B1942 - Power Liftgate Position Sensor 2 Circuit Performance: Notes
For a complete wiring diagram, refer to appropriate Wiring Diagram
Theory of Operation
The power liftgate position sensor is located inside the power drive unit. It provides two signals which informs the module of the true position of the liftgate. These signals (sensors 1 and 2) can be read on the scan tool and are displayed as True and False. The sensors are supplied 5 volts from the power liftgate module. As the liftgate is in motion, the sensors will toggle between 5.0 volts and 0.02 volts.
- >>When Monitored:<< Whenever the power liftgate is power opening or closing.
- >>Set Condition:<< When the power liftgate module senses the position sensor signal 2 circuit not pulsing during motor operation, this code will set.
| Possible Causes |
|---|
| Q901 LOGIC GROUND OPEN |
| Q205 POSITION SENSOR SIGNAL 2 CIRCUIT SHORT TO GROUND |
| Q205 POSITION SENSOR SIGNAL 2 CIRCUIT OPEN |
| Q205 POSITION SENSOR SIGNAL 2 CIRCUIT SHORT TO VOLTAGE |
| Q203 POSITION SENSOR SUPPLY CIRCUIT OPEN |
| Q203 POSITION SENSOR SUPPLY CIRCUIT SHORT TO GROUND |
| Q205 POSITION SENSOR SIGNAL 2 CIRCUIT SHORT to Q204 POSITION SENSOR SIGNAL 1 CIRCUIT |
| POWER LIFTGATE DRIVE UNIT |
| POWER LIFTGATE MODULE |
Test Step 1 - DTC Present
- With the scan tool, record DTCs.
- Erase DTCs.
- Turn the ignition OFF, wait 10 seconds, then turn the ignition ON.
- If possible, operate the liftgate several times.
- With the scan tool, check for DTCs.
Does the scan tool display B1942 - Power Liftgate Position Sensor 2 Circuit Performance?
Yes
- Go to Test Step 2 Test Step 2 - Logic Ground Open
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform the Body Verification Test. Refer to BODY VERIFICATION TEST .