Dodge Ram Truck 1500-2500-3500. Manual - part 1718

STANDARD PROCEDURE

PRE-DIAGNOSTIC TROUBLE SHOOTING PROCEDURE - 48RE GAS

For a complete wiring diagramRefer to Section 8W

NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.

NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low locate and
repair the leak then check and adjust the fluid level per the Service Information.
With the scan tool, read engine DTC’s. Check and repair all engine DTCs prior to performing transmission symptom
diagnostics.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.

Verify the flash level of the Powertrain Control Module. Some problems are corrected by software upgrades.

Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

Did any of the above checks or procedures correct the symptom?

Yes

>> Repair is complete.

Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)

>> Refer to the Transmission category and perform the appropriate symptom(s). (Refer to 21 - TRANS-

MISSION/TRANSAXLE/AUTOMATIC - 48RE - DIAGNOSIS AND TESTING)

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

DR/DH

PRE-DIAGNOSTIC TROUBLE SHOOTING PROCEDURE - 48RE GAS (CONTINUED)

TRANSMISSION VERIFICATION TEST VER - 1 (GAS)

1. Inspect the vehicle to ensure that all engine and transmission components are properly installed and connected.
Reassemble and reconnect components as necessary.

2. If any existing diagnostic trouble codes have not been repaired, go to Symptom List and follow path specified.

3. Connect a scan tool to the data link connector.

4. Ensure the fuel tank has at least a quarter tank of fuel. Turn off all accessories.

5. Start and run the engine until the transmission temperature is above 43°C (110°F).

6. Check the transmission fluid level per the Service Information. Adjust if necessary.

7. Road test the vehicle. Make 15 to 20 1-2, 2-3 and 3-4 up shifts. Perform these shifts from a standing start to 72
km/h (45 MPH) with a constant throttle opening of 20-25%.

8. Below 40 km/h (25 MPH), make 5 to 8 wide open throttle kick downs to 1st gear. Allow at least 5 seconds each
in 2nd and 3rd between each kick down.

9. For a specific DTC, drive the vehicle in accordance with the Symptom’s When Monitored and Set Conditions to
verify the repair.

10. If a DTC sets during the road test, return to the Symptom List and follow the path. If no DTC sets, the repair is
complete.

Are there any DTCs or symptoms remaining?

Yes

>> Repair is not complete, refer to appropriate symptom.

>> Repair is complete.

DR/DH

AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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