DODGE RAM SRT-10 2006 Service Owner's Guide

P1115-GENERAL TEMPERATURE RATIONALITY
For a complete wiring diagramRefer to Section 8W.

Theory of Operation
The General Temperature Rationality looks at the outputs of the three temperature sensors and compare them
under cold start conditions. Following a start to run delay time, the outputs of the ambient, engine coolant, and
intake air temperature sensors will be compared. If two sensors agree but not the third, the third sensor is declared
as irrational. If all three sensors are irrational the General Temperature Sensor Rationality is failed.
When Monitored:
Ignition on and battery voltage greater than 10 volts.
Set Condition:
Ambient Air, Engine Coolant, and Intake Air Temp sensor inputs are compared under cold start conditions.
After start up the temp readings are monitored. If two of the three readingsagree and the third doesn’t, a DTC
is stored. Two Trip Fault. Three good trips to turn off the MIL.
Possible Causes
EXCESSIVE RESISTANCE IN THE SENSOR SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
EXCESSIVE RESISTANCE IN THE (G930) AAT RETURN CIRCUIT
TEMPERATURE SENSOR
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read the DTCs.
NOTE: All ECT, Intake Air, and Ambient Air Temperature Sensor codes must bediagnosed and repaired
before continuing.
NOTE: In cold weather, this DTC could be set by a high powered block heater andnorepairwouldbe
required.
Is the DTC active at this time?
Ye s>>
Go To 2
No>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.TEMPERATURE SENSOR CIRCUIT
With a scan tool, read the ECT, Ambient Air Temp, and Intake Air Temp Sensor temp values.
Start the engine.
Allow the engine to reach normal operating temperature while monitoring the three Sensor temperature values.
Is the temperature for each of the Sensors increasing properly?
Ye s>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3

3.TEMPERATURE SENSOR
Ignition on, engine not running.
Disconnect the suspected sensor.
Connect a jumper wire between the Sensor Signal circuit and the
(K900) Sensor ground or (G930) AAT Reuturn circuit.
With the scan tool, read the voltage of the suspected Sensor.
Did the voltage reading start at 4.8 to 5.0 volts and decrease to
0 volts when the jumper wire was installed?
Ye s>>
Replace the Sensor.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 4
NOTE: Remove the jumper wire before continuing.

4.EXCESSIVE RESISTANCE IN THE TEMPERATURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the PCM harness connectors.
CAUTION: Do not probe the PCM harness connectors. Probing the
PCM harness connectors will damage the PCM terminals resulting
in poor terminal to pin connection. Install Miller Special Tool #8815
to perform diagnosis.
Measure the resistance of the Sensor Signal circuit from the Sensor
harness connector to the appropriate terminal of special tool #8815.
Measure the resistance of the (G31) AAT Sensor Signal circuit from the
AAT Sensor harness connector to the C5 TIPM harness connector.
Is the resistance above 5.0 ohms.
Ye s>>
Repair the excessive resistance in the Temperature Sensor
Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 5

5.EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
Measure the resistance of the (K900) Sensor ground circuit from the
Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance above 5.0 ohms.
Ye s>>
Repair the excessive resistance in the (K900) Sensor
ground circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 6

6.(G930) SENSOR GROUND CIRCUIT OPEN
Measure the resistance of the (G930) AAT return circuit from the AAT
Sensor harness connector to the C5 TIPM harness connector.
Is the resistance below 5.0 ohms?
Ye s>>
Go To 7
No>>
Repair the open in the (G930) AAT return circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
7.PCM
NOTE: Before continuing, check the PCM harness connector termi-
nals for corrosion, damage, or terminal push out. Repair as neces-
sary.
Using the schematics as a guide, inspect the wire harness and connec-
tors. Pay particular attention to all Power and Ground circuits.
Were there any problems found?
Ye s>>
Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Replace and program the Powertrain Control Module per
Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)

P126B-ASD CONTROL CIRCUIT 2 LOW
For a complete wiring diagramRefer to Section 8W.

When Monitored:
With the ignition on. Battery voltage greater than 10 volts.
Set Condition:
A shorted condition is detected in the ASD control circuit. One Trip Fault.Three good trips to turn off the MIL.
Possible Causes
(K342) ASD CONTROL OUTPUT CIRCUIT SHORTED TO GROUND
FUEL INJECTOR
IGNITION COIL
PCM
TIPM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.ASD OPERATION
Ignition on, engine not running.
With a scan tool under the ECM Actuators, actuate the ASD Circuit.
Are the Injectors 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.ASD OPERATION FROM THE ECM
Turn the ignition off.
Disconnect the C2 TIPM harness connector.
Ignition on, engine not running.
Using the scan tool under the ECM Actuators, actuate the ASD Circuit.
With a 12-volt test light connected to ground, probe the (K51) ASD Con-
trol circuit in the TIPM C2 harness connector.
Does the test light illuminate brightly and flash on an off?
Ye s>>
Go To 3
No>>
Perform the Diagnostic Procedure for P0685-ASD CON-
TROL CIRCUIT. (Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING)

3.(K342) ASD CONTROL OUTPUT CIRCUIT SHORTED TO GROUND
Turn the ignition off
Disconnect the C10 TIPM harness connector.
Measure resistance between ground and (K342) ASD Control Output
circuit at the C10 TIPM harness connector.
Istheresistancebelow100ohms?
Ye s>>
Go To 4
No>>
Go To 7
4.(K342) ASD CONTROL OUTPUT CIRCUIT SHORTED TO GROUND AT THE FUEL INJECTORS
While checking for a short to ground at C10 TIPM harness connector,
disconnect the Fuel Injector harness connectors one at a time.
Does the resistance change to above 100 ohms when any of
the Fuel Injector harness connectors are disconnected?
Ye s>>
Replace the Fuel Injector that causes the resistance to
increase above 100 ohms when disconnected.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 5
5.(K342) ASD CONTROL OUTPUT CIRCUIT SHORTED TO GROUND AT THE IGNITION COILS
While checking for a short to ground at C10 TIPM harness connector,
disconnect the Ignition Coil harness connectors one at a time.
Does the resistance change to above 100 ohms when any of
the Ignition Coil harness connectors are disconnected?
Ye s>>
Replace the Coil that causes the resistance to increase
above 100 ohms when disconnected.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 6

6.PCM
Disconnect C3 NGC harness connector.
Measure resistance between ground and (K342) ASD Control Output
circuit at the C10 TIPM harness connector.
Does the resistance change to above 100 ohms when the C3
NGC harness connector is disconnected?
Ye s>>
Replace and program the Powertrain Control Module in
accordance with Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Repair the short to ground in the (K342) ASD Control Out-
put circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
7.TOTALLY INTEGRATED POWER MODULE
NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to all Power and Ground circuits.
Were any problems found?
Ye s>>
Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Replace the Totally Integrated Power Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)