2006 DODGE RAM SRT-10 sensor

P0237-MAP SENSOR VOLTAGE TOO LOW
For a complete wiring diagramRefer to Section 8W.

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time.
Possible Causes
OTHER DTC’S
(K37) SIGNAL CIRCUIT SHORTED TO (K916) SENSOR RETURN CIRCUIT
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K916) SENSOR RETURN CIRCUIT
MAP SENSOR
(K37) SIGNAL CIRCUIT OPEN
(F855) 5-VOLT SUPPLY CIRCUIT OPEN
MAP SENSOR (K37) SIGNAL CIRCUIT SHORT TO GROUND
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S
Turn the ignition on.
With the scan tool, read the Engine DTC’s.
Is there a 5-volt Supply DTC set?
Ye s>>
Refer to symptom list for problems related to the 5-volt Supply DTC.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 2
2.HIGH VOLTAGE
Turn the ignition off.
Disconnect the Map sensor harness connector.
Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage between the (F855) 5-volt supply circuit and sen-
sor (K916) return circuit of the Map sensor harness connector.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Go To 3
No>>
Go To 4

3.MAP SENSOR
While monitoring the scan tool, jumperthe (F855) 5-volt supply circuit to
the (K37) signal circuit in the Map sensor harness connector.
Did the P0238-MAP SENSOR VOLTAGE TOO HIGH, DTC set?
Ye s>>
Replace the MAP sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Go To 4
4.(K37) SIGNAL CIRCUIT SHORTED TO (K916) SENSOR RETURN CIRCUIT
Turn the ignition off.
Disconnect the ECM harness 60 pin connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the (K37) signal circuit and (K916)
sensor return circuit in the MAP sensor harness connector.
Is the resistance greater than 100 K Ohms?
No>>
Repair (K37) signal circuit shorted to (K916) sensor return
circuit or replace harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
Ye s>>
Go To 5
5.(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K916) SENSOR RETURN CIRCUIT
Measure the resistance between the (F855) 5-volt supply circuit and
(K916) sensor return circuit in the MAP sensor harness connector.
Is the resistance greater than 100 K Ohms?
No>>
Repair (F855) 5-volt supply circuit shorted to (K916)) sensor
return circuit or replace harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
Ye s>>
Go To 6

6.(K37) SIGNAL CIRCUIT OPEN
Measure the resistance between the signal (K37) circuit in the Map sen-
sor harness connector with the (K37) signal circuit in the ECM harness
connector.
Is the resistance less than 10 Ohms?
Ye s>>
Go To 7
No>>
Repair or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
7.(F855) 5-VOLT SUPPLY CIRCUIT OPEN
Measure the resistance between the (F855) 5-volt supply circuit in the
Map sensor harness connector with the (F855) 5-volt supply circuit in
the ECM harness connector.
Is the resistance less than 10 Ohms?
Ye s>>
Go To 8
No>>
Repair or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

8.MAP SENSOR SIGNAL (K37) CIRCUIT SHORTED TO GROUND
Measure the resistance between the MAP Sensor Signal (K37) circuit
and the Battery negative terminal.
Is the resistance above 100k ohms?
Ye s>>
Go To 9
No>>
Repair the MAP Sensor (K37) Signal circuit for a short to
ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
9.(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K916) RETURN CIRCUIT OR GROUND
Measure the resistance between the (F855) 5-volt supply circuit in the
sensor harness connector and battery negative.
Is the resistance above 100k ohms?
Ye s>>
Go To 10
No>>
Te s t C o m p l e t e .
10.ECM
Reconnect the ECM harness 60 pin connector.
While monitoring the scan tool, jumperthe (F855) 5-volt supply circuit to
the (K37) signal circuit in the map sensor harness connector.
Did the P0238-MAP SENSOR VOLTAGE TOO HIGH, DTC set?
Ye s>>
Te s t C o m p l e t e .
No>>
Replace and program the ECM in accordance with the Ser-
vice Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

P0238-MAP SENSOR VOLTAGE TOO HIGH
For a complete wiring diagramRefer to Section 8W.

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The circuit voltage to the ECM is above a calibrated threshold for a certainperiod of time.
Possible Causes
OTHER DTC’S
(K37) SIGNAL CIRCUIT SHORTED TO BATTERY
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY
MAP SENSOR
(K37) SIGNAL CIRCUIT SHORT TO SUPPLY
(F855) 5-VOLT SUPPLY CIRCUIT SHORT TO BATTERY
INTERMITTENT
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S
Turn the ignition on.
With the scan tool, read the Engine DTC’s.
Is there a 5-volt Supply DTC set?
Ye s>>
Refer to symptom list for problems related to the 5-volt Supply DTC.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 2
2.HIGH VOLTAGE
Turn the ignition off.
Disconnect the Map sensor harness connector.
Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage between the (F855) 5-volt supply circuit and
(K916) sensor return circuit of the Map sensor harness connector.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Go To 3
No>>
Go To 4

3.MAP SENSOR
While monitoring scan tool, use a jumper wire to connect the (K916)
return circuit with the (K37) signal circuit at the sensor connector.
Did the P0237-MAP SENSOR VOLTAGE TOO LOW, DTC set?
Ye s>>
Go To 4
No>>
Replace the MAP sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
4.(K37) SIGNAL CIRCUIT SHORTED TO BATTERY
Disconnect the ECM harness connectors.
Check connectors - Clean/repair as necessary.
Measure the voltage between the (K37) signal circuit at the MAP sensor
harness connector and Battery Negative.
Is the voltage greater than 1 volt?
Ye s>>
Repair (K37) signal circuit shorted to Battery or replace har-
ness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Go To 5
5.(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY
Measure the voltage between the (F855) 5-volt supply circuit at the
MAP sensor harness connector and Battery negative.
Is the voltage greater than 1 volt?
Ye s>>
Repair (F855) 5-volt supply circuit shorted to Battery or
replace harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Go To 6