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 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 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 the internal mode switch A/B/C/P parameter. The internal mode switch input parameters represented are transmission range Signal A, Signal B, Signal C, and Signal P.
The park/neutral position switch is integrated into the transmission internal mode switch. The circuit uses the TCM as a pass-through connector only.
The park/neutral signal is sent from the park/neutral switch directly to the engine control module (ECM) and is used for engine start enable.
Conditions for Running the DTC
P182E
* DTC P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0401, P042E, P0716, P0717, P0722, or P0723 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is greater than 8.5 V.
* Engine torque signal is valid.
P1915
* DTC P0722 or P0723 is not set.
* Transmission output shaft speed is 90 RPM or less.
* Ignition voltage was 5 V or greater, and has not dropped below 2 V.
Conditions for Setting the DTC
P182E
Internal mode switch does not indicate a valid Park, Reverse, Neutral or Drive Range gear position for 7 s.
P1915
Internal mode switch does not indicate Park or Neutral during the following sequence:
* Engine speed is 50 RPM or less for 0.25 s or greater.
* Engine speed is 50-480 RPM for 0.07 s or greater.
* Engine speed is 525 RPM or greater and the transmission input speed is 200 RPM or greater for 1.25 s.
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 5th gear operation.
* Torque management is enabled.
* TCM turns the high side driver OFF.
* 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.
Diagnostic Aids
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. Reference Information
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 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
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. Verify the range selector lever cable is adjusted correctly. Refer to Range Selector Lever Cable Adjustment Adjustments.
• If cable adjustment is not correct
Repair as necessary.
• If cable adjustment is correct
2. Ignition ON.
3. Verify the scan tool transmission control module Internal Mode Switch A/B/C/P parameter matches the Transmission Internal Mode Switch Logic Transmission Internal Mode Switch Logic table for each gear shift lever position.
• If the parameter does not match
Refer to Circuit/System Testing.
• If the parameter matches
4. Verify the scan tool engine control module Park/Neutral Position Switch parameter displays Park/Neutral with the gear shift lever in Park or Neutral and In Gear when in Reverser or Drive.
• If Park/Neutral or In Gear is not displayed
Refer to Circuit/System Testing.
• If Park/Neutral and In Gear is displayed
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
6. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
7. All OK.
Circuit/System Testing
Note:
* You must perform Circuit/System Verification first.
1. Ignition OFF, remove the control valve body cover.
2. Connect the vehicle harness 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 transmission control module Internal Mode Switch A/B/C/P parameter displays High High High High.
• If High High High High is not displayed
Replace the Q8 control solenoid valve assembly.
• If High High High High is displayed
6. Verify the scan tool engine control module Park/Neutral Position Switch 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 neutral start signal circuit and ground at the vehicle harness K20 Engine Control Module connector.
• 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
7. Install a 3 A fused jumper wire between the low reference circuit terminal A and each signal circuit listed below one at a time at the Q8 Control Solenoid Valve Assembly.
* Signal A - terminal E
* Signal B - terminal D
* Signal C - terminal C
* Signal P - terminal B
8. Verify the scan tool TCM A/B/C/P displays 1 Low and 3 High when a signal circuit is grounded.
• If 1 Low and 3 High is not displayed
Replace the Q8 control solenoid
valve assembly.
• If 1 Low and 3 High is displayed
9. Connect a 3 A fused jumper wire between park/neutral switch signal circuit terminal F and low reference circuit terminal A at the Q8 Control Solenoid Valve Assembly.
10. Verify the scan tool engine control module Park/Neutral Position Switch parameter displays Park/Neutral.
• If Park/Neutral is not displayed
1. Ignition OFF, disconnect the connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the 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 Park/Neutral is displayed
11. Replace the B15 Transmission Internal Mode Switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repairs.
* Perform the Reset Transmission Adapts Reset Procedure following all transmission repairs.
* Control Valve Body Cover Replacement Control Valve Body Cover Replacement
* Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair
* 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, programming, and setup.