B153E

Liftgate Angle Sensor Malfunction - DTC B153E

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 Descriptor
DTC B153E 08
- Power Liftgate Angle Sensor - External Signal Invalid

Diagnostic Fault Information





Circuit/System Description

The liftgate control module continuously monitors power liftgate operation and calculates its location and direction of travel using 2 inputs from the liftgate position sensor. One input returns the position of the liftgate relative to the latch along the x-axis and the other returns the position of the liftgate relative to the latch along the y-axis. The liftgate control module then uses these 2 inputs together to calculate its angle relative to the liftgate latch.

Conditions for Running the DTC

The system voltage is 9-16 V.

Conditions for Setting the DTC

The liftgate control module does not detect the angle inputs when the liftgate is in motion.

Action Taken When the DTC Sets

The liftgate will only be operational in the manual mode.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.

Diagnostic Aids

Note: Before testing can be performed, the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (Procedures) for the appropriate procedure.

Whenever the liftgate module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the liftgate module.

Reference Information
Schematic Reference

Liftgate Schematics (Liftgate Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Liftgate Description and Operation (Liftgate)
Electrical Information Reference

* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Circuit Testing (Circuit Testing)
* Wiring Repairs (Wiring Repairs)
* Connector Repairs (Connector Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Liftgate Angle parameter while opening and closing the liftgate. The parameter should vary between 0° and approximately 80° as the liftgate opens and closes.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B164 liftgate position sensor.
2. Test for less than 10 ohm between the low reference circuit terminal E and ground.

• If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K39 liftgate control module.

3. Ignition ON, verify that a test lamp illuminates between the 12V reference circuit terminal A and ground.

• If the test lamp does not illuminate, test the 12V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K39 liftgate control module.

4. Ignition OFF, disconnect the X3 harness connector at the K39 liftgate control module.
5. Test for infinite resistance between the sensor signal circuit terminal listed below and ground.

* Sensor 1 signal circuit terminal 9
* Sensor 2 signal circuit terminal 10

• If not the specified value, test the signal circuit for a short to ground.

6. Test for less than 1ohm between the signal circuit terminals listed below:

* Signal circuit terminal C at the B164 liftgate position sensor and the signal circuit terminal 9 at the K39 liftgate control module
* Signal circuit terminal D at the B164 liftgate position sensor and the signal circuit terminal 10 at the K39 liftgate control module.

• If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance.

7. If all circuits test normal, test or replace the B164 liftgate position sensor.

Repair Instructions

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

* Liftgate Angle Sensor Replacement (Liftgate Angle Sensor Replacement)
* Control Module References (Programming and Relearning) for liftgate control module replacement, setup and programming