Diagnostic Test

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

COOLANT CHANGE/ADDING COOLANT
1. NOTE:
  If there are any Coolant Temperature Sensor DTCs present, perform the Diagnostics for those DTCs before continuing with this one.
2. Turn the ignition on.
3. With the scan tool, record all Freeze frame data.
4. With the scan tool, erase DTCs.
5. If Coolant is low or was recently changed, fill the coolant to the proper level.
6. Test drive the vehicle until it reaches normal operating temperature.
7. Shut the engine off and allow it to sit for two hours.
8. Restart the engine and allow it to run for 5 minutes.
9. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Test Complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
LOW BATTERY VOLTAGE AND/OR BATTERY REPLACED
1. If DTC P2509 is also present, it is usually caused by disconnecting the Battery before allowing the normal 10 minute Control Module power down. If DTC P2509 is also present, erase the DTCs and test drive the vehicle. If U3017 returns, continue with this Diagnostic Tree.
2. Verify that the Battery is in good condition. Perform the Battery System Diagnostic Procedure. Refer to DIAGNOSIS AND TESTING .
  Did the Battery test low?
  
  Yes
  - Charge, repair, or replace the Battery as needed. After the repair, turn the ignition on, erase the DTC, and leave the ignition on for five seconds. Then, turn the ignition off for one minute. Then, start the vehicle, allow to idle for five minutes to make sure the DTC does not return.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - The Battery may have been momentarily disconnected before allowing the normal 10 minute Control Module power down. Turn the ignition on, erase the DTC, and leave the ignition on for five seconds. Then, turn the ignition off for one minute. Then, start the vehicle, allow to idle for five minutes to make sure the DTC does not return.
  - If the DTC does return, Go To 3
REPROGRAMMED BCM
Was the BCM recently reprogrammed?

Yes
- Turn the ignition on, erase the DTC, and leave the ignition on for five seconds. Then, turn the ignition off for one minute. Then, start the vehicle, allow to idle for five minutes to make sure the DTC does not return.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 4
COOLANT TEMPERATURE SENSOR
1. Remove the Coolant Temperature Sensor and reconnect the wiring to the sensor.
2. Turn ignition on.
3. Monitor the Scan Tool while heating the sensor with an external heat source (DO NOT USE OPEN FLAME).
  Does the reading from the Coolant Temperature Sensor increase at least 3°C (5°F) on the Scan Tool?
  
  Yes
  - Replace the Body Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Coolant Temperature Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .