pressure
Sensor harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 7
→ Repair the open in the (F888) 5-volt Supply circuit.
No
7 Measure the resistance between the (F888) 5-volt Supply circuit and ground in the
A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (F888) 5-volt Supply circuit.
→ Go To 8
No
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.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 2.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
A/C Pressure Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
176
Continued
APPLICABILITY
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