2006 DODGE RAM SRT-10 relay

5.HEATER CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the O2 Heater Control
(PWM) circuit.
Istheresistancebelow100ohms?
Ye s>>
Repair the short to ground in the Heater Control (PWM) cir-
cuit or the Heater Relay Control circuit depending on the O2
Sensor being tested.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
No>>
Go To 6
6.PCM
NOTE: Before continuing, check the PCM 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.
If there are no possible causes remaining, view repair.
Repair
Replace and program the Powertrain Control Module per Service Information.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

When Monitored:
Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is on.
Set Condition:
Desired state does not match Actual state.
Possible Causes
O2 HEATER TEST
O2 SENSOR HEATER ELEMENT
(K343) FUSED ASD RELAY OUTPUT CIRCUIT
(K199) HEATER CONTROL CIRCUIT OPEN
(K199) HEATER CONTROL CIRCUIT SHORTED TO GROUND
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.O2 HEATER TEST
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
With the scan tool, actuate the O2 Heater test.
Monitor the O2 Heater Voltage for 5 minutes.
Did the voltage drop down close to zero during the Heater test?
Ye s>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 2
NOTE: Stop the actuation before continuing.
2.O2 HEATER ELEMENT
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Measure the resistance of the O2 Heater element at the O2 Sensor
connector (component side).
On a four O2 Sensor system the resistance value for 1/1 and 2/1 O2
Heater elements is between 3.3 and 4.1 ohms and the 1/2 and 2/2 O2
Heater elements is between 4.0 and 5.0 ohms at 70° F(21.1°C).
NOTE: The resistance value will increase with warmer tempera-
tures.
Is the resistance within the listed specifications?
Ye s>>
Go To 3
No>>
Replace the O2 Sensor.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)

3.(K343) FUSED ASD RELAY OUTPUT CIRCUIT OPEN
Ignition on, engine not running.
With the scan tool, actuate the O2 Heater Test.
Using a 12-volt test light connected to ground, probe the (K343) Fused
ASD Relay Output circuit at the O2 Sensor harness connector.
Did the test light illuminate brightly?
Ye s>>
Go To 4
NOTE: Stop the actuation before continuing.
No>>
Repair the open or short to ground in the (K343) Fused
ASD Relay Output circuit. Inspect the related fuse and
repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
4.(K199) HEATER CONTROL CIRCUIT OPEN
Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance of the (K199) O2 Heater Control circuit from the
O2 Sensor to the PCM harness connector.
Is the resistance below 5.0 ohms?
Ye s>>
Go To 5
No>>
Repair the open in the (K199) O2 Heater Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)

5.(K199) HEATER CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K199) O2 Heater
Control (PWM) circuit.
Istheresistancebelow100ohms?
Ye s>>
Repair the short to ground in the (K199) Heater Control
(PWM) circuit or the Heater Relay Control circuit depending
on the O2 Sensor being tested.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 6
6.PCM
NOTE: Before continuing, check the PCM 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.
If there are no possible causes remaining, view repair.
Repair
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

When Monitored:
Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is on.
Set Condition:
Desired state does not match Actual state.
Possible Causes
O2 HEATER TEST
O2 SENSOR HEATER ELEMENT
(K343) FUSED ASD RELAY OUTPUT CIRCUIT
(K199) HEATER CONTROL CIRCUIT OPEN
(K199) HEATER CONTROL CIRCUIT SHORTED TO GROUND
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.O2 HEATER TEST
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
With the scan tool, actuate the O2 Heater test.
Monitor the O2 Heater Voltage for 5 minutes.
Did the voltage drop down close to zero during the Heater test?
Ye s>>
Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 2
NOTE: Stop the actuation before continuing.
2.O2 HEATER ELEMENT
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Measure the resistance of the O2 Heater element at the O2 Sensor
connector (component side).
On a four O2 Sensor system the resistance value for 1/1 and 2/1 O2
Heater elements is between 3.3 and 4.1 ohms and the 1/2 and 2/2 O2
Heater elements is between 4.0 and 5.0 ohms at 70° F(21.1°C).
NOTE: The resistance value will increase with warmer tempera-
tures.
Is the resistance within the listed specifications?
Ye s>>
Go To 3
No>>
Replace the O2 Sensor.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)

3.(K343) FUSED ASD RELAY OUTPUT CIRCUIT OPEN
Ignition on, engine not running.
With the scan tool, actuate the O2 Heater Test.
Using a 12-volt test light connected to ground, probe the (K343) Fused
ASD Relay Output circuit at the O2 Sensor harness connector.
Did the test light illuminate brightly?
Ye s>>
Go To 4
No>>
Repair the open or short to ground in the (K343) Fused
ASD Relay Output circuit. Inspect the related fuse and
repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
NOTE: Stop the actuation before continuing.
4.HEATER CONTROL CIRCUIT OPEN
Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance of the (K199) O2 Heater Control circuit from the
O2 Sensor to the PCM harness connector.
Is the resistance below 5.0 ohms?
Ye s>>
Go To 5
No>>
Repair the open in the (K199) O2 Heater Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)

5.(K199) HEATER CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K199) O2 Heater
Control (PWM) circuit.
Istheresistancebelow100ohms?
Ye s>>
Repair the short to ground in the (K199) Heater Control
(PWM) circuit or the Heater Relay Control circuit depending
on the O2 Sensor being tested.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 6
6.PCM
NOTE: Before continuing, check the PCM 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.
If there are no possible causes remaining, view repair.
Repair
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

When Monitored:
With battery voltage greater than 10.4 volts, engine running for more than4 minutes and coolant temperature
above 180°F.
Set Condition:
The oxygen sensor voltage is above 1.5 volts.
Possible Causes
(K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K99) O2 SENSOR 1/1 HEATER CONTROL CIRCUIT OPEN
(K41) O2 1/1 SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND CIRCUIT OPEN
(K343) ASD RELAY OUTPUT CIRCUIT OPEN
(K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO THE (K343) ASD RELAY OUTPUT CIRCUIT
O2 SENSOR
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.O2 SENSOR ABOVE 1.5 VOLTS
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
Start the engine.
Allow the engine to idle for 4 to 5 minutes.
With the scan tool, read the O2 Sensor voltage.
Is the voltage above 1.5 volts?
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.(K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the C1 PCM harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the (K41) O2 Sen-
sor 1/1 Signal circuit at the 1/1 O2 Sensor harness connector.
Does the test light illuminate brightly?
Ye s>>
Repair the short to voltage in the (K41) O2 Sensor 1/1 Sig-
nal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3