Pinpoint Test E : DTCS P0770, P0773, P0774

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Refer to TRANSMISSION CONTROLS for schematic and connector information.

Normal Operation and Fault Conditions

The SSE controls the multiplexing of the CBR1/C456 circuit between the low/reverse and overdrive clutches. SSC is a normally closed ON/OFF solenoid. The PCM monitors voltage on the SSE solenoid control circuit. If the actual voltage does not match the desired voltage, the PCM sets an electrical fault DTC.

Courtesy of FORD MOTOR COMPANY

1. LPC solenoid (normally high)
2. SSC (normally low)
3. TCC solenoid (normally low)
4. SSE (normally closed [OFF])
5. SSA (normally low)
6. SSB (normally high)
7. SSD (normally high)

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0770:00	Shift Solenoid "E": No Sub Type Information	Open, short to power or short to ground in the solenoid or wire harness.
PCM P0773:00	Shift Solenoid "E" Electrical: No Sub Type Information	Open or short to ground in the solenoid or wire harness.
PCM P0774:00	Shift Solenoid "E" Intermittent: No Sub Type Information	Intermittent circuit in the solenoid or wire harness open, shorted to ground or shorted to power.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
SSE
Transmission internal wiring harness frame
PCM

E1 RETRIEVE AND RECORD ALL DTCS
- Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).
Are diagnostic trouble codes (DTCs) P0770, P0773 and/or P0774 present?

Yes GO to E2

No REFER to: Diagnosis By Symptom .

E2 CHECK THE SHIFT SOLENOID E (SSE) CONTROL CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect Transmission Vehicle Harness C1520.

Disconnect PCM C1915E.

Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1520-7	Courtesy of FORD MOTOR COMPANY	C1915E-86

Is the resistance less than 3 ohms?

Yes

GO to E3

No	REPAIR the circuit.

E3 CHECK THE SHIFT SOLENOID E (SSE) CONTROL CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1520-7	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to E4

No	REPAIR the circuit.

E4 CHECK THE SHIFT SOLENOID E (SSE) CONTROL CIRCUIT FOR A SHORT TO POWER

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1520-7	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to E5

E5 CHECK THE SHIFT SOLENOID E (SSE) FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Component side resistance pin 7.	Courtesy of FORD MOTOR COMPANY	Component side resistance pin 5.

Is the resistance between 17.67 and 19.53 ohms?

Yes	Refer to PCM GUIDED ROUTINE TESTING CARRY OUT the Transmission Strategy Download, REFER to: Transmission Strategy Download

GO to E6

E6 CHECK SHIFT SOLENOID E (SSE) RESISTANCE

Remove the transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame . Inspect for metal shavings on the exposed metal contacts or other components and clean the solenoid and transmission internal wiring harness frame terminals.

Measure:

Positive Lead	Measurement / Action	Negative Lead
SSE pin A.	Courtesy of FORD MOTOR COMPANY	SSE pin B.

Is the resistance between 17.67 and 19.53 ohms?

Yes

GO to E7

No	INSTALL a new SSE. REFER to: Solenoid .

E7 CHECK SHIFT SOLENOID E (SSE) FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
SSE pin A.	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes	INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame .

No	INSTALL a new SSE. REFER to: Solenoid .