2006 DODGE RAM SRT-10 sensor

4.(K29) APPS NO. 2 SIGNAL CIRCUIT SHORTED TO OTHER CIRCUITS
Measure the resistance between the (K29) APPS No. 2 signal circuit at
the ECM harness connector and all other circuits in the ECM harness
connectors.
Is the resistance greater than 100 k ohms?
Ye s>>
Go To 5
No>>
Repair the (K29) APPS No. 2 signal circuit shorted to other
circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
5.(F856) APPS NO. 2 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between the (F856) APPS No. 2 5-volt supply
circuit at the sensor harness connector and battery negative.
Is the resistance greater than 100 k ohms?
Ye s>>
Go To 6
No>>
Repair the (F856) APPS No. 2 5-volt supply circuit shorted
to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

6.(F856) APPS NO. 2 5-VOLT SUPPLY CIRCUIT SHORTED TO OTHER CIRCUITS
Measure the resistance between the (F856) APPS No. 2 5-volt supply
circuit at the sensor harness connector and all other circuits in the ECM
harness connector.
Is the resistance greater than 100 k ohms?
Ye s>>
Go To 7
No>>
Repair the (F856) APPS No. 2 5-volt supply circuit shorted
to other circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
7.ECM
Reconnect the ECM harness connectors.
Turn the ignition on.
While monitoring with the scan tool, connect a jumper wire between the (K29) APPS No. 2 signal circuit at the
sensor harness connector and the (F856) APPS No. 2 5-volt supply circuit atthe sensor harness connector.
NOTE: With the sensor disconnected it is normal to have a APPS 1 and APPS 2 lowvoltage DTC set.
Did DTC P2128 set?
Ye s>>
Go To 8
No>>
Replace and program the ECM in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
8.APPS
Reconnect the APPS harness connector.
Monitor the APPS 1 and APPS 2 voltage with the scan tool while depressing thethrottle pedal.
Is the voltage transition shown on the scan tool smooth while depressing thethrottleandisthevolt-
age swing smooth?
Ye s>>
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
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)

When Monitored:
While the key is on and during engine operation.
Set Condition:
The APPS signal circuit voltage at the ECM goes above 4.24 volts for more than 2 seconds.
Possible Causes
(K400) APPS NO. 1 RETURN CIRCUIT OPEN
(K29) APPS NO. 2 SIGNAL CIRCUIT SHORTED TO (K854) APPS NO. 2 5-VOLT SUPPLY
(K29) APPS SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
ECM
APPS
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.(K400) APPS NO. 2 RETURN CIRCUIT OPEN
Turn the ignition off.
Disconnect the APPS harness connector.
Disconnect the ECM harness connectors.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance on the (K400) APPS No. 2 return circuit
between the sensor harness connector and the ECM harness connec-
tor.
Is the resistance less than 10 ohms?
Ye s>>
Go To 2
No>>
Repair the (K400) APPS No. 2 return circuit open.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

2.(K29) APPS NO. 2 SIGNAL CIRCUIT SHORTED TO (F856)APPS NO. 1 5-VOLT SUPPLY
Measure the resistance between the (K29) APPS No. 2 signal circuit in
the sensor harness connector andthe (F856)APPS No. 2 5-volt supply
circuit in the sensor harness connector.
Is the resistance greater than 100 K ohms?
Ye s>>
Go To 3
No>>
Repair the (K29) APPS No. 2 signal circuit shorted to the
(F856)5-volt supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
3.(K29) APPS SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
Measure the resistance between the APPS No. 2 signal circuit at the
ECM harness connector and all other circuits in the ECM harness con-
nector.
Is the resistance greater than 100 k ohms?
Ye s>>
Go To 4
No>>
Repair the (K29) APPS No. 2 signal circuit shorted to
another circuit in 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)

4.ECM
Reconnect the ECM harness connectors.
Reconnect the APPS harness connector.
While monitoring with the scan tool, disconnect the sensor connector.
Did a APPS No. 1 and APPS No. 2 voltage too low DTC set?
Ye s>>
Go To 5
No>>
Replace and program the ECM in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
5.APPS
Reconnect the APPS harness connector.
Monitor the APPS No. 1 and APPS No. 2 voltage with the scan tool while depressing the throttle pedal.
Is the voltage transition shown on the scan tool smooth while depressing thethrottleandisthevolt-
age from APPS 1 twice as much as from APPS2
Ye s>>
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
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)

P2266-WATER IN FUEL (WIF) SENSOR VOLTAGE TOO LOW
For a complete wiring diagramRefer to Section 8W.

When Monitored:
Ignition on.
Set Condition:
Low voltage detected at the WIF signal circuit at the ECM.
Possible Causes
WATER IN FUEL SENSOR
ECM
(G123) WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO (K914) RETURN CIRCUIT
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.WATER IN FUEL SENSOR
Turn the ignition off.
Disconnect the Water in fuel sensor harness connector.
Ignition on, engine not running.
NOTE: Check connectors - Clean/repair as necessary.
Measure the voltage between the signal circuit and return circuit of the
WIF sensor harness connector.
Is the voltage between 4.5 and 5.5 volts?
Ye s>>
Replace the Water in fuel 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 2
2.SIGNAL CIRCUIT SHORTED TO RETURN CIRCUIT
Disconnect the ECM connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the signal circuit of the sensor connec-
tor and the return circuit of the sensor connector.
Is the resistance less than 10 ohms?
Ye s>>
Repair or replace the 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 3

3.ECM
Reconnect the ECM connector.
Measure the resistance between the signal circuit of the sensor connectorand the return circuit of the sensor con-
nector.
Is the resistance less than 10 ohms?
Ye s>>
Replace the ECM.
No>>
Te s t C o m p l e t e .