Dodge Dakota (R1). Manual — part 831
Symptom:
P0108-MAP SENSOR VOLTAGE TOO HIGH
When Monitored and Set Condition:
P0108-MAP SENSOR VOLTAGE TOO HIGH
When Monitored:
With the engine RPM above 400, the TPS voltage less than 1.13 volt,
and battery voltage greater than 10.4 volts
Set Condition:
The MAP sensor signal voltage is greater than 4.88 volts at start or with
the engine running for 2.2 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
MAP SENSOR SIGNAL CIRCUIT SHORTED TO 5 VOLT SUPPLY CIRCUIT
MAP SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
MAP SENSOR INTERNAL FAILURE
MAP SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
PCM
TEST
ACTION
APPLICABILITY
1
Start the engine.
With the DRBIII
t, read the MAP Sensor voltage.
Is the voltage above 4.6 volts?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance between the MAP Sensor Signal circuit and the 5 Volt Supply
circuit in the MAP Sensor harness connector.
Is the resistance below 5 ohms?
All
Yes
→
Repair the MAP Sensor Signal circuit for a short to the 5 Volt
Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
56
DRIVEABILITY - GAS
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Turn the ignition on.
Measure the voltage of the MAP Sensor Signal circuit in the MAP Sensor harness
connector.
Is the voltage above 5.2 volts?
All
Yes
→
Repair the MAP Sensor Signal circuit for a short to battery
voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
4
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Connect a jumper wire between the MAP Sensor Signal circuit and the Sensor
ground circuit.
With the DRBIII
t, monitor the MAP Sensor voltage.
Turn the ignition on.
Is the voltage below 1.0 volts?
All
Yes
→
Replace the MAP Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
5
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the MAP Sensor Signal circuit between the MAP Sensor
harness connector and the PCM harness connector.
Is the resistance below 5 ohms?
All
Yes
→
No
→
Repair the MAP Sensor Signal circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance of the Sensor ground circuit in the MAP Sensor harness
connector to ground.
Is the resistance below 5 ohms?
All
Yes
→
No
→
Repair the Sensor ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
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.
57
DRIVEABILITY - GAS
P0108-MAP SENSOR VOLTAGE TOO HIGH —
Continued
TEST
ACTION
APPLICABILITY
8
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.
NOTE: The conditions that set the DTC are not present at this time. The
following list below may help in indentifying the intermittent condition.
While the engine is running at normal operating temperatures, monitor the DRBIII
t
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 and 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.
No
→
Test Complete.
58
DRIVEABILITY - GAS
P0108-MAP SENSOR VOLTAGE TOO HIGH —
Continued
Symptom:
P0111-INTAKE AIR TEMP PERFORMANCE
POSSIBLE CAUSES
INTERMITTENT CONDITION
IAT SENSOR VOLTAGE BELOW 1.0 VOLTS
SENSOR GROUND CIRCUIT HIGH RESISTANCE
IAT SENSOR SIGNAL CIRCUIT HIGH RESISTANCE
PCM
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read DTC’s.
Is the Good Trip display and equal to zero?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the Inlet Air Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
t, read the IAT voltage.
Is the voltage above 4.6 volts?
All
Yes
→
No
→
3
Turn the ignition off.
Disconnect the Intake Air Temperature Sensor harness connector.
Using a jumper wire, jumper across the IAT Sensor harness connector.
Turn the ignition on.
With the DRBIII
t, read the IAT voltage.
Is the voltage below 1.0 volt?
All
Yes
→
Replace the Intake Air Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
4
NOTE: Ensure the voltmeter leads meet the terminals in the connector and
that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity
Perform a voltage drop test by backprobing between the Sensor ground circuit at the
IAT Sensor harness connector and PCM harness connector.
Start the engine.
Allow the engine to idle.
Is the voltage below 0.10 volt?
All
Yes
→
No
→
Repair the high resistance in the Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
59
DRIVEABILITY - GAS
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