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Diagnostic Procedure

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DIAGNOSTIC TEST REFERENCE - P1736-GEAR RATIO ERROR IN 2ND PRIME

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®, read the engine DTC's. Check and repair all engine DTC's prior to performing transmission symptom diagnostics.With the DRBIII®, 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 the flash level of the transmission controller. Some problems are corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.ContinueGo To 2		 All
2 With the DRBIII®, check for other transmission DTC's
Are any of the DTC's P0944, P0715, P0720, P1794, P0867, P0932, P0868, or P0869 also present?
Yes --> If any of these DTCs are present, they will cause a speed ratio error. Refer to appropriate symptom in the TRANSMISSION CATEGORY . Perform the test for P0944 first if it is present.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .
No --> Go To 3		 All
3 With the DRBIII®, perform the 2nd prime Gear Clutch Test. Follow the instructions on the DRBIII®.
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 zero?
Yes --> Go To 4
No --> Go To 5		 All
4 The conditions to set this DTC are not currently present.
Check the gearshift linkage adjustment.
Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit.
Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Transmission Simulator, Miller tool # 8333.
Gear ratio DTC's 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 DTC EVENT DATA to help identify the conditions in which the DTC was set.
If there are no possible causes remaining, view repair.
Repair
Repair as necessary. Refer to the Service Information for the proper internal repair procedure.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .		 All
5 If there are no possible causes remaining, view repair.
Repair
Repair transmission as necessary. If there were any line pressure DTC's present along with this DTC, make sure to inspect the pump and Pressure Control Solenoid per the Service Information.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .		 All
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