Dodge Dakota (R1). Manual — part 842
TEST
ACTION
APPLICABILITY
10
Turn ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Perform a wiggle test on the related wiring harnesses with the engine running.
Watch for the Good Trip Counter to change to 0.
Were any problems found?
All
Yes
→
Repair wiring harness/connectors as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Test Complete.
100
DRIVEABILITY - GAS
P0136-1/2 O2 SENSOR HEATER CIRCUIT MALFUNCTION —
Continued
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 deg. 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 deg. 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
INTERMITTENT CONDITION
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
TPS VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE CLOSED
THROTTLE POSITION SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR (HIGH)
PCM
101
DRIVEABILITY - GAS
TEST
ACTION
APPLICABILITY
1
NOTE: Check for contaminates that may have damaged the O2 Sensor:
contaminated fuel, unapproved silicone, oil and coolant.
Turn the ignition on.
With the DRBIII
t, read DTC’s.
Is the Good Trip counter displayed and equal to zero?
All
Yes
→
No
→
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 to the fuel rail. (2.7L use the fuel adapter #6539 or
#6631 Miller Tool)
Turn the ignition on.
With the DRBIII
t, actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 339 KPa +/- 34 KPa (49.2 psi +/- 5 psi).
Turn the ignition off.
Choose a conclusion that best matches your fuel pressure reading.
All
Below Specification
Within Specification
Above Specification
Test Complete.
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 between disconnected fuel
line and the fuel pump module.
Attach a fuel pressure test gauge to the T fitting on tool #6539 or #6631.
Turn the ignition on.
With the DRBIII
t, actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 339 KPa +/- 34 KPa (49.2 psi +/- 5 psi).
Is the fuel pressure within specification?
All
Yes
→
Repair or replace fuel supply line as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Caution: Stop All Actuations.
102
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
→
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 on
With the DRBIII
t, read the O2 Sensor voltage.
Is the voltage between 0.4 to 0.6 volt?
All
Yes
→
No
→
7
Turn the ignition off.
NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor to cool down
before continuing the test. Allow the O2 Sensor voltage to stabilize between
0.4 to 0.6 volts.
Turn the ignition on.
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 between 0.4 and 0.6 volt?
All
Yes
→
Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
8
Turn the ignition on.
With the DRBIII
t, read TP Sensor voltage.
NOTE: The throttle must be against the stop.
Is the voltage 0.92 or less with the Throttle closed?
All
Yes
→
No
→
Check for a binding throttle condition. If OK, replace the Throttle
Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
9
Turn the ignition on.
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 decease smoothly?
All
Yes
→
No
→
Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
103
DRIVEABILITY - GAS
P0171-1/1 FUEL SYSTEM LEAN —
Continued
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