Liftgate Angle Sensor Malfunction - DTC B153E
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Liftgate Angle Sensor Malfunction - DTC B153E
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DTC B153E 08
Power Liftgate Angle Sensor - External Signal Invalid
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Liftgate Position Sensor 12 V Reference Voltage
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B153E 08
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B153E 08
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B153E 08
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-
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Liftgate Position Sensor 1 Signal
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B153E 08
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B153E 08
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B153E 08
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-
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Liftgate Position Sensor 2 Signal
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B153E 08
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B153E 08
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B153E 08
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-
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Liftgate Position Sensor Low Reference
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-
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B153E 08
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-
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-
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Circuit/System Description
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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.
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Conditions for Running the DTC
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The system voltage is 9-16 V.
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Conditions for Setting the DTC
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The liftgate control module does not detect the angle inputs when the liftgate is in motion.
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Action Taken When the DTC Sets
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The liftgate will only be operational in the manual mode.
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Conditions for Clearing the DTC
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The DTC will be current for as long as the fault is present.
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When the fault is no longer present, the DTC will be a history DTC.
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A history DTC will clear after 50 ignition cycles.
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Whenever the liftgate module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the liftgate module.
Schematic Reference
Liftgate Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Liftgate Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
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Circuit/System Verification
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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.
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1.
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Ignition OFF, disconnect the harness connector at the B164 liftgate position sensor.
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2.
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Test for less than 10 Ω between the low reference circuit terminal E and ground.
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3.
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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.
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4.
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Ignition ON, verify that a test lamp illuminates betweeen the 12V reference circuit terminal A and ground.
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5.
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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.
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6.
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Ignition OFF, disconnect the X3 harness connector at the K39 liftgate control module.
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7.
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Test for infinite resistance between the sensor signal circuit terminal listed below and ground.
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Sensor 1 signal circuit terminal 9
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Sensor 2 signal circuit terminal 10
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8.
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If not the specified value, test the signal circuit for a short to ground.
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9.
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Test for less than 1Ω between the signal circuit terminals listed below:
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Signal circuit terminal C at the B164 liftgate position sensor and the signal circuit terminal 9 at the K39 liftgate control module
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Signal circuit terminal D at the B164 liftgate position sensor and the signal circuit terminal 10 at the K39 liftgate control module.
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10.
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If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance.
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11.
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If all circuits test normal, test or replace the B164 liftgate position sensor.
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Perform the
Diagnostic Repair Verification
after completing the repair.
