Pinpoint Test D : DTCS P0A90:11, P0A90:13, P0A90:19 And P170E:92

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.

D1 CHECK FOR DCMR DTCS

Enter the following diagnostic mode: DCMR Self-Test.

Is DTCs P0A90:11 or P0A90:13 or P0A90:19 or P170E:92 recorded?

Yes	For DTC P0A90:11, GO to D3For DTC P0A90:13, GO to D5For DTC P0A90:19, GO to D7For DTC P170E:92, GO to D2

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

D2 CHECK THE OIL PUMP MOTOR FOR DTCS

Ignition ON.

Connect the diagnostic tool.

Using a diagnostic scan tool, CLEAR the DTCs.

RUN the eLSD service routine. TEST drive the vehicle until it reaches operating temperature and make lane changes, left, and right turns.

PERFORM DCMR self-test.

Is DTCs P170E:92 recorded?

Yes

GO to D3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

D3 CHECK THE OIL PUMP MOTOR CIRCUIT FOR AN INTERNAL SHORT

Ignition OFF.

Disconnect Differential oil pump motor C3830 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
Hydraulic pump motor, pin 1, component side	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to D4

No	INSTALL a new HCU. REFER to: Hydraulic Control Unit (HCU) .

D4 CHECK THE HYDRAULIC PUMP MOTOR CIRCUIT FOR SHORT TO GROUND

Disconnect DCMR C3396 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3830-1	Courtesy of FORD MOTOR COMPANY	Ground
C3830-2	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes	Using a diagnostic scan tool, PERFORM the eLSD service routine.

No	REPAIR the circuit in question. CLEAR the DTCs.

D5 CHECK THE DIFFERENTIAL PUMP MOTOR FOR AN OPEN

Ignition OFF.

Disconnect Hydraulic Pump Motor C3830 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
Hydraulic pump motor, component side, pin 1	Courtesy of FORD MOTOR COMPANY	Hydraulic pump motor, component side, pin 2

Is the resistance greater than 10 ohms?

Yes	INSTALL a new eLSD HCU. REFER to: Hydraulic Control Unit (HCU) .

GO to D6

D6 CHECK THE HYDRAULIC PUMP MOTOR CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Hydraulic pump motor C3830 .

Disconnect DCMR C3396 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3396-3	Courtesy of FORD MOTOR COMPANY	C3830-2
C3396-4	Courtesy of FORD MOTOR COMPANY	C3830-1

Is the resistance less than 3 ohms?

Yes	Using a diagnostic scan tool, PERFORM the eLSD service routine.

No	REPAIR the circuit. CLEAR the DTCs.

D7 CHECK THE HYDRAULIC PUMP MOTOR CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Disconnect Hydraulic pump motor C3830 .

Disconnect DCMR C3396 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3396-3	Courtesy of FORD MOTOR COMPANY	C3396-4

Is the resistances greater than 10, 000 ohms?

Yes

GO to D8

No	REPAIR the circuit. CLEAR the DTCs.

D8 CHECK THE HYDRAULIC PUMP MOTOR CIRCUIT FOR SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3396-4	Courtesy of FORD MOTOR COMPANY	Ground
C3396-3	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to D9

No	REPAIR the circuit in question. CLEAR the DTCs.

D9 CHECK FOR CORRECT DCMR (DIFFERENTIAL CONTROL MODULE REAR) OPERATION

Disconnect and inspect all DCMR connectors.

Disconnect and inspect all eLSD HCU connectors.

Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect all the DCMR connectors and make sure they seat and latch correctly.

Reconnect all the eLSD HCU connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new DCMR. REFER to: Differential Control Module Rear (DCMR) .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.