Dodge 2004 Neon SRT4, Diagnostic Manual

Page: 613 / 922

TEST ACTION APPLICABILITY
1 NOTE: Check the vehicle repair history. If the O2 has been replace ensure
that the O2 sensor was properly installed and meets OEM specification.
NOTE: Check for contaminants that may have damaged the O2 Sensor:
contaminated fuel, unapproved silicone, oil and coolant.
Ignition on, engine not running.
With the DRBIII
t
, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
All
Yes
→
Go To 2
No
→
Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
2 Turn the ignition off.
WARNING: To avoid personal injury from the exhaust system being hot,
allow the exhaust to cool down to a safe temperature before performing a
physical inspection.
Visually and Physically inspect the for holes, cracks and blockage in the exhaust
system.
Is the exhaust system is good condition? All
Yes
→
Go To 3
No
→
Repair or Replace as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
3 Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks.
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to
correct injector
Are there any engine mechanical problems? All
Yes
→
Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→
Go To 4
4 Ignition on, engine not running.
Disconnect the O2 Sensor harness connector.
With the DRBIII
t
, monitor the O2 Sensor voltage.
The O2 Sensor voltage should read 5.0 volts on the DRBIII
t
with the connector
disconnected.
Using a jumper wire, jump the O2 Signal circuit to the O2 Return circuit at the O2
Sensor harness connector.
NOTE: The voltage should drop from 5.0 volts to 2.5 volts with the jumper
wire in place.
Did the O2 Sensor volts change from 5.0 volts to 2.5 volts?
All
Yes
→
Replace the O2 Sensor
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→
Go To 5
277
DRIVEABILITY - NGC
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN —
Continued