Dodge Ram Truck 1500-2500-3500. Manual — part 1114

P0652-LOW VOLTAGE AT THE #1 SENSOR SUPPLY CIRCUIT (CONTINUED)

5.

MAP SENSOR

While monitoring with the scan tool, disconnect the map sensor.

Is DTC P0652 set?

Yes

>> Go To 6

No

>> Replace the MAP sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

6.

CAMSHAFT POSITION SENSOR

While monitoring with the scan tool, disconnect the Camshaft position sensor.

Is DTC P0652 set?

Yes

>> Go To 7

No

>> Replace the Camshaft position sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

7.

(F855) #1 5-VOLT SUPPLY SHORTED

Measure the resistance between the (F855) #1 sensor supply circuit of
the ECM harness connector and all other circuits in both ECM harness
connectors.

Is the resistance greater than 100K Ohms?

Yes

>> Refer to the INTERMITTENT CONDITION Symptom

(Diagnostic Procedure). (Refer to 9 - ENGINE - DIAGNO-
SIS AND TESTING)

No

>> Repair the shorted circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

9 - 1378

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0653-HIGH VOLTAGE AT THE #1 SENSOR SUPPLY CIRCUIT

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1379

P0653-HIGH VOLTAGE AT THE #1 SENSOR SUPPLY CIRCUIT (CONTINUED)

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the engine is running.

•

Set Condition:
Voltage detected on the sensor supply is above a calibrated value.

Possible Causes

ECM

(F855) 5-VOLT SUPPLY SHORTED TO VOLTAGE

INTERMITTENT CONDITION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

ECM

Turn the ignition off.

Disconnect the ECM 60 pin harness connector.

NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.

Measure the voltage between the Sensor (F855) #1 5-volt Supply and
the Sensor #1 Return pin at the ECM.

Is the voltage between 4.5 and 5.5 volts?

Yes

>> Go To 2

No

>> Replace and program the ECM in accordance with the

Service Information.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

9 - 1380

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0653-HIGH VOLTAGE AT THE #1 SENSOR SUPPLY CIRCUIT (CONTINUED)

2.

(F855) 5-VOLT SUPPLY SHORTED TO VOLTAGE

Key off.

Disconnect the sensor connectors for each pressure sensor, and the
engine position sensor.

Disconnect the ECM 50 way harness connector.

NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine off.

Measure the voltage between the supply circuit at each pressure sen-
sor harness connector and battery negative.

Measure voltage between the (F853) 5-volt supply circuit at the engine
position sensor harness connector and battery negative.

Is the voltage less than 1 volt?

Yes

>> Go To 3

No

>> Repair the (F855) 5-volt supply shorted to voltage.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

3.

SENSOR SUPPLY SHORTED TO VOLTAGE IN HARNESS

Measure the resistance between the #1 sensor supply circuit and all
other circuit in the ECM connectors.

Is the resistance less than 10 ohms?

Yes

>> Refer to the INTERMITTENT CONDITION Symptom

(Diagnostic Procedure). (Refer to 9 - ENGINE - DIAGNO-
SIS AND TESTING)

No

>> Repair the harness shorted to voltage.

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1381