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Chrysler Town, Dodge Caravan. Manual - part 1028

TEST

ACTION

APPLICABILITY

With the DRBIII

t, read Transmission DTC’s.

Are any of the following DTCs P1694, P0731, P0732, P0733, P0734, P0736 present
also?

All

Yes

→ If any of these codes are present, disregard the P1793 DTC and

refer to the Transmission category and perform the appropriate
symptom.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 3

With the DRBIII

t, 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

Yes

→ Go To 4

→ Go To 9

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

Yes

→ Repair the Torque Management Request Sense circuit for an

open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 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

Yes

→ Repair Torque Management Request Sense circuit for a short to

ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 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.
Is the voltage above 10.5 volts?

All

Yes

→ Repair Torque Management Request Sense circuit for a short to

voltage.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 7

148

TRANSMISSION - EATX

P1793-TRD LINK COMMUNICATION ERROR —

Continued

TEST

ACTION

APPLICABILITY

All

Yes

→ Replace the Transmission Control Module per the Service Infor-

mation. WITH THE DRBIII

t PERFORM QUICK LEARN AND

REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 8

Using the schematics as a guide, inspect the wiring and connectors. Repair as
necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module per the
Service Information.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

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 shorted and open circuits.
With the DRBIII

t, check the EATX EVENT DATA to help identify the conditions in

which the DTC was set.
Were there any problems found?

All

Yes

→ Repair as necessary.

Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Test Complete.

149

TRANSMISSION - EATX

P1793-TRD LINK COMMUNICATION ERROR —

Continued

Symptom:

P1794-SPEED SENSOR GROUND ERROR

When Monitored and Set Condition:

P1794-SPEED SENSOR GROUND ERROR

When Monitored:

The transmission gear ratio is monitored continuously while the

transmission is in gear.

Set Condition:

After a TCM reset in neutral and Input/Output equals a ratio of input to

output of 2.5 to 1.

POSSIBLE CAUSES

SPEED SENSOR GROUND CIRCUIT OPEN

TRANSMISSION CONTROL MODULE

INTERMITTENT WIRING AND CONNECTORS

TEST

ACTION

APPLICABILITY

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

t, read the engine DTC’s. Check and repair all engine DTC’s prior

to performing Transmission Symptom Diagnostics.
With the DRBIII

t, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures.

NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC’s, check and record all CVI’s.
Most DTC’s set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB’s related to the symptom.
Perform this procedure prior to Symptom diagnosis.

All

Continue

Go To

150

TRANSMISSION - EATX

TEST

ACTION

APPLICABILITY

Turn the ignition off to the lock position.
Remove the Starter Relay.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit, Miller tool #8333-1A.
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 DRBIII

t, 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

Yes

→ Go To 3

→ Go To 4

t, check the EATX EVENT DATA to help identify the conditions in

which the DTC was set.
Were there any problems found?

All

Yes

→ Repair as necessary.

Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Test Complete.

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

Yes

→ Repair the Speed Sensor Ground circuit for an open or high

resistance.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

→ Go To 5

All

Repair

Replace the Transmission Control Module per the Service Infor-
mation. WITH THE DRBIII

t PERFORM QUICK LEARN AND

REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.

151

TRANSMISSION - EATX

P1794-SPEED SENSOR GROUND ERROR —

Continued

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