Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
- VERIFY THE DTC IS ACTIVE NOTE:
Make sure the battery voltage is between 10 and 16 volts before proceeding.
- With the scan tool, read active DTCs.
Is this DTC active?
Yes
- Go To 2
No
- Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCs diagnostic procedure.
- With the scan tool, read active DTCs.
- CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
- With the scan tool, read all active DTCs from all modules.
Does the scan tool display any active DTCs to the conditions listed above?
Yes
- Perform the appropriate diagnostic procedure. Refer to the DTC INDEX - 1500 article.
No
- Go To 3
- With the scan tool, read all active DTCs from all modules.
- VERIFY THE ESM IS ACTIVE ON THE BUS
- Turn the ignition ON.
- With the scan tool, select Network Diagnostics.
- Verify the ESM is active on the BUS.
Is the ESM active on the BUS?
Yes
- Go To 4
No
- Refer to DIAGNOSIS AND TESTING and perform the NO RESPONSE FROM ESM (ELECTRONIC SHIFT MODULE) diagnostic procedure.
- CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
- With the scan tool, read all the DTCs.
Is there more than one module with active DTCs "Logged Against" the ESM ?
Yes
- Replace and program the ESM in accordance with the Service Information. Refer to SHIFTER, TRANSMISSION, REMOVAL .
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
No
- Go To 5
- With the scan tool, read all the DTCs.
- CLEAR DTC IN MODULE SETTING FAULT
- With the scan tool, select the module setting the DTC against the ESM.
- Clear active DTCs.
Is the DTC still active?
Yes
- Replace and program the module that set this DTC in accordance with the Service Information.
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
No
- Go To 6
- CYCLE IGNITION
- Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
Does the DTC become active?
Yes
- Go To 7
No
- The condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched and partially broken wires and the wiring harness connectors for broken, bent, pushed out and corroded terminals.
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
- Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
- CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS
- With the scan tool, select Network Diagnostics.
Does the ABS and other CAN C BUS modules show Lost Communication with the remaining CAN C BUS modules?
Yes
- Go To 8
No
- Replace and program the module that set this DTC in accordance with the Service Information.
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
- With the scan tool, select Network Diagnostics.
- CHECK THE CAN C BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE
- Measure the voltage between the CAN C BUS (+) circuit and ground.
Is the voltage above 5.0 volts?
Yes
- Repair the short to voltage in the CAN C BUS (+) circuit.
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
No
- Go To 9
- Measure the voltage between the CAN C BUS (+) circuit and ground.
- CHECK THE CAN C BUS (-) CIRCUIT FOR A SHORT TO GROUND
- Turn the ignition OFF.
- Measure the resistance between ground and the CAN C BUS (-) circuit.
Is the resistance below 10K Ohms?
Yes
- Repair the short to ground in the CAN C BUS (-) circuit.
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
No
- Using the schematics as a guide, check the ESM terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shift Lever Assembly in accordance to the Service Information. Refer to SHIFTER, TRANSMISSION, REMOVAL .
- Perform the ESM VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .