Chrysler RG Voyager. Manual — part 1302
TEST
ACTION
APPLICABILITY
6
If there are no possible causes remaining, view repair.
All
Repair
Repair internal transmission per the Service Information. Check
all of the components related to the OD and 2/4 clutches. Inspect
the Oil Pump and repair or replace per the Service Information.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
209
TRANSMISSION - NGC
P0734-GEAR RATIO ERROR IN 4TH —
Continued
Symptom:
P0736-GEAR RATIO ERROR IN REVERSE
When Monitored and Set Condition:
P0736-GEAR RATIO ERROR IN REVERSE
When Monitored:
The Transmission gear ratio is monitored continuously while the
Transmission is in gear.
Set Condition:
If the ratio of the Input RPM to the Output RPM does not match the
current gear ratio.
POSSIBLE CAUSES
RELATED DTC’S PRESENT
INTERNAL TRANSMISSION
INTERMITTENT GEAR RATIO ERRORS
TEST
ACTION
APPLICABILITY
1
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 Engine DTC’s. Check and repair all Engine DTC’s prior to
performing any 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 Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.
All
Continue
210
TRANSMISSION - NGC
TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, read Transmission DTC’s.
If any of these DTC’s are present, perform their respective tests first.
Are there any Loss of Prime, Line Pressure Sensor and/or Speed Sensor DTCs
present?
All
Yes
→ Refer to the Transmission category and perform the appropriate
symptom. If any of these DTC’s are present, they will cause a gear
ratio error. Perform the test for Loss of Prime first if it is present.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Go To 3
3
With the DRBIII
t, perform the Reverse Gear Clutch test. Follow the instructions on
the DRBIII
t.
Increase the throttle angle or TPS Degree to 30° for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass - Input Speed remain at zero?
All
Yes
→ Go To 4
No
→ Go To 5
4
The conditions to set this DTC are not current at this time.
Check the gearshift linkage adjustment.
Gear ratio DTC’s can be set by problems in the Input and Output Speed Sensor
circuits. If the vehicle passes the clutch test and still sets gear ratio DTC’s, check the
Speed Sensors for proper operation.
Remove the Starter Relay.
With the DRBIII
t, check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Check the Speed Sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator, Miller tool #8333 and Electronic
Transmission Adapter kit, Miller tool #8333-1.
This DTC can also be set under extreme temperature conditions, this is usually
caused by an internal problem. Verify if the problem is only experienced under
extreme hot or cold conditions.
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 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Test Complete.
5
If there are no possible causes remaining, view repair.
All
Repair
Repair internal transmission per the Service Information. Check
all of the components related to the Reverse and LR clutches.
Inspect the Oil Pump and repair or replace per the Service
Information.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
211
TRANSMISSION - NGC
P0736-GEAR RATIO ERROR IN REVERSE —
Continued
Symptom:
P0740-TCC OUT OF RANGE
When Monitored and Set Condition:
P0740-TCC OUT OF RANGE
When Monitored:
The Torque Converter Clutch (TCC) is in FEMCC or PEMCC, Trans-
mission temperature is hot, Engine temperature is greater than 38° C or 100° F,
Transmission Input Speed greater than 1750 RPM, TPS less than 30°.
Set Condition:
The TCC is modulated by controlling the duty cycle of the L/R Solenoid
until the difference between the Engine and the Transmission Input Speed RPM or duty
cycle is within a desired range. The DTC is set after the period of 10 seconds and 3
occurrences of either: FEMCC - with slip greater than 100 RPM or PEMCC - duty cycle
greater than 85%.
POSSIBLE CAUSES
RELATED DTC’S PRESENT
INTERNAL TRANSMISSION
INTERMITTENT WIRING AND CONNECTORS
TEST
ACTION
APPLICABILITY
1
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 Engine DTC’s. Check and repair all Engine DTC’s prior to
performing any 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 Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.
All
Continue
212
TRANSMISSION - NGC
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