Dodge 2004 Neon SX2 Diagnostic Manual page 794

P0731-GEAR RATIO ERROR IN 1ST —
TEST
2 With the DRBIII , 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?
Yes → Refer to appropriate symptom in the Transmission category. If
→ Go To 3
No
3 With the DRBIII , perform the 1st gear clutch test. Follow the instructions on the
DRBIII .
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?
Yes → Go To 4
→ Go To 5
No
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, 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 wiring and connectors for the Speed Sensors for a 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 , check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Were there any problems found?
Yes → Repair as necessary.
→ Test Complete.
No
5 If there are no possible causes remaining, view repair.
Repair
ACTION
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 (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
Repair internal Transmission per the Service Information. Check
all of the components related to the UD and LR clutches. Inspect
the Oil Pump and repair or replace per the Service Information.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
TRANSMISSION - NGC
Continued
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APPLICABILITY
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