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DTC P182E or P1915

DTC P182E or P1915

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• 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

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Transmission Range Signal A P182E P1915 P1915 P182E, P1915
Transmission Range Signal B P1915 P182E P182E P182E, P1915
Transmission Range Signal C P1915 P182E P182E P182E, P1915
Transmission Range Signal P P182E P1915 P1915 P182E, P1915
Ground - P182E P182E P182E, P1915


Typical Scan Tool Data

Internal Mode Switch A/B/C/P

Circuit Short to Ground Open Short to Voltage
Operating conditions: Ignition ON, range selector in Park Parameter Normal Range: High/Low
Transmission Range Switch Signal A Low High High
Transmission Range Switch Signal B Low High High
Transmission Range Switch Signal C Low High High
Transmission Range Switch Signal P Low High High


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.

• The engine speed is 400 RPM or greater for 5 seconds.

• The ignition voltage is 8.6 volts or greater.

• The engine torque signal is valid.



P1915

• DTC P0722, P0723, or P1915 is not set.

• The transmission output shaft speed is 90 RPM or less.

• Ignition voltage was 6.0 volts or greater and has not dropped below 2.0 volts.


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


• The engine speed is 50 RPM or less for 0.25 second or greater.

• The engine speed is 50-480 RPM for 0.07 second or greater.

• The 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.

• The TCM commands maximum line pressure.

• The TCM forces the torque converter clutch (TCC) OFF.

• The TCM turns all the solenoids OFF.

• The TCM freezes transmission adaptive functions.

• The TCM limits the transmission to Reverse and 5th gear operation.

• The TCM turns the high side driver (HSD) OFF.

• The TCM inhibits Tap Up/Down function.

• The 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

Connector End View Reference


• Component Connector End Views

• Inline Harness Connector End Views


Description and Operation


• Transmission General Description

• Electronic Component Description for manual shift detent lever with shaft position switch assembly


Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

DT-47825-20 Adapter Harness

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification


1. Perform the Range Selector Lever Cable Adjustment procedure to verify proper adjustment.

2. Ignition ON, engine OFF, observe the scan tool TCM Internal Mode Switch A/B/C/P parameter while moving the gear shift lever from Park, to Reverse and through all the ranges. The parameter should match each gear range that is selected. Refer to Transmission Internal Mode Switch Logic .

3. Observe the scan tool engine control module (ECM) Park/Neutral Position Switch parameter while moving the gear shift lever from Park, to Reverse, Neutral and through all the ranges. The parameter should display Park/Neutral in the Park and Neutral positions, and In Gear in all other positions.

4. After you complete the steps described above, check the diagnostic trouble code is not reset by driving the vehicle according to the conditions for running diagnostic trouble codes (DTC). You can also drive the vehicle according to the conditions you see in Freeze Frame/ Failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections .


Circuit/System Testing


1.
Note
• You must perform the 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.


Ignition OFF, remove the control valve body cover. Refer to 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 IMS connector X2 at the Q8 control solenoid valve assembly.

4. Ignition ON, verify the scan tool IMS A/B/C/P parameter displays HI for all 4 signal circuits.

5. If not the specified value, replace the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .

6. Verify the scan tool ECM PNP Switch parameter displays In Gear.

7. If not the specified value, test the park/neutral signal circuit for a short to ground. If the circuit tests normal, replace K20 Engine Control Module.

8. Connect a 3-amp fused jumper wire between each transmission range signal circuit terminal listed below and the IMS ground circuit, terminal A on the Q8 control solenoid valve assembly. The corresponding scan tool IMS A/B/C/P parameter should display LOW when the terminal is connected to the IMS ground.

• 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.

9. If not the specified value, replace the Q8 control solenoid valve assembly.

10. 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. Verify the ECM PNP Switch parameter changes from IN Gear to Park/Neutral.

11. If not the specified value, test the park/neutral signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

12. If all circuits test normal, replace the B15 transmission internal mode switch.


Repair Instructions

Note
• Perform the Resetting of the transmission's adaption after all transmission repairs.

• Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the TCM.


Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement

• Range Selector Lever Cable Adjustment

• Control Module References for ECM or control solenoid valve assembly replacement, setup, and programming