2019 NQH/NPO- Model Year Design Change
Beginning in 2019 model year for NQH/NPO transfer case will be available. Changes include, but not limited to:
- Front output shaft now is an external spline
- Front output NEW seal design and slinger implementation
- Front output shaft boot and clamps.
- Speed sensor has been removed, reluctor wheel removed and replaced with a spacer
- Actuator electronics
IPS is used as a high-resolution sensor to measure motor speed and direction. Sensor outputs are two PWM signals 0 - 5 volts at constant duty cycle. As the motor speed changes, the frequency of the PWM signal will change. Motor direction change is measured by the phase shift between Incremental Sensor Output B and Incremental Sensor Output A.
New 19MY actuator can be identified with label in component. Look for "NQH QUAD" in bottom left corner. If a part number from a previous model year is installed by mistake, the system will not set a DTC until movement is requested. Once there is actuator movement, the TCCM will set run time correlation fault (C15A9 $5A).
- New collector magnet
- RPS gasketNOTE:
Do not install a new gasket until making sure matting surface in housing is clean. It is important to avoid the possibility of a double gasket.
- RPS electronics
New 19MY RPS (position sensor) can be identified with a "S" mark in following location (RPS connector). If a part number from a previous model year is installed by mistake, the system will not set a DTC until movement is requested in the high torque range. In this range, there will be a large enough difference between the RPS and the IPS. The TCCM will then set run time correlation fault (C15A9 $5A).
| PIN | ACTUATOR PIN OUT |
|---|---|
| A | MOTOR POWER INPUT (-V) |
| B | LOCK/BRAKE POWER INPUT (+V) |
| C | LOCK/BRAKE POWER INPUT (-V) |
| D | MOTOR POWER INPUT (+V) |
| E | INCREMENTAL SENSOR OUTPUT B |
| F | INCREMENTAL SENSOR OUTPUT A |
| G | SENSOR POWER INPUT (+V) |
| H | SENSOR POWER INPUT (-V) |
- Shifting to Transfer Case neutral. Transfer Case NEUTRAL position may be obtained only if the following criteria have been met:
- Start the vehicle or turn the ignition on.
- Shift the transmission to NEUTRAL.
- Shift the transfer case to 2 HI. (Shifts to transfer case neutral are only allowed when transfer case initial state is 2 HI.)
- Apply park brake and/or Service brake. If Park Brake and/or service brake is not applied within 20 seconds, transfer case will remain in original state.
- Shifting to 2WD with transmission in Park (P) During this shift, EPB (Electric Parking Brake) will engage. This is normal operation, behavior is described in Owner's Manual.