Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read DTCs and record on the repair order.
2. Record the Freeze Frame Data and Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Freeze Frame and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any Misfire DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DTC INDEX - 2500 HD .
  No
  - Go To 3
CHECK THE (K454) MDS SOLENOID No. 7 CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Disconnect the C140 in-line harness connector. The connector is located behind the left side of the cylinder head.
4. Turn the ignition on.
5. Measure the voltage on (K454) MDS Solenoid No. 7 Control circuit at the PCM side of the C140 in-line harness connector.
  Is voltage present?
  
  Yes
  - Repair the short to voltage in the (K454) MDS Solenoid No. 7 Control circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4

CHECK THE MDS SOLENOID FOR PROPER RESISTANCE

Turn the ignition off.
Measure the resistance between the (Z904) Ground circuit and the (K454) MDS Solenoid No. 7 Control circuit at the MDS side of the C140 in-line harness connector.

Compare the resistance measurement with the MDS SOLENOID TEMPERATURE VS RESISTANCE TABLE.

MDS SOLENOID TEMPERATURE VS RESISTANCE TABLE
TEMPERATURE VALUE	RESISTANCE - MINIMUM	RESISTANCE - MAXIMUM
-18° C (0° F)	7.22 ?	8.12 ?
0° C (32° F)	7.92 ?	8.82 ?
20° C (68° F)	8.72 ?	9.62 ?
38° C (100° F)	9.42 ?	10.32 ?
66° C (150° F)	10.62 ?	11.52 ?
93° C (200° F)	11.82 ?	12.72 ?
121° C (250° F)	12.82 ?	13.72 ?
149° C (300° F)	14.02 ?	14.92 ?

Is the resistance within an acceptable range?

Yes

Go To 5

Visually inspect the wiring harness between the C140 in-line harness connector and the MDS Solenoid connector and repair as necessary. If the wiring harness is OK, replace the MDS Solenoid in accordance with the Service Information. Refer to SOLENOID, MULTIPLE DISPLACEMENT, REMOVAL .
Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

CHECK THE POWERTRAIN CONTROL MODULE (PCM) CONTROL DRIVER FOR PROPER OPERATION
NOTE:
The DTC must not be active for the actuator test to operate properly, erase all DTC before continuing.
1. With the scan tool, erase DTCs.
2. Turn the ignition off.
3. Reconnect the PCM C2 harness connector.
4. Ignition on, engine not running.
5. Using a 12-volt test light connected to the Ground circuit, probe the (K454) MDS Solenoid No. 7 Control circuit in the C140 harness connector.
6. With a scan tool, actuate the MDS Solenoid.
  Does the 12-volt test light flash on and off?
  
  Yes
  - Go To 6
  No
  - Go To 8
CHECK THE MDS SOLENOID 7 FOR PROPER OPERATION
1. Turn the ignition off.
2. Remove the Intake Manifold in accordance with the service information. Refer to MANIFOLD, INTAKE, REMOVAL .
3. Turn the ignition on.
4. With the scan tool actuate the MDS Solenoid 7.
  Can you feel and hear the Solenoid Actuating?
  
  Yes
  - Go To 7
  No
  - Replace the MDS Solenoid 7 in accordance with the Service Information. Refer to SOLENOID, MULTIPLE DISPLACEMENT, REMOVAL . Check the oil passages for debris that may be blocking the oil passages (3) to the Solenoid before installing the new one.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE OIL PASSAGES FOR RESTRICTIONS
1. Turn the ignition off.
2. Remove both Solenoids (1 and 7) on Bank 1 of the engine block.
3. Remove the Bank 1 Cylinder Head in accordance with the service information. Refer to CYLINDER HEAD, REMOVAL .
4. Remove the Lifters from the left engine bank.
5. Inspect the oil passages to the Solenoids and from the Solenoids to the lifters.
  Are the passages blocked?
  
  Yes
  - Clean the oil passages as necessary. If the entire engine is restricted disassembly of the entire engine block may be necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace both sets of lifters if no other possible causes remain. Refer to LIFTER(S), HYDRAULIC, ROLLER, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .