RAM 2500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1999)
feature.
12.
From the Custom Display # 1 Menu, select View (# 1) to display the list of Custom Display values that have been created.
13.
Make certain that the engine and transmission are at normal operating temperatures.
14.
With the ignition switch in the "ON" position and engine stopped, press the O/D (overdrive) disable button on the shifter handle. This will prevent
4th gear from being able to be engaged.
15.
Verify that the O/D Off Lamp display reads "ON / 3-Speed".
16.
Observe the APP Pedal Position Volts and record the value (volts) when the throttle is closed.
NOTE:
TO PERFORM THE DIAGNOSTIC TEST CORRECTLY, THE TECHNICIAN MUST ACCELERATE THE VEHICLE WHILE MAINTAINING
A SPECIFIC THROTTLE POSITION VOLTAGE (CALLED THE DIAGNOSTIC TEST RANGE VOLTAGE). THE TECHNICIAN MUST
PERFORM TWO CALCULATIONS TO OBTAIN THE CORRECT VOLTAGE RANGE TO PERFORM THE DIAGNOSTIC TEST.
WITH THE THROTTLE CLOSED, OBTAIN THE "APP PEDAL POSITION VOLTS" READING. THE "APP PEDAL POSITION VOLTS"
MUST BE ADDED TO A MINIMUM INITIAL TEST RANGE VOLTAGE AND A MAXIMUM INITIAL TEST VOLTAGE. THE MINIMUM
INITIAL TEST RANGE VOLTAGE IS 0.6 VOLTS AND THE MAXIMUM INITIAL TEST RANGE VOLTAGE IS 0.9 VOLTS. ADD THE
CLOSED THROTTLE "APP PEDAL POSITION VOLTS" TO EACH OF THE INITIAL TEST RANGE VOLTAGES TO OBTAIN THE
DIAGNOSTIC TEST RANGE VOLTAGE.
For example:
If the APP Pedal Position Volts at closed throttle is 0.5 volts, then add 0.5 volts to the initial minimum and maximum test range voltages (0.6 volts and
0.9 volts) to obtain the diagnostic test range voltages (1.1 volts to 1.4 volts). The technician would accelerate the vehicle, in this example, while
maintaining an APP Pedal Position Voltage of between 1.1 volts and 1.4 volts.
17.
Add the APP Pedal Position Volts, at closed throttle, to the minimum and maximum initial test range voltages to obtain the diagnostic test range
voltages.
18.
Start the engine. Press the O/D off button to turn off overdrive (prevent 4th gear).
NOTE:
THE VEHICLE SHOULD BE DRIVEN IN A SAFE AREA AND IN A SAFE MANNER WHILE PERFORMING THE FOLLOWING
DIAGNOSTIC TEST. OBSERVE ALL SPEED LIMITS.
19.
Accelerate the vehicle while maintaining the APP Pedal Position Voltage within the diagnostic test range voltage (as calculated in step 17).
20.
Verify that the Brake Switch is "Released", and the Park/Neutral reads "D/R".
21.
Verify that the torque converter clutch command is being given. The Desired TC Clutch must read "LOCKED" within a few seconds after
reaching 3rd gear.
22.
Bring the vehicle to a stop. Accelerate the vehicle while maintaining the diagnostic test range voltage.
22.
Continue the vehicle acceleration through the 1 - 2 shift and into the 2 - 3 shift. Again, make certain that the O/D Off Lamp reads "ON /
3-SPEED".
23.
Monitor the Desired TC Clutch, the PCM Engine RPM, and the Output Shaft Speed values/reading as the transmission shifts from 2nd to 3rd.
24.
When the "LOCKED" command is given by the PCM to the torque converter clutch (the Desired TC Clutch value reads "LOCKED"), the PCM
Engine RPM and the Output Shaft Speed should be within ± 30 rpm of each other within 5 seconds.
25.
It may take a 3 or 4 accelerations to obtain a diagnostic conclusion.
26.
If after 5 seconds following the TCC lockup command, the rpm difference between the PCM Engine RPM and the Output Shaft Speed is greater
then ± 30 rpm, then proceed with the Repair Procedure.
PARTS REQUIRED:
1
52118048AD
Plate, Valve Body Upper Housing Separator
1
02464324AB
Gasket, Transmission Oil Pan
10
05010124AA
ATF +3, Transmission Oil (Type 7176E)
EQUIPMENT REQUIRED:
