Dodge Viper SRT-10 (ZB). Manual — part 416
Symptom List:
P0171-1/1 FUEL SYSTEM LEAN
P0174-2/1 FUEL SYSTEM LEAN
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0171-1/1 FUEL SYSTEM LEAN.
When Monitored and Set Condition:
P0171-1/1 FUEL SYSTEM LEAN
When Monitored:
With the engine running in closed loop mode, the ambient/battery
temperature above 20° F and altitude below 8000 ft.
Set Condition:
If the PCM multiplies short term compensation by long term adaptive and
a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates
and a trouble code is stored.
P0174-2/1 FUEL SYSTEM LEAN
When Monitored:
With the engine running in closed loop mode, the ambient/battery
temperature above 20° F and altitude below 8000 ft.
Set Condition:
If the PCM multiplies short term compensation by long term adaptive and
a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates
and a trouble code is stored.
POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
FUEL PRESSURE OUT OF SPECS
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
O2 SENSOR
O2 SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
O2 SENSOR HEATER OPERATION
TP SENSOR VOLTAGE GREATER THAN 0.92 OF A VOLT WITH THROTTLE CLOSED
TP SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR
INTERMITTENT CONDITION
PCM
71
DRIVEABILITY - GAS
TEST
ACTION
APPLICABILITY
1
NOTE: Check for contaminates 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 (Diagnos-
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
2
Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Install a fuel pressure gauge.
Ignition on, engine not running.
With the DRBIII
t, actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 379 KPa +/- 14 KPa (55 psi +/- 2 psi).
Turn the ignition off.
Choose a conclusion that best matches your fuel pressure reading.
All
Below Specification
Within Specification
Above Specification
Replace the fuel filter/pressure regulator.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
CAUTION: Stop All Actuations.
3
Turn the ignition off.
Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Raise vehicle on hoist, and disconnect the fuel pressure line at the fuel pump module.
Install special 5/16 fuel line adapter tool #6539 or #6631 for 3/8 fuel line adapter,
between the disconnected fuel line and the fuel pump module.
Attach a fuel pressure test gauge to the T fitting on tool #6539 or #6631.
Ignition on, engine not running.
With the DRBIII
t, actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 379 KPa +/- 14 KPa (55 psi +/- 2 psi).
Is the fuel pressure within specification?
All
Yes
→ Repair or replace fuel supply line as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 4
Caution: Stop All Actuations.
72
DRIVEABILITY - GAS
P0171-1/1 FUEL SYSTEM LEAN —
Continued
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
WARNING: The fuel system is under a constant pressure (even with the
engine off). Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer.
Is the Fuel Inlet Strainer plugged?
All
Yes
→ Replace the Fuel Pump Inlet Strainer.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 5
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the Fuel Pump Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor and Exhaust
System to cool down before continuing the test.
Ignition on, engine not running.
With the DRBIII
t, read the O2 Sensor voltage.
Is the voltage above 4.5 volts?
All
Yes
→ Go To 7
No
→ Go To 13
7
Turn the ignition off.
NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor to cool down
before continuing the test.
Ignition on, engine not running.
With the DRBIII
t, actuate the O2 Heater Test.
With the DRBIII
t, monitor O2 Sensor voltage for at least 2 minutes.
Does the voltage stay above 4.5 volts?
All
Yes
→ Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 8
8
With the DRBIII
t, read TP Sensor voltage.
NOTE: The throttle must be against the stop.
Is the voltage 0.92 of a volt or less with the Throttle closed?
All
Yes
→ Go To 9
No
→ Check for a binding throttle condition. If OK, replace the Throttle
Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
9
With the DRBIII
t, read the TP Sensor voltage.
While monitoring the DRBIII
t, slowly open and close the throttle.
Does the voltage increase and decrease smoothly?
All
Yes
→ Go To 10
No
→ Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
73
DRIVEABILITY - GAS
P0171-1/1 FUEL SYSTEM LEAN —
Continued
TEST
ACTION
APPLICABILITY
10
Turn the ignition off.
Connect a Vacuum Gauge to a Manifold Vacuum source.
Start the engine.
Allow the engine to idle.
Note: If engine will not idle, maintain a constant RPM above idle.
With the DRBIII
t in Sensors, read the MAP Sensor vacuum value.
Is the DRBIII
t reading within 19 of the Vacuum Gauge reading?
All
Yes
→ Go To 11
No
→ Replace the MAP Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
NOTE: Remove the vacuum gauge before continuing.
11
Note: For this test to be valid, the thermostat must be operating correctly.
Note: This test works best if performed on a cold engine (cold soak)
Ignition on, engine not running.
With the DRBIII
t, read the Engine Coolant Temperature Sensor value. If the engine
was allowed to sit overnight (cold soak), the temperature value should be a sensible
value that is somewhere close to the ambient temperature.
Note: If engine coolant temperature is above 82°C (180°F), allow the engine
to cool until 65°C (150°F) is reached.
Start the Engine.
During engine warm-up, monitor the Engine Coolant Temperature value. The temp
value change should be a smooth transition from start up to normal operating temp
82°C (180°F). The value should reach at least 82°C (180°F).
Did the Engine Coolant Temperature increase smoothly and did it reach at least 82°C
(180°F)?
All
Yes
→ Go To 12
No
→ Replace the Engine Coolant Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
12
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.
No
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
74
DRIVEABILITY - GAS
P0171-1/1 FUEL SYSTEM LEAN —
Continued
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст