B153E
DTC B153E
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.
DTC Descriptors
DTC B153E 02
- Liftgate Position Sensor Reference Voltage Circuit Short to Ground
DTC B153E 05
- Liftgate Position Sensor Reference Voltage Circuit Short to Battery or Open
DTC B153E 08
- Liftgate Position Sensor Signal Circuit Signal Invalid
Diagnostic Fault Information
Circuit/System Description
The power liftgate module (LGM) uses an optical sensor to monitor the liftgate position at all times. The optical sensor requires a 5-volt reference circuit and a low reference circuit from the LGM. There are 2 liftgate position sensor signal circuits from the liftgate module to the optical sensor. The optical sensor sends pulses through both signal circuits to the LGM whenever the liftgate is in motion. The optical sensor pulses allow the LGM to calculate the liftgate position at all times. The optical sensor signal circuits switch from 0.01-0.45 volt as the liftgate is moving.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
* DTC B153E 02 will set when the LGM detects a short to ground in the liftgate motor assembly position sensor 5-volt reference circuit.
* DTC B153E 05 will set when the LGM detects a short to voltage or an open/high resistance in the liftgate motor assembly position sensor 5-volt reference circuit.
* DTC B153E 08 will set when the LGM does not detect optical sensor pulses when the liftgate is in motion.
Action Taken When the DTC Sets
The power liftgate system will be disabled.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* You issue a scan tool CLEAR DTCs command.
Diagnostic Aids
* Whenever the LGM is disconnected or loses power, the ignition must be cycled OFF then ON.
* Inspect the optical sensor for proper and secure installation in relation to the liftgate motor.
Reference Information
Schematic Reference
Liftgate Schematics (Liftgate Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Liftgate Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning)
Circuit/System Testing
1. Ignition OFF, disconnect the X3 harness connector at the LGM.
2. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 8 and ground.
• If not within the specified range, replace the LGM.
3. Test for continuity between the voltage reference terminal 8 and low reference terminal 11.
• If continuity is not found, test the voltage reference circuit terminal 8 and low reference circuit terminal 11 for an open/high resistance. If all circuits test normal, replace the liftgate motor assembly.
4. Test for continuity between the voltage reference circuit terminal 8 and ground.
• If continuity is found, test the voltage reference circuit terminal 8 for a short to ground. If the circuit tests normal, replace the liftgate motor assembly.
5. Test for continuity between the voltage reference circuit terminal 8 and position sensor signal 1 terminal 9.
• If continuity is not found, test the position sensor signal 1 circuit terminal 9 for an open/high resistance. If all circuits test normal, replace the liftgate motor assembly.
6. Test for continuity between the position sensor signal 1 circuit terminal 9 and ground.
• If continuity is found, test the position sensor signal 1 circuit terminal 9 for a short to ground. If the circuit tests normal, replace the liftgate motor assembly.
7. Test for continuity between the voltage reference circuit terminal 8 and position sensor signal 2 circuit terminal 10.
• If continuity is not found, test the position sensor signal 2 circuit terminal 10 for an open/high resistance. If all circuits test normal, replace the liftgate motor assembly.
8. Test for continuity between the position sensor signal 2 circuit terminal 10 and ground.
• If continuity is found, test the position sensor signal 2 circuit terminal 10 for a short to ground. If the circuit tests normal, replace the liftgate motor assembly.
9. If all circuits test normal, replace the LGM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Liftgate Close Actuator Motor Replacement (Service and Repair)
* Control Module References (Programming and Relearning)for LGM replacement, setup, and programming