
TEST ACTION APPLICABILITY
2 With the DRBIIIt, read Transmission DTC's.
Are any of the following DTCs P1716, P0731, P0732, P0733, P0734, P1736 present
also?All
Ye s®If any of these codes are present, disregard the P1793 DTC and
refer to the symptom list for the other DTC'(s).
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
3 With the DRBIIIt, Check the STARTS SINCE SET counter.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET equal to 0?All
Ye s®Go To 4
No®Go To 9
4 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Torque Management Request Sense circuit from the
TCM harness connector to the PCM harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Torque Management Request Sense circuit for an
open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Torque Management Request Sense
circuit.
Is the resistance below 5.0 ohms?All
Ye s®Repair Torque Management Request Sense circuit for a short to
ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Ignition on, engine not running.
Measure the voltage of the Torque Management Request Sense circuit in the TCM
harness connector.
Is the voltage above 10.5 volts?All
Ye s®Repair Torque Management Request Sense circuit short to volt-
age.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 7
131
TRANSMISSION
P1793-TRD LINK COMMUNICATION ERROR ÐContinued

TEST ACTION APPLICABILITY
7 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Ignition on, engine not running.
Measure the voltage of the Torque Management Request Sense circuit in the TCM
harness connector.
Is the voltage above 7.0 volts?All
Ye s®Replace the TCM. WITH THE DRBIIItPERFORM QUICK
LEARN AND REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 8
8 If there are no possible causes remaining, view repair. All
Repair
Replace the Powertrain Control Module. Replace and program the
PCM Module in accordance with the Service Information.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
9 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?All
Ye s®Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
132
TRANSMISSION
P1793-TRD LINK COMMUNICATION ERROR ÐContinued

TEST ACTION APPLICABILITY
3 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?All
Ye s®Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 4
4 Turn ignition off to the lock position.
CAUTION: Remove the Starter Relay from the IPM. This will prevent the
vehicle from being started in gear.
Install Transmission Simulator, Miller tool #8333 and the FWD Adapter Cable kit,
Miller tool #8333-1.
Ignition on, engine not running.
Using the Transmission Simulator, set the selector switch to the 3000/1250 position.
Turn the Input/Output switch to ON.
With the DRBIIIt, read the Input and Output Speed Sensor RPM.
Does the Input Speed read 3000 RPM and the Output Speed read 1250 RPM within
50 RPM?All
Ye s®Go To 5
No®Go To 5
5 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the TRS harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Input Speed Sensor Ground circuit from the TCM
harness connector to the Speed Sensor harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Speed Sensor Ground circuit for an open or high
resistance..
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair. All
Repair
Replace the TCM. WITH THE DRBIIItPERFORM QUICK
LEARN AND REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
134
TRANSMISSION
P1794-SPEED SENSOR GROUND ERROR ÐContinued

Symptom:
P1796-AUTOSTICK SENSOR CIRCUIT
POSSIBLE CAUSES
VERIFY AUTOSTICK OPERATION WITH SWITCH IN THE DOWN POSITION
VERIFY AUTOSTICK OPERATION WITH SWITCH IN THE UP POSITION
VERIFY OD OFF SWITCH OPERATION
INTERMITTENT OPERATION
AUTOSTICK/OD OFF MUX INPUT CIRCUIT OPEN
AUTOSTICK/OD OFF SWITCH ASSEMBLY GROUND CIRCUIT OPEN
AUTOSTICK/OD OFF MUX INPUT CIRCUIT SHORT TO GROUND
AUTOSTICK/OD OFF MUX INPUT CIRCUIT SHORT TO VOLTAGE
TCM - AUTOSTICK INPUT CIRCUIT
TEST ACTION APPLICABILITY
1 With the DRBIIIt, Check the STARTS SINCE SET counter.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter for P1796 set at 0?All
Ye s®Go To 2
No®Go To 11
2 Turn the ignition on.
Select the Autostick position with the gear selector.
With the DRBIIIt, observe the Autostick switch voltage.
NOTE: Do not press any Autostick switches while reading the voltage.
Is the voltage between 3.8 - 4.8 volts?All
Ye s®Go To 3
No®Go To 6
3 Turn the ignition on.
Select the Autostick position with the gear selector.
With the DRBIIIt, observe the Autostick switch voltage.
Push the Autostick down switch.
Is the voltage between 0.3 - 1.6 volts?All
Ye s®Go To 4
No®Replace the Autostick/OD OFF switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
4 Turn the ignition on.
Select the Autostick position with the gear selector.
With the DRBIIIt, observe the Autostick switch voltage.
Push the Autostick up switch.
Is the voltage between 1.6 - 2.8 volts?All
Ye s®Go To 5
No®Replace the Autostick/OD OFF switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
136
TRANSMISSION

