Dodge Dakota (R1). Manual - part 844

TEST

ACTION

APPLICABILITY

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

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Replace the Fuel Pump Inlet Strainer.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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Go To

If there are no possible causes remaining, view repair.

All

Repair

Replace the Fuel Pump Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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

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Go To

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Go To

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

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Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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Go To

NOTE: The engine must be at operating temperature and in closed loop to
perform this test.
Start the engine.
Allow the engine to reach normal operating temperature.
With the DRBIII

t select System Tests, perform the Purge Vapors Test.

Observe the Short Term Adaptive value and press 3 to flow.
NOTE: Short Term Adaptive value change.
Did the Short Term Adaptive value change?

All

Yes

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Go To

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Refer to the Driveability category and perform the appropriate
symptomm.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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TEST

ACTION

APPLICABILITY

Turn the ignition on.
With the DRBIII

t, read TPS voltage.

NOTE: The throttle must be against the stop.
Is the voltage 0.92 or less with the Throttle closed?

All

Yes

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Go To

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Check for a binding throttle condition. If OK, replace the Throttle
Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

Turn the ignition on.
With the DRBIII

t, read the TPS voltage.

While monitoring the DRBIII

t, slowly open and close the throttle.

Does the voltage increase and decrease smoothly?

All

Yes

→

Go To

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Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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 DRB reading within 1

9 of the Vacuum Gauge reading?

All

Yes

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Go To

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Replace the MAP Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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)
Turn the ignition on.
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 value increase a smooth transition and did it
reach at least 82°C

All

Yes

→

Go To

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Replace the Engine Coolant Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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TEST

ACTION

APPLICABILITY

Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from restrictions.
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.

→

Test Complete.

Turn the ignition on.
Disconnect the O2 Sensor harness connector.
With the DRBIII

t, monitor the O2 Sensor voltage.

Is the O2 Sensor voltage between 0.4 to 0.6 volt?

All

Yes

→

Replace the O2 Sensor
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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Go To

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the O2 Sensor harness connector.
Measure the resistance of the O2 Sensor Signal circuit between the PCM harness
connector and the O2 Sensor harness connector.
Is the resistance below 5.0 ohms?

All

Yes

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Go To

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Check for O2 Sensor Signal circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Start the engine.
Measure the voltage of the O2 Sensor Signal circuit in the PCM harness connector.
Is the voltage above 0.60 volt?

All

Yes

→

Repair the O2 Sensor Signal for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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Go To

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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TEST

ACTION

APPLICABILITY

NOTE: Check for contaminates that may have damaged the O2 Sensor:
contaminated fuel, unapproved silicone, oil and coolant.
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRBIII

parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DRBIII

t Freeze Frame information. If possible, try to duplicate the

conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→

Repair as necessary
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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Test Complete.

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