Chrysler Voyager. Manual — part 458
TEST
ACTION
APPLICABILITY
7
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 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.
8
The conditions necessary to set the DTC are not present at this time. Using the
schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorted and open circuits.
Check the vehicles battery condition.
Check the power and ground circuits of the Transmission Control Module.
With the DRBIII
t, check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Were any problems found?
All
Yes
→ Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Test Complete.
59
TRANSMISSION - EATX
P0725-ENGINE SPEED SENSOR CIRCUIT —
Continued
Symptom:
P0731-GEAR RATIO ERROR IN 1ST
When Monitored and Set Condition:
P0731-GEAR RATIO ERROR IN 1ST
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
INTERMITTENT GEAR RATIO ERRORS
INTERNAL TRANSMISSION
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 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
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 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 3
60
TRANSMISSION - EATX
TEST
ACTION
APPLICABILITY
3
With the DRBIII
t, perform the 1st Gear Clutch Test. Follow the manuals on the
DRBIII
t.
Increase the throttle angle, 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 0?
All
Yes
→ Go To 4
No
→ Go To 5
4
The conditions to set this DTC are not present 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.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Check the Speed Sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator, Miller tool #8333 and the Electronic
Transmission Adapter kit 8333-1A.
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 41TE 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 components related to the Underdrive and L/R clutches.
Inspect the Oil Pump per the Service Information and repair or
replace as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
61
TRANSMISSION - EATX
P0731-GEAR RATIO ERROR IN 1ST —
Continued
Symptom:
P0732-GEAR RATIO ERROR IN 2ND
When Monitored and Set Condition:
P0732-GEAR RATIO ERROR IN 2ND
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
RELATED PRESSURE SWITCH DTC’S PRESENT
INTERMITTENT GEAR RATIO ERRORS
TRANSMISSION - INTERNAL
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 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
62
TRANSMISSION - EATX
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