TEST ACTION APPLICABILITY
5 Turn the ignition on.
Select the Drive position with the gear selector.
With the DRBIIIt, observe the Autostick switch voltage.
Push the O/D OFF switch.
Is the voltage between 2.8 - 3.8 volts?All
Ye s®Test Complete.
No®Replace the Autostick/OD OFF switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
6 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Autostick/OD switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the Autostick/OD Off Mux Input circuit between the
Autostick/OD switch harness connector and the TCM harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the open Autostick/OD Off Mux Input circuit.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
7 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Autostick/OD switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the ground circuit between the Autostick/OD switch
harness connector and ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair the open Autostick/OD Off Switch ground circuit, if an
open in the ground wire is not found, replace the Autostick/OD Off
Switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
8 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Autostick/OD switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the Autostick/OD Off Mux Input circuit to Ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Autostick/OD Off Mux Input circuit for a short to
ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 9
137
TRANSMISSION
P1796-AUTOSTICK SENSOR CIRCUIT ÐContinued

TEST ACTION APPLICABILITY
9 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the Autostick/OD switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Autostick/OD Off Mux Input circuit.
Is the voltage above 5.5 volts?All
Ye s®Repair the Autostick/OD Off Mux Input circuit for a short to
voltage.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 10
10 If there are no possible causes remaining, view repair. All
Repair
Replace the TCM. WITH THE DRBIIItPERFORM QUICK
LEARN AND REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
11 The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Test drive the vehicle through all Autostick gears.
Were any problems found or did the DTC return?All
Ye s®Repair any wiring/connector problems as necessary. If the DTC
set, return to the symptom P1796 and perform the diagnostics.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
138
TRANSMISSION
P1796-AUTOSTICK SENSOR CIRCUIT ÐContinued

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Remove the Transmission Oil Pan and Oil Filter per the Service Information.
Install a new Transmission Oil Filter per Service Information.
Reinstall Transmission Oil Pan, and refill with new Transmission Fluid per the
Service Information.
Note: The Transmission Cooler must be flushed before prodceeding.
Start the engine, check and adjust the Transmission Fluid Level per Service
Information.
Allow the engine to idle for 10 minutes, in Park.
Flush the Transmission Oil Cooler per the Service Information.
Turn the ignition off.
Drain and refill the Transmission Fluid.
Flush the Transmission Oil Cooler again.
Start the engine, check and adjust the Transmission Fluid Level per Service
Information.
With the DRBIIIt, perform a Battery Disconnect.
Note: This must be done to re enable EMCC during an A/C Clutch engage-
ment.
The vehicle may exhibit intermittent shudder during the first few hundred miles.
Note: The oil will gradually penetrate the TCC friction material and the
shudder should disappear.
Erase the DTC and return the vehicle to the customer.
Did the Code reset or does the vehicle still shudder after a few thousand miles?All
Ye s®Replace the Torque Convertor per the Service Information. Note:
After replacing the Torque Convertor, use the DRBIII to perform
the TCC Break In procedure. This will prevent possible shudder
conditions.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
141
TRANSMISSION
P1798-WORN OUT/BURNT TRANSAXLE FLUID ÐContinued

TEST ACTION APPLICABILITY
2 With the DRBIIIt, Check the STARTS SINCE SET counter.
NOTE: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter 2 or less?All
Ye s®Go To 3
No®Go To 12
3 Turn the ignition off to the lock position.
CAUTION: Remove the Starter Relay from the IPM. This will prevent the
vehicle from being started in gear.
Install Transmission Simulator, Miller tool #8333 and the FWD Adapter Cable kit,
Miller tool #8333-1.
Ignition on, engine not running.
With the DRBIIIt, monitor the Trans Temp Volts.
On the Transmission Simulator place the Thermistor Voltage Selector Switch to all
three positions. Compare the DRBIIItreading with the numbers on the Transmis-
sion Simulator.
Pick one that best matches your readings.All
DRBIIItreadings always high.
Go To 4
DRBIIItreadings = simulator +/- 0.25 V
Go To 9
DRBIIItreadings always low
Go To 10
DRBIIItreadings erratic.
Go To 12
4 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the TRS harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Speed Sensor Ground circuit from the TCM harness
connector to the TRS harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Speed Sensor Ground circuit for an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the TRS harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Transmission Temperature Sensor Signal circuit from
the TCM harness connector to the TRS harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Transmission Temperature Sensor Signal circuit for
an open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
143
TRANSMISSION
P1799-CALCULATED OIL TEMP IN USE ÐContinued