B1975 - Power Liftgate Latch Cinch Ratchet Secondary Switch Performance: Notes
For a complete wiring diagram, refer to appropriate Wiring Diagram
- >>When Monitored:<< Whenever the power liftgate latch is performing a cinching operation.
- >>Set Condition:<< The ratchet secondary switch is unstable during a cinching operation.
| Possible Causes |
|---|
| BINDING LIFTGATE |
| LOW BATTERY VOLTAGE |
| Q901 LOGIC GROUND CIRCUIT OPEN |
| Q76 LATCH SECONDARY POSITION SENSE CIRCUIT OPEN |
| Q76 LATCH SECONDARY POSITION SENSE CIRCUIT SHORT TO VOLTAGE |
| Q76 LATCH SECONDARY POSITION SENSE CIRCUIT SHORT TO GROUND |
| POWER LIFTGATE LATCH |
| POWER LIFTGATE MODULE |
Theory of Operation
The secondary ratchet switch must remain closed when the liftgate is fully open or between full open and closed positions. The switch will open when the liftgate is fully closed and latched. This switch indicates when the latch is in secondary position. It is open when in secondary or primary and closed when out of secondary.
Insure the battery is fully charged and the vehicle charging system is operating properly before proceeding.
Test Step 1 - DTC Present
This DTC will only set during the cinching operation after the four second time out. This may make it difficult to reproduce.
- With the scan tool, record and erase DTCs.
- Turn the ignition OFF, wait 10 seconds, then turn the ignition ON.
- Operate the power liftgate several times if possible.
- With the scan tool, read active DTCs.
Does the scan tool display B1975 - Power Liftgate Latch Cinch Ratchet Secondary Switch Performance?
Yes
- Go to Test Step 2 B1975 - POWER LIFTGATE LATCH CINCH RATCHET SECONDARY SWITCH PERFORMANCE => Test Step 2 - Binding Liftgate
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the door several times and check for any binding or other obstructions.
- Perform the Body Verification Test. Refer to BODY VERIFICATION TEST .