P0735
DTC P0729 or P0731-P0736
Diagnostic Instructions
* Perform theDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0729
- Incorrect 6th Gear Ratio
DTC P0731
- Incorrect 1st Gear Ratio
DTC P0732
- Incorrect 2nd Gear Ratio
DTC P0733
- Incorrect 3rd Gear Ratio
DTC P0734
- Incorrect 4th Gear Ratio
DTC P0735
- Incorrect 5th Gear Ratio
DTC P0736
- Incorrect Reverse Gear Ratio
Circuit/System Description
The vehicle speed sensor and automatic transmission turbine speed sensor contains a permanent magnet surrounded by a coil that gives off a continuous magnetic field. As the vehicle is driven, a speed sensor rotor located near the magnetic pickup of the speed sensor coil also rotates. This rotation produces a variable voltage signal that is proportional to the transmission turbine and output speed. The transmission control module (TCM) uses the signals to calculate the gear ratio. The TCM compares the computed ratio to the commanded gear ratio.
Conditions for Running the DTC
* Output speed is greater than 200 RPM.
* Ignition voltage is between 9-18 V.
* Shift to range is completed.
* DTCs P0716, P0717, P0721, P0722, P0877, and P0878 are not active.
Conditions for Setting the DTC
P0729
This DTC sets during steady state operation when the calculated sixth gear ratio differs from the known sixth gear ratio for more than 2 seconds.
P0731
This DTC sets during steady state operation when the calculated first gear ratio differs from the known first gear ratio for more than 2 seconds.
P0732
This DTC sets during steady state operation when the calculated second gear ratio differs from the known second gear ratio for more than 2 seconds.
P0733
This DTC sets during steady state operation when the calculated third gear ratio differs from the known third gear ratio for more than 2 seconds.
P0734
This DTC sets during steady state operation when the calculated fourth gear ratio differs from the known fourth gear ratio for more than 2 seconds.
P0735
This DTC sets during steady state operation when the calculated fifth gear ratio differs from the known fifth gear ratio for more than 2 seconds.
P0736
This DTC sets during steady state operation when the calculated reverse gear ratio differs from the known reverse gear ratio for more than 2 seconds.
Action Taken When the DTC Sets
P0729
* The TCM requests the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL).
* The transmission will shift to fifth range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift to neutral. If the shift selector is moved to a forward range or reverse and transmission is compromised by overspeeding or direction change, transmission shifts to neutral.
* DTC P0729 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits torque converter clutch (TCC) engagement.
P0731
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to second range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift to neutral. If the shift selector is moved to a forward range or reverse and transmission is compromised by overspeeding or direction change, transmission shifts to neutral.
* DTC P0731 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits TCC engagement.
P0732
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to third range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift to reverse unless compromised by direction change, then transmission will shift to neutral. If the shift selector is moved to a forward range and transmission is compromised by overspeeding or direction change, transmission shifts to neutral.
* DTC P0732 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits TCC engagement.
P0733
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to fourth range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift to neutral. If the shift selector is moved to a forward range and transmission is compromised by overspeeding or direction change, transmission shifts to neutral.
* DTC P0733 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits TCC engagement.
P0734
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to fifth range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift to reverse unless compromised by direction change, then transmission will shift to neutral. If the shift selector is moved to a forward range and transmission is compromised by overspeeding or direction change, transmission shifts to neutral. If the transmission shifts to neutral due to overspeeding or direction change, the transmission will shift to first, third or fifth when the condition cleared.
* DTC P0734 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits TCC engagement.
P0735
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to fourth range.
* While diagnostic response is active, if shift selector is moved to neutral, the transmission will shift to neutral. If the transmission is shifted to reverse (R), the transmission will shift neutral. If the shift selector is returned to forward and transmission is compromised by overspeeding or direction change, transmission shifts to neutral.
* DTC P0735 is stored in TCM history.
* The TCM freezes shift adapts.
* The TCM inhibits TCC engagement.
P0736
* The TCM requests the ECM to illuminate the MIL.
* The transmission will shift to neutral.
* DTC P0736 is stored in TCM history.
Conditions for Clearing the DTC
DTC P0729, P0731, P0732, P0733, P0734, P0735, and P0736 are Type A DTCs.
Diagnostic Aids
* You will have to drive the vehicle in order to experience a condition.
* Incorrect ratio DTCs may indicate a component condition with piston seals, clutch plates, or solenoids.
* Incorrect ratio DTCs may be caused by a faulty speed sensor signal.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
* Transmission General Description (Transmission General Description)
* Transmission Component and System Description (Transmission Component and System Description)
* Electronic Component Description (Electronic Component Description)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Inspect the transmission fluid level. Refer to Transmission Fluid Check (Transmission Fluid Check) .
2. Perform a road test. Refer to Road Test (Road Test Procedure) .
3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed on the Freeze Frame/Failure Records data.
Circuit/System Testing
Note
You must perform the Circuit/System Verification first.
1. Perform a line pressure test. Refer to Line Pressure Check (Line Pressure Check) .
• If line pressure is low in all ranges, refer toLow Main Line Pressure in All Ranges (Low Main Line Pressure In All Ranges) .
• If line pressure is low in a specific range or ranges, refer toLow Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges (Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges) .
Warning
Chock the wheels to prevent the vehicle from moving. Failure to chock the wheels can cause personal injury when the electrical system is repaired.
2. Perform the clutch test. Refer to Clutch Test (Clutch Test) .
• If not the specified value, refer toExcessive Slippage and Clutch Chatter (Excessive Slippage and Clutch Chatter) .
3. If the above test is normal, refer toFunctional Test (Functional Test Procedure) .
Repair Instructions
Perform theDiagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Speed Sensor Replacement (Service and Repair) , 2WD
* Vehicle Speed Sensor Replacement (Service and Repair) , 4WD
* Control Valve Solenoid Replacement (SS1, SS2, SS3, TCC, and MAIN MOD) (Control Valve Solenoid Replacement (SS1, SS2, SS3, TCC, and MAIN MOD))Control Valve Solenoid Replacement (PCS1 and PCS2) (Control Valve Solenoid Replacement (PCS1 and PCS2)) for PCS1 or PCS2 replacement.
* Control Valve Body Cleaning and Inspection (Overhaul)
Repair Verification
If another DTC is present, refer toDiagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions) and perform the appropriate diagnostic procedure.