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 Indicates - Invalid Range
DTC P1915
- Internal Mode Switch Does Not Indicate Park/Neutral 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 assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the Transmission Control Module from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the Transmission Control Module 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. The input parameters represented are transmission range signal A, Signal B, signal C, and signal P.
Conditions for Running the DTC
P182E
* TCM DTCs: P0716, P0717, P0722, P0723, P07C0, P07BF, P077C or P077D is not set.
* ECM DTCs: P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401 or P042E is not set.
* The engine speed is between 400-7500 RPM.
* The ignition voltage is between 8.6-32 V.
* Engine torque signal is valid.
P1915
* DTC P0722 or P0723 is not set.
* The transmission output shaft speed is less than 90 RPM or less.
* The ignition voltage is between 8.6-32 V.
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 Electrical Diagrams
Connector End View Reference
* Component Connector End Views Fuel Pump and Level Sensor Assembly - Primary
* Inline Harness Connector End Views X102
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 Control Module References for scan tool information
Circuit/System Verification
1. Verify DTC P0850, P0851 or P0852 is set.
• If any of the DTCs are set
Refer to DTC P0850-P0852 P0850.
• If none of the DTCs are set
2. Verify the range selector cable is adjusted correctly. Refer to Shift Control Linkage Adjustment Adjustments.
• If the cable adjustment is not OK
Adjust, repair or replace as necessary.
• If the cable adjustment is OK
3. Ignition ON.
4. Verify the scan tool parameter matches the Transmission Internal Mode Switch Logic table for each gear position. Refer to Transmission Internal Mode Switch Logic Transmission Internal Mode Switch Logic.
• If the parameter does not match
Refer to Circuit/System Testing.
• If the parameter matches
5. Verify the scan tool Engine Control Module Park/Neutral parameter displays Park with the gear selector in Park position and Neutral with the gear selector in Neutral position.
• If the P/N parameter does not match when the gear selector is in Park or Neutral
Refer to Circuit/System Testing.
• If the P/N parameter does match when the gear selector is in Park/Neutral
6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
7. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
8. All OK.
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 B15 Transmission Internal Mode Switch connector at the Q8 Control Solenoid Valve Assembly. Ignition ON.
3. Verify the scan tool Engine Control Module Park/Neutral parameter displays In Gear.
• If In Gear is not displayed
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K20 Engine Control Module.
• If In Gear is displayed
4. Verify the scan tool parameter displays High for each signal circuit.
• If High is not displayed for each signal circuit
Replace the Q8 control solenoid valve assembly.
• If High is displayed for each signal circuit
5. Install a 3 A fused jumper wire between the ground circuit terminal A and each signal circuit listed below one at a time.
* Signal A - terminal E to terminal A
* Signal B - terminal D to terminal A
* Signal C - terminal C to terminal A
* Signal P - terminal B to terminal A
6. Verify the scan tool Internal Mode Switch A/B/C/P parameters display Low when each circuit is grounded.
• If Low is not displayed for each circuit
Replace the Q8 control solenoid valve assembly.
• If Low is displayed
7. Replace the B15 Transmission Internal Mode Switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Perform the Reset Transmission Adapts Reset Procedure following all transmission related repairs.
* 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.
* Manual Shift Shaft Position Switch Replacement Service and Repair for internal mode switch (IMS) replacement.
* Control Module References Control Module References for control solenoid valve assembly replacement, programming, and setup.