P1915
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 Start/Wrong Range
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 manual shift detent lever within the transmission. The 4 inputs to the transmission control module (TCM), from the switch, indicate the position 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 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
* 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, P0722, or P0723 is not set.
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 8.6 volts or greater.
* 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 was 5.0 volts or greater, and has not dropped below 2.0 volts.
Conditions for Setting the DTC
P182E
IMS does not indicate a valid Park, Reverse, Neutral or Drive Range gear position for 7 seconds.
P1915
IMS does not indicate Park or Neutral during the following sequence:
* Engine speed is 50 RPM or less for 0.25 seconds or greater.
* Engine speed is 50-480 RPM for 0.07 seconds or greater.
* Engine speed is 525 RPM or greater and the transmission input speed is 200 RPM or greater for 1.25 seconds.
Action Taken When the DTC Sets
* DTCs P182E and P1915 are Type A DTCs.
* TCM commands maximum line pressure.
* TCM forces the torque converter clutch (TCC) OFF.
* TCM turns all the solenoids OFF.
* TCM freezes transmission adaptive functions.
* TCM limits the transmission to Reverse and 3rd or 5th gear operation.
* TCM turns the high side driver (HSD) OFF.
* TCM inhibits neutral idle.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
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 A/C Compressor Clutch
* Inline Harness Connector End Views X101
Description and Operation
* Transmission General Description Transmission General 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-47825-20 - Adapter Harness
For equivalent regional tools, refer to Special Tools Tools and Equipment.
Circuit/System Verification
1. Perform the Range Selector Lever Cable Adjustment Adjustments procedure to verify proper adjustment.
2. Ignition ON.
3. Verify the scan tool TCM IMS A/B/C/P parameter values are correct with the gear shift lever in Park, Reverse, Neutral and all forward positions. 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. Verify the scan tool engine control module (ECM) PNP Switch parameter displays Park/Neutral with the gear shift lever in Park and Neutral and In Gear with the gear shift lever in Reverse and all forward positions.
• If the PNP Switch parameter does not display the correct values
Refer to Circuit/System Testing below.
• If the PNP 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.
* Under certain driving conditions, DTC P182E could set due to an intermittent low voltage fault on the park/neutral signal circuit, before conditions for setting DTC P0851 are met.
1. Ignition OFF, 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 20-way transmission connector to the Q8 control solenoid valve assembly.
3. Disconnect the B15 transmission internal mode switch connector X2 at the Q8 control solenoid valve assembly.
4. Ignition ON.
5. Verify the scan tool IMS A/B/C/P parameter displays High for all 4 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
6. Verify the scan tool ECM PNP Switch parameter displays In Gear.
• If the PNP Switch parameter does not display In Gear
Test the park/neutral signal circuit for a short to ground.
• If circuit is shorted to ground, repair the short to ground on the circuit.
• If circuit is not shorted to ground, replace the K20 engine control module.
• If the PNP Switch parameter displays In Gear
7. Verify the TCM IMS A/B/C/P parameter displays Low when a 3-amp fused jumper wire is connected between each transmission range signal circuit terminal listed below and the IMS ground circuit, terminal A on the Q8 control solenoid valve assembly X2 connector.
* Switch Signal A terminal E to ground circuit terminal A.
* Switch Signal B terminal D to ground circuit terminal A.
* Switch Signal C terminal C to ground circuit terminal A.
* Switch Signal P terminal B to ground circuit terminal A.
• If any IMS parameter does not display Low when the signal circuit is connected to ground
Replace the Q8 control solenoid valve assembly.
• If all IMS parameters display Low when the signal circuit is connected to ground
8. Connect a 3-amp fused jumper wire between park/neutral switch signal circuit terminal F and IMS ground circuit terminal A on the Q8 control solenoid valve assembly X2 connector. Verify the ECM PNP Switch parameter changes from In Gear to Park/Neutral.
• If the ECM PNP Switch parameter does not display Park/Neutral when the signal circuit is connected to ground
Test for less than 2 ohms in the park/neutral signal circuit, end to end.
• If 2 ohms or greater, repair the signal circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If the ECM PNP Switch parameter displays Park/Neutral when the signal circuit is connected to ground
9. Replace the B15 transmission internal mode switch.
Repair Instructions
Note:
* Perform the Reset Transmission Adapts Reset Transmission Adapts 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 the TCM.
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement Service and Repair
* Range Selector Lever Cable Adjustment Adjustments
* Control Module References Control Module References for ECM or control solenoid valve assembly replacement, setup, and programming