2006 DODGE RAM SRT-10 air condition

NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should
not move.
Were any of the above conditions present?
Ye s>>
Replace the Spark Plug.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 6
6.FUEL PRESSURE CHECK
WARNING: The fuel system is under a constant pressure (even with the engineoff). Before testing or ser-
vicing any fuel system hose, fitting or line, the fuel system pressure mustbe released. Failure to follow
these instructions can result in personal injury or death.
Install a fuel pressure gauge to the fuel rail.
Start the engine and observe the fuel pressure reading.
NOTE: Fuel pressure specification is 407 KPa +/- 34 KPa (59 psi +/- 5 psi).
Choose a conclusion that best matches your fuel pressure reading.
Within Specification
Go To 7
Below Specification
Go To 12
Above Specification
Replace the fuel filter/pressure regulator.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
7.FUEL PRESSURE LEAK DOWN
NOTE: Before continuing visually and physically inspect the fuel delivery system for external leaks or dam-
age. Repair / replace as necessary.
Turn the ignition off.
WARNING: The fuel system is under a constant pressure (even with the engineoff). Before testing or ser-
vicing any fuel system hose, fitting or line, the fuel system pressure mustbe released. Failure to follow
these instructions can result in personal injury or death
Install special tool #6539 (5/16
) or #6631 (3/8) fuel line adapter.
Install the fuel pressure gauge.
Start the engine and allow the fuel system to reach maximum pressure.
Turn the ignition off.
NOTE: Fuel specification is 407 KPa +/- 34 KPa (59 psi +/- 5 psi).
Using special tool #C4390, Hose Clamp Pliers, pinch the rubber fuel line between the fuel pressure gauge and the
engine.
Monitor the fuel pressure gauge for a minimum of 5 minutes.
NOTE: The pressure should not fall below 241 KPa (35 psi).
Does the pressure fall below the listed specification?
Ye s>>
Replace the leaking Fuel Injector(s).
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 8

8.FUEL INJECTOR OPERATION
WARNING: The fuel system is under a constant pressure (even with the engineoff). Before testing or ser-
vicing any fuel system hose, fitting or line, the fuel system pressure mustbe released. Failure to follow
these instructions can result in personal injury or death.
CAUTION: After each Fuel Injector actuation, start the engine to clean thecylinder of fuel. Failure to do so
could cause engine damage.
Remove special tool #C4390.
Start the engine and allow the fuel pressure to reach maximum pressure.
Ignition on, engine not running.
Using the scan tool, actuate the Fuel Injector.
Monitor the fuel pressure gauge.
Does the fuel pressure gauge indicate a drop in fuel pressure?
Ye s>>
Go To 9
No>>
Go To 10
NOTE: Turn the ignition off, remove the Fuel Pressure gauge, and connect the fuel lines before continuing.
9.ENGINE MECHANICAL
Check for any of the following conditions/mechanical problems.
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
CAM LOBES - must not be worn excessively
CYLINDER LEAKAGE TEST - must be within specifications
VALVE SPRINGS - cannot be weak or broken
Are there any engine mechanical problems?
Ye s>>
Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 17

When Monitored:
Engine running.
Set Condition:
The Knock Sensor circuit voltage falls below a minimum value at idle or deceleration. The minimum value is
from a look-up table internal to the PCM and is based on engine RPM. DTC will also set if the sensor voltage
goes above 5.0 volts. One Trip Fault. Three good trips to turn off the MIL.
Possible Causes
(K42) KNOCK SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K42) KNOCK SENSOR NO.1 SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND CIRCUIT OPEN
(K42) KNOCK SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUNDCIRCUIT
(K42) KNOCK SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND
KNOCK 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 DTCs.
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.(K42) KNOCK SENSOR NO.1 SIGNAL SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the Knock Sensor harness connector.
Disconnect the PCM harness connector.
Ignition on, engine not running.
Measure the voltage on the (K42) Knock Sensor No.1 Signal circuit in
the Knock Sensor harness connector.
Is the voltage above 2.0 volts?
Ye s>>
Repair the short to battery voltage in the (K42) Knock Sen-
sor No.1 Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3

When Monitored:
Engine running
Set Condition:
The Knock Sensor circuit voltage falls below a minimum value at idle or deceleration. The minimum value is
from a look-up table internal to the PCM and is based on engine RPM. DTC well also set if the sensor voltage
goes above 5.0 volts. One Trip Fault. Three good trips to turn off the MIL. One Trip Fault. Three good trips to
turn off the MIL.
Possible Causes
(K242) KNOCK SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K242) KNOCK SENSOR NO.2 SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND CIRCUIT OPEN
(K242) KNOCK SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
(K242) KNOCK SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO GROUND
KNOCK 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 DTCs.
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.(K242) KNOCK SENSOR NO.2 SIGNAL SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the No.2 Knock Sensor harness connector.
Disconnect the C3 PCM harness connector.
Ignition on, engine not running.
Measure the voltage on the (K242) Knock Sensor No.2 Signal circuit in
the Knock Sensor harness connector.
Is the voltage above 2.0 volts?
Ye s>>
Repair the short to battery voltage in the (K242) Knock Sen-
sor No.2 Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No>>
Go To 3

