Pinpoint Test D : DTCS P0A90:11, P0A90:13, P0A90:19 And P170E:92: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Wiring Diagram Four Wheel Drive Systems for schematic and connector information.
Normal Operation and Fault Conditions
The eLSD hydraulic pump motor provides hydraulic oil pressure to actuate the plenum and provide locking torque across the rear wheels. A circuit fault in the pump motor system results in a DTC being set.
Hydraulic Control Unit Electrical Connectors
| 1. | Hydraulic pump motor |
|---|---|
| 2. | Accumulator pressure sensor |
| 3. | Oil Temperature/pressure sensor |
| 4. | Pressure control valve |
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0A90:11 | Drive Motor "A" Performance: Circuit Short To Ground | This DTC sets in the DCMR if the pump motor output remains shorted across five retry attempts. |
| P0A90:13 | Drive Motor "A" Performance: Circuit Open | This DTC occurs when DCMR detects a open circuit signal. |
| P0A90:19 | Drive Motor "A" Performance: Circuit Current Above Threshold | This DTC occurs when DCMR detects a high current. |
| P170E:92 | Clutch Delivered Torque Performance | This DTC sets when the DCMR detects degradation in range system performance. |
Possible Sources
- Wiring, terminals or connectors
- Hydraulic pump motor (Part of HCU)
- DCMR