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 internal mode switch (IMS) assembly is a sliding contact switch attached to the manual shift detent lever shaft inside 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 Internal Mode Switch A/B/C/P. The IMS input parameters represented are transmission range Signal A, Signal B, Signal C, and Signal P.
Conditions for Running the DTC
P182E
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 9.0 volts or greater.
* DTC 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, P042E, P0716, P0717, P0722, P0723, P07C0, P07BF, P077C, OR P077D is not set.
* Engine torque signal is valid.
P1915
* DTC P0722, P0723, or P1915 is not set.
* Transmission output shaft speed is 90 RPM or less.
* Ignition voltage is 6.0 volts or greater.
Conditions for Setting the DTC
P182E
IMS does not indicate a valid Park, Reverse, Neutral, or Drive Range position for 7 seconds.
P1915
IMS does not indicate Park or Neutral during the following sequence:
* Engine speed is less than 50 RPM for greater than 0.10 second.
* Engine speed is 50-480 RPM for greater than 0.07 second.
* Engine speed is greater than 500 RPM and the transmission input speed is greater than 100 RPM for greater than 1.25 seconds.
Action Taken When the DTC Sets
* DTCs P182E and P1915 are Type A DTCs.
* TCM commands maximum line pressure.
* TCM turns OFF all solenoids.
* TCM freezes transmission adaptive functions.
* TCM limits the transmission to reverse and 5th gear.
* TCM forces the torque converter clutch (TCC) OFF.
* TCM inhibits neutral idle.
* TCM inhibits the Tap Up/Tap Down function.
* TCM inhibits manual shifting of forward gears.
* TCM turns the high side driver OFF.
* TCM enables torque management.
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
* Inline Harness Connector End Views X100
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 for manual shift detent lever with shaft position switch assembly
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
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
Special Tools
DT-48616-10 - Adapter Harness
For equivalent regional tools, refer to Special Tools 6T30/6T40/6T45/6T50 - Automatic Transmission.
Circuit/System Verification
1. Perform the Range Selector Lever Cable Adjustment Adjustments procedure to verify proper adjustment.
2. Ignition ON, engine OFF.
3. Move the gear shift lever through all of the range positions while observing the scan tool TCM Internal Mode Switch A/B/C/P parameter. The parameter should match each range that is selected. Refer to Transmission Internal Mode Switch Logic Transmission Internal Mode Switch Logic.
• If the IMS parameter does not display the correct values
Refer to Circuit/System Testing below.
• If the IMS parameter displays the correct values
4. Move the gear shift lever through all of the range positions while observing the scan tool engine control module (ECM) Park/Neutral Position Switch parameter. The parameter should display Park/Neutral in the Park and Neutral positions, and In Gear in all other positions.
• If the Park/Neutral Position Switch parameter does not display the correct values
Refer to Circuit/System Testing below.
• If the Park/Neutral Position Switch parameter displays the correct values
5. 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. Remove the control valve body cover. Refer to Control Valve Body Cover Replacement Control Valve Body Cover Replacement.
2. Connect the vehicle wire harness X1 14-way transmission connector to the Q8 control solenoid valve assembly.
3. Disconnect the B15 transmission internal mode switch connector at the Q8 control solenoid valve assembly.
4. Ignition ON.
5. Verify the scan tool engine control module (ECM) Park/Neutral Position Switch parameter displays In Gear.
• If the Park/Neutral Switch parameter does not display In Gear
1. Ignition OFF, disconnect the connector at the K20 engine control module.
2. Test for infinite resistance between the neutral signal circuit at the Q8 control solenoid valve X2 connector, terminal A and ground.
• If less than infinite resistance, repair the short to ground in the circuit.
• If infinite resistance, replace the K20 engine control module.
• If the Park/Neutral Switch parameter displays In Gear
6. Verify the scan tool TCM Internal Mode Switch A/B/C/P parameter displays High for all 4 switch signal circuits.
• If the IMS parameter does not display the correct values
Replace the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.
• If the IMS parameter displays the correct values
7. Connect a 3-amp fused jumper wire between each transmission range signal circuit terminal listed below and the IMS ground circuit, terminal F on the Q8 control solenoid valve assembly X2 connector while monitoring the scan tool TCM Internal Mode Switch A/B/C/P parameter. The appropriate scan tool TCM Internal Mode Switch A/B/C/P parameter should display Low when the terminal is connected to the IMS ground.
* Switch Signal A: terminal B to ground circuit terminal F
* Switch Signal B: terminal C to ground circuit terminal F
* Switch Signal C: terminal D to ground circuit terminal F
* Switch Signal P: terminal E to ground circuit terminal F
• If the IMS parameter does not display the correct values
Replace the Q8 control solenoid valve assembly.
• If the IMS parameter displays the correct values
8. Connect a 3-amp fused jumper wire between park/neutral switch signal circuit terminal A and IMS ground circuit terminal F on the Q8 control solenoid valve assembly.
9. Verify the ECM Park/Neutral Position Switch parameter changes from In Gear to Park/Neutral.
• If the ECM Park/Neutral Position Switch parameter does not display Park/Neutral
1. Ignition OFF, remove the connector at the K20 engine control module.
2. Test for less than 2 ohms in the park/neutral signal circuit, end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If the ECM Park/Neutral Position Switch parameter displays Park/Neutral
10. Replace the B15 transmission internal mode switch. Refer to Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement Service and Repair.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUW) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 1 with 1.4L - LCU, 1.6L - LDE or LFJ, 1.8L - LUControl Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV) Control Solenoid Valve and Transmission Control Module Assembly Inspection (Gen 2 with 1.4L - LUV).
* Refer to Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.
* Perform the Transmission Adaptive Values Learn Programming and Relearning following all transmission related repairs.
* For IMS replacement, perform the Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement Service and Repair.