When Monitored:
With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running,
engine rpm less than 2016, and none of the coils in dwell when checked.
Set Condition:
Peak current is not achieved with battery based dwell plus 1.5 ms of diagnostic offset. It takes less than 3
seconds during cranking or up to 6 seconds while running to set.
Possible Causes
(K343) ASD RELAY OUTPUT CIRCUIT
IGNITION COIL
(K17) IGNITION COIL NO.2 CONTROL CIRCUIT OPEN
(K17) IGNITION COIL NO.2 CONTROL CIRCUIT SHORTED TO GROUND
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.GOOD TRIP EQUAL TO ZERO
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Ye s>>
Go To 2
No>>
Refer to the INTERMITTENT CONDTION Diagnostic Procedure.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.(K343) ASD RELAY OUTPUT CIRCUIT
Turn the ignition off.
Disconnect the Ignition coil harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the (K343) ASD
Relay Output circuit at the coil harness connector.
With the scan tool, actuate the ASD Relay.
Does the test light illuminate brightly?
Ye s>>
Go To 3
No>>
Inspect the related fuse. Repair the excessive resistance or
short to ground in the (K343) ASD Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
CAUTION: Stop All Actuations.

3.IGNITION COIL RESISTANCE
Turn the ignition off.
The resistance of a 8.3L Primary Ignition coil is 0.53 to 0.65 of an ohm.
Measure the resistance of the primary Ignition coil.
Is the resistance within the appropriate specification?
Ye s>>
Go To 4
No>>
Replace the Ignition coil.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
4.IGNITION COIL
Using a 12-volt test light connected to a 12-volt source, probe the (K17)
Ignition Coil No.2 Control circuit.
Crank the engine for 5 seconds while observing the test light.
What is the condition of the test light while cranking the
engine?
Brightly blinking.
Replace the Ignition Coil.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
ON constantly.
Go To 5
OFF constantly.
Go To 6
5.(K17) IGNITION COIL NO.2 CONTROL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the C1 PCM harness connector.
Measure the resistance between the (K17) Ignition Coil No.2 Control cir-
cuit and ground.
Istheresistancebelow100ohms?
Ye s>>
Repair the short to ground in the (K17) Ignition Coil No.2
Control circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
No>>
Go To 7

When Monitored:
With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running,
engine rpm less than 2016, and none of the coils in dwell when checked.
Set Condition:
Peak current is not achieved with battery based dwell plus 1.5 ms of diagnostic offset. It takes less than 3
seconds during cranking or up to 6 seconds while running to set.
Possible Causes
(K343) ASD RELAY OUTPUT CIRCUIT
IGNITION COIL
(K18) IGNITION COIL CONTROL NO.3 CIRCUIT OPEN
(K18) IGNITION COIL CONTROL NO.3 CIRCUIT SHORTED TO GROUND
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.GOOD TRIP EQUAL TO ZERO
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Ye s>>
Go To 2
No>>
Refer to the INTERMITTENT CONDTION Diagnostic Procedure.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.(K343) ASD RELAY OUTPUT CIRCUIT
Turn the ignition off.
Disconnect the Ignition coil harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the (K343) ASD
Relay Output circuit at the coil harness connector.
With the scan tool, actuate the ASD Relay.
Does the test light illuminate brightly?
Ye s>>
Go To 3
No>>
Inspect the related fuse. Repair the excessive resistance or
short to ground in the (K343) ASD Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
CAUTION: Stop All Actuations

3.IGNITION COIL RESISTANCE
Turn the ignition off.
The resistance of a 8.3L Primary Ignition coil is 0.53 to 0.65 of an ohm.
Measure the resistance of the primary Ignition coil.
Is the resistance within the appropriate specification?
Ye s>>
Go To 4
No>>
Replace the Ignition coil.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
4.IGNITION COIL
Using a 12-volt test light connected to a 12-volt source, probe the Igni-
tion (K18) Igniton Coil No.3 Control circuit.
Crank the engine for 5 seconds while observing the test light.
What is the condition of the test light while cranking the
engine?
Brightly blinking.
Replace the Ignition Coil.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
ON constantly.
Go To 5
OFF constantly.
Go To 6
5.(K18) COIL CONTROL NO.3 CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the C1 PCM harness connector.
Measure the resistance between the (K18) Ignition Coil Control No.3 cir-
cuit and ground.
Istheresistancebelow100ohms?
Ye s>>
Repair the short to ground in the (K18) Ignition Coil Control
No.3 circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 -
ENGINE - STANDARD PROCEDURE)
No>>
Go To 7