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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 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, also known as the transmission internal mode switch 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 parameter. The IMS input parameters represented are transmission range Signal A, Signal B, Signal C, and Signal P. There is also an input to the Engine Control Module (ECM) for neutral start. The state of the neutral start switch is displayed on the scan tool ECM display as Park/Neutral Position Switch parameter.

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, P0716, P0717, P0722, P0723, P07C0, P07BF, P077C, OR P077D is not set.

* Engine speed is 400-7500 RPM for 5 s.

* Ignition voltage is 9-32 V.

* 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 6-32 V.

Conditions for Setting the DTC

P182E

Internal mode switch does not indicate a valid Park, Reverse, Neutral, or Drive Range position for 7 s.

P1915

Internal mode switch does not indicate Park or Neutral during the following sequence:

* Engine speed is less than 50 RPM for greater than 0.10 s.

* Engine speed is 50-480 RPM for greater than 0.07 s.

* Engine speed is greater than 500 RPM and the transmission input speed is greater than 100 RPM for greater than 1.25 s.

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 Tools and Equipment.

Circuit/System Verification

1. Verify the range selector lever cable is adjusted properly. Refer to Range Selector Lever Cable Adjustment Adjustments.

• If cable adjustment is not OK
Repair as necessary.

• If cable adjustment is OK

2. Ignition ON.

3. Verify the scan tool TCM Internal Mode Switch A/B/C/P parameter matches the Transmission Internal Mode Switch Logic Transmission Internal Mode Switch Logic table for each transmission 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 (ECM) Park/Neutral Position Switch parameter displays Park/Neutral with the gear shift lever in Park or Neutral and In Gear in Reverse 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 a DTC sets
Refer to Circuit/System Testing.

• If a 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 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 and disconnect the vehicle harness X1 connector at the Q8 Control Solenoid Valve Assembly.

2. Install the DT-48616-10 - adapter harness to the X1 connector at Q8 Control Solenoid Valve Assembly.

3. Test for infinite resistance between the DT-48616-10 - adapter harness connector terminals 2 and 3.

• If less than infinite resistance, replace the Q8 Control Solenoid Valve Assembly.

• If infinite resistance.

4. Test for infinite resistance between the 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

6. Verify the scan tool TCM 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

7. Install a 3 A fused jumper wire between the low reference circuit terminal F and each signal circuit listed below one at a time at the Q8 Control Solenoid Valve Assembly.

* Signal A - terminal B

* Signal B - terminal C

* Signal C - terminal D

* Signal P - terminal E

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-amp fused jumper wire between terminal A and terminal F.

10. Verify the ECM 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 and disconnect the X1 connector at the Q8 Control Solenoid Valve Assembly.

2. Install the DT-48616-10 - adapter harness to the X1 connector at the Q8 Control Solenoid Valve Assembly.

3. Test for less than 2 ohms between the adapter harness terminal 2 and the X2 connector terminal F at the Q8 Control Solenoid Valve Assembly.

• If greater than 2 ohms, replace the Q8 Control Solenoid Valve Assembly.

• If less than 2 ohms.

4. Test for less than 2 ohms in the vehicle harness 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 Park/Neutral is displayed

11. Replace the B15 Transmission Internal Mode Switch.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Perform the Transmission Adaptive Values Learn Transmission Adaptive Values Learn following all transmission related 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.

* Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.

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