Dodge ZB 2005 Service Manual page 1196

P0171-1/1 FUEL SYSTEM LEAN —
TEST
13 NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor to cool down
before continuing the test.
Ignition on, engine not running.
Disconnect the O2 Sensor harness connector.
With the DRBIII , monitor the O2 Sensor voltage.
Is the O2 Sensor voltage above 4.5 volts?
Yes → Replace the O2 Sensor
→ Go To 14
No
14 Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the O2 Sensor Signal circuit at the PCM
harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the O2 Sensor Signal circuit.
→ Go To 15
No
15 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 - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
75
APPLICABILITY
All
All
All