2006 DODGE RAM SRT-10 air condition

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
theSensor#1ReturnpinattheECM.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Go To 2
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)

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 sensor
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?
Ye s>>
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?
Ye s>>
Refer to the INTERMITTENT CONDITION Symptom (Diag-
nostic Procedure). (Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING)
No>>
Repair the harness shorted to voltage.

For a complete wiring diagramRefer to Section 8W.
When Monitored:
With engine running.
Set Condition:
Low voltage detected at the APPS supply circuit or low voltage detected at the APPS 1 5–volt supply.
Possible Causes
(F855) APPS 5-VOLT SUPPLY OPEN
APPS HIGH RESISTANCE
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K922) RETURN CIRCUIT
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY NEGATIVE
ECM
INTERMITTENT CONDITION
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO OTHER CIRCUITS
APPS
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY NEGATIVE
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the APPS harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the APPS1 (F855) 5-volt supply circuit
between the sensor harness connector and battery negative
Is the resistance greater than 100 k ohms?
Ye s>>
Go To 2
No>>
Repair the (F855) 5-volt supply circuit shorted to battery
negative.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

For a complete wiring diagramRefer to Section 8W.
When Monitored:
Whileengineisrunning.
Set Condition:
High voltage detected at the APPS supply circuit.
Possible Causes
(F855) 5-VOLT SUPPLY OPEN
(F855) 5-VOLT SUPPLY SHORT TO VOLTAGE
ECM
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.(F855) 5-VOLT SUPPLY OPEN
Turn the ignition off.
Disconnect the APPS harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Measure the voltage between the (F855) APPS #1 5-volt supply circuit
at the sensor connector and battery negative.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Replace the APPS.
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 2
2.(F855) 5-VOLT SUPPLY SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the ECM harness connector(s).
NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Measure the voltage between the (F855) APPS #1 5-volt supply circuit
in the sensor harness connector and battery negative.
Is the voltage less than 1 volt?
Ye s>>
Go To 3
No>>
Repair or replace the wiring harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting A/C Clutch operation.
Set Condition:
An overcurrent condition is detected in the A/C Clutch control output circuit. One Trip Fault. Three good trips
to turn off the MIL.
Possible Causes
TERMINAL DAMAGE OR CORROSION
A/C CLUTCH GROUND HIGH RESISTANCE
(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT HIGH RESISTANCE
A/C COMPRESSOR CLUTCH
TIPM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.A/C CLUTCH OPERATION
Ignition on, engine not running.
With a scan tool in the TIPM Actuators, actuate the A/C Clutch.
Is the A/C Clutch actuating?
Ye s>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 2
2.VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION
Turn the ignition off.
Disconnect the TIPM C9 harness connector.
Disconnect the A/C Clutch harness connector.
Inspect the terminal and connector condition. Check for signs of corrosion build up or damage the would compro-
mise the terminal to controller pin connector.
NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.
Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the
wire insulation.
Were any of the above conditions found?
Ye s>>
Repair or replace as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3

When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting Fuel Pump operation.
Set Condition:
An overcurrent condition is detected in the fuel pump control output circuit. One Trip Fault. Three good trips to
turn off the MIL.
Possible Causes
TERMINAL DAMAGE OR CORROSION
FUEL PUMP MOTOR GROUND HIGH RESISTANCE
(A109) FUEL PUMP CONTROL OUTPUT CIRCUIT HIGH RESISTANCE
FUEL PUMP MOTOR
TIPM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.FUEL PUMP OPERATION
Ignition on, engine not running.
With a scan tool in the TIPM Actuators, actuate the Fuel Pump.
Is the Fuel Pump operating?
Ye s>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 2
2.VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION
Turn the ignition off.
Disconnect the C10 TIPM harness connector.
Disconnect the Fuel Pump Module harness connector.
Inspect the terminal and connector condition. Check for signs of corrosion build up or damage the would compro-
mise the terminal to controller pin connector.
NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.
Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the
wire insulation.
Were any of the above conditions found?
Ye s>>
Repair or replace as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3

When Monitored:
While the ignition is on.
Set Condition:
The ECM detects a short to ground on the J1850.
Possible Causes
ECM
(D25) J1850 SHORTED
COMMUNICATION
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 harness connectors.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the (D25) J1850 circuit in the ECM
harness connector and battery negative.
Is the resistance less than 10 Ohms?
Ye s>>
Go To 2
No>>
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

When Monitored:
While the engine is running
Set Condition:
The ECM detected a conformance error between PPS 1 and PPS 2
Possible Causes
OTHER DTC’S
WIRING HARNESS OR CONNECTOR DAMAGED
APPS
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S PRESENT
Using the scan tool, check for any additional APPS fault codes
Do you have any additiona APPS faults?
Ye s>>
troubleshoot other DTC’s first, Go To 2
No>>
Go To 12
2.APPS HARNESS
Verify that the APPS is connected.
Inspect the harness and the APPS connector.
Are any pins damaged?
Ye s>>
Repair or replace the harness.
No>>
Go To 3
3.APPS
Monitor the APPS 1 and APPS 2 voltage with the scan tool while depressing theacceralator pedal.
Is the voltage transition shown on the scan tool smooth while depressing the acceralator pedal and is
the voltage from APPS 1 twice as much as the voltage from APPS 2?
Ye s>>
Go To 4
No>>
Replace the APPS.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)