P182E
DTC P182E or P1915
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC P182E
- Internal Mode Switch - Invalid Range
DTC P1915
- Internal Mode Switch Does Not Indicate Park/Neutral (P/N) During Start
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The manual shift detent lever with shaft position switch assembly or internal mode switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the transmission control module (TCM) from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as IMS. The IMS input parameters represented are transmission range signal A, Signal B, signal C, and signal P.
Conditions for Running the DTC
P182E
* DTC P182E is not set
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is greater than 8.6 volts.
* Engine torque signal is valid.
P1915
* No OSS DTCs P0722 or P0723 and are not Fault Active or Test Fail this Key ON.
* The transmission output shaft speed is less than 90 RPM or less.
* The ignition voltage is between 8.6 volts or greater.
Conditions for Setting the DTC
P182E
The IMS does not indicate a valid Park, Reverse, Neutral or Drive Range gear position for 7 seconds.
P1915
The manual shift shaft IMS switch assembly does not indicate Park or Neutral during the following sequence:
* The engine speed is less than 50 RPM for more than 0.15 seconds.
* The engine speed is 50-480 RPM for more than 0.07 seconds.
* The engine speed is greater than 525 RPM for more than 3.25 seconds.
* The transmission input shaft speed is 200 RPM or greater.
Action Taken When the DTC Sets
* DTCs P182E and P1915 are Type A DTCs.
* The TCM commands maximum line pressure.
* The TCM turns off all solenoids - HSD1 and HSD2.
* The TCM freezes transmission adaptive functions.
* The TCM defaults the transmission to third gear if the current gear is 1st, 2nd, or 3rd; or fifth gear if the current gear is 4th, 5th, or 6th gear.
* The TCM inhibits TCC.
* The TCM inhibits Tap up and Tap down functions.
Conditions for Clearing the DTC
DTCs P182E and P1915 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
* Component Connector End Views (Connector End Views By Name)
* Inline Harness Connector End Views (Connector End Views By Number)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Description and Operation
* Electronic Component Description (Electronic Component Description)
* Transmission General Description (Transmission General Description)
* Transmission Component and System Description (Transmission Component and System Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Circuit/System Verification
1. Perform the Shift Control Linkage Adjustment (Adjustments) procedure to verify proper adjustment.
2. Ignition ON, observe the scan tool IMS parameter while moving the gear shift lever from Park, through all gear selector positions, and back to Park. The parameter should match each gear range that is selected. Refer to Transmission Internal Mode Switch Logic (Transmission Internal Mode Switch Logic).
3. Observe the scan tool Engine Control Module P/N switch parameter with the gear selector in Park and Neutral position. The parameter should display Park in park position and Neutral in neutral position.
4. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections).
Circuit/System Testing
Note: You must perform Circuit/System Verification first.
1. Ignition OFF, remove the automatic transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement).
2. Disconnect the IMS connector at the Q8 control solenoid valve assembly.
Note: Under certain driving conditions, DTC P182E could set due to an intermittent low voltage fault on the P/N signal circuit, before conditions for setting DTC P0851 are met.
3. Ignition ON, verify the scan tool engine control module (ECM) P/N switch displays In Gear.
• If not the specified value, test the P/N signal circuit for a short to ground. If the circuit tests normal, replace the engine control module.
4. Verify the scan tool IMS A/B/C/P parameter displays HI for all four signal circuits.
• If not the specified value, replace the Q8 control solenoid valve assembly.
5. Connect a 3A fused jumper wire between each transmission range signal circuit terminals listed below and the IMS ground circuit. The appropriate scan tool IMS A/B/C/P parameter should display LOW when the terminal is connected to the IMS ground circuit.
* Switch Signal A: terminal E to terminal A
* Switch Signal B: terminal D to terminal A
* Switch Signal C: terminal C to terminal A
* Switch Signal P: terminal P to terminal A
• If not the specified value, replace the Q8 control solenoid valve assembly.
6. If all circuits test normal, test or replace the IMS.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Note:
* Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Control Solenoid Valve and Transmission Control Module Assembly Inspection) before replacing any internal transmission components.
* Perform the Service Fast Learn Adapts (Programming and Relearning) following all transmission repairs.
* Manual Shift Shaft Position Switch Replacement (Service and Repair)for internal mode switch (IMS) replacement.
* Control Module References (Programming and Relearning)for control solenoid valve assembly replacement, setup, and programming.