Pinpoint Test A : Transmission Control Solenoids

WARNING: This page is about a different car, the 2019 Ford F-350 Super Duty and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Power is routed through the transmission solenoid power control relay (inside the PCM) to all transmission solenoids. If the power circuit to the transmission solenoids or the transmission solenoid power control relay fails open, all solenoids are failed electrically off. Check for open, short to ground or the transmission connector disconnected. The transmission solenoid power control relay disables power to the transmission solenoids when certain transmission DTCs are set.

Carry out KOEO and KOER procedures.
Retrieve and record all DTCs.
Repair all non-transmission DTCs first.
Repair all transmission DTCs second.
Clear all CMDTCs and attempt to repeat them.
Repair all CMDTCs.
If only pass codes are obtained, REFER to: Diagnosis By Symptom .

Transmission Controls - 6R100 for schematic and connector information.

Normal Operation and Fault Conditions

The transmission solenoid power control relay inside the PCM provides power to shift solenoids A, B, C, D and E, as well as to the TCC and LPC solenoids. Each solenoid is controlled by a low-side driver inside the PCM. If the power circuit to the transmission solenoids or the transmission solenoid power control relay fails open, all solenoids are failed electrically off. Check for open, short to ground or the transmission connector disconnected. The transmission solenoid power control relay disables power to the transmission solenoids when certain transmission DTCs are set.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0657:00	Actuator Supply Voltage "A" Circuit/Open: No Sub Type Information	This DTC indicates an open circuit in the transmission solenoid power control (TSPC) circuit.
PCM P0740:00	Torque Converter Clutch Solenoid Circuit/Open: No Sub Type Information	This DTC indicates an open circuit in the TCC solenoid circuit. An open circuit causes the TCC solenoid to be failed to low current (minimum pressure since the TCC solenoid is directly proportional), so the TCC is failed off.
PCM P0742:00	Torque Converter Clutch Solenoid Circuit Stuck On: No Sub Type Information	This DTC indicates a short to ground in the TCC solenoid circuit. The TCC is failed on until the DTC is stored, then the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0743:00	Torque Converter Clutch Solenoid Circuit Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0740, P0742 and/or P0744. Service the more specific DTC first.
PCM P0744:00	Torque Converter Clutch Solenoid Circuit Intermittent: No Sub Type Information	This DTC indicates a short to power in the TCC solenoid circuit. A short to power causes the TCC solenoid to be failed to low current (minimum pressure since the TCC solenoid is directly proportional), so the TCC is failed off.
PCM P0748:00	Pressure Control Solenoid "A" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0960, P0962, P0963. Service the more specific DTCs first.
PCM P0750:00	Shift Solenoid "A": No Sub Type Information	This DTC indicates an open circuit in the SSA circuit. An open circuit causes SSA to be failed to low current (minimum pressure since SSA is directly proportional), so the forward clutch is failed off.
PCM P0753:00	Shift Solenoid "A" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0750, P0973 and/or P0974. Service the more specific DTC first.
PCM P0754:00	Shift Solenoid "A" Intermittent: No Sub Type Information	The PCM detected a SSA fault, but the fault did not last long enough for the PCM to set a more specific SSADTC. Inspect SSA wiring and connectors for damage.
PCM P0755:00	Shift Solenoid "B": No Sub Type Information	This DTC indicates an open circuit in the SSB circuit. An open circuit causes SSB to be failed to low current (minimum pressure since SSB is directly proportional), so the direct clutch is failed off.
PCM P0758:00	Shift Solenoid "B" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0755, P0976 and/or P0977. Service the more specific DTC first.
PCM P0759:00	Shift Solenoid "B" Intermittent: No Sub Type Information	The PCM detected a SSB fault, but the fault did not last long enough for the PCM to set a more specific SSBDTC. Inspect SSB wiring and connectors for damage.
PCM P0760:00	Shift Solenoid "C": No Sub Type Information	This DTC indicates an open circuit in the SSC circuit. An open circuit causes SSC to be failed to low current (minimum pressure since SSC is directly proportional), so the intermediate clutch is failed off.
PCM P0763:00	Shift Solenoid "C" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0760, P0979 and/or P0980. Service the more specific DTC first.
PCM P0764:00	Shift Solenoid "C" Intermittent: No Sub Type Information	The PCM detected a SSC fault, but the fault did not last long enough for the PCM to set a more specific SSCDTC. Inspect SSC wiring and connectors for damage.
PCM P0765:00	Shift Solenoid "D": No Sub Type Information	This DTC indicates an open circuit in the SSD circuit. An open circuit causes SSD to be failed to low current (maximum pressure since SSD is inversely proportional), so the low/reverse clutch is failed on.
PCM P0768:00	Shift Solenoid "D" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0765, P0982 and/or P0983. Service the more specific DTC first.
PCM P0769:00	Shift Solenoid "D" Intermittent: No Sub Type Information	The PCM detected a SSD fault, but the fault did not last long enough for the PCM to set a more specific SSDDTC. Inspect SSD wiring and connectors for damage.
PCM P0770:00	Shift Solenoid "E": No Sub Type Information	This DTC indicates an open circuit in the SSE circuit. An open circuit causes SSE to be failed to low current (minimum pressure since SSE is normally closed), so the overdrive clutch is failed off.
PCM P0773:00	Shift Solenoid "E" Electrical: No Sub Type Information	This DTC illuminates the wrench light in conjunction with P0770, P0985 and/or P0986. Service the more specific DTC first.
PCM P0774:00	Shift Solenoid "E" Intermittent: No Sub Type Information	The PCM detected a SSE fault, but the fault did not last long enough for the PCM to set a more specific SSEDTC. Inspect SSE wiring and connectors for damage.
PCM P0960:00	Pressure Control Solenoid "A" Control Circuit/Open: No Sub Type Information	This DTC indicates an open circuit in the LPC solenoid circuit. An open circuit causes the LPC solenoid to be failed to low current, which results in maximum line pressure since the LPC solenoid is inversely proportional.
PCM P0961:00	Pressure Control Solenoid "A" Control Circuit Range/Performance: No Sub Type Information	The PCM detected a LPC solenoid fault resulting in a transmission neutral condition, but the fault did not last long enough for the PCM to set a more specific LPC solenoid DTC. Inspect LPC solenoid wiring and connectors for damage.
PCM P0962:00	Pressure Control Solenoid "A" Control Circuit Low: No Sub Type Information	The PCM detected a short to ground in the LPC solenoid electrical. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0963:00	Pressure Control Solenoid "A" Control Circuit High: No Sub Type Information	The PCM detected a short to power in the LPC solenoid electrical. A short to power causes the LPC solenoid to be failed to low current, which results in maximum line pressure since the LPC solenoid is inversely proportional.
PCM P0973:00	Shift Solenoid "A" Control Circuit Low: No Sub Type Information	This DTC indicates a short to ground in the SSA circuit. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0974:00	Shift Solenoid "A" Control Circuit High: No Sub Type Information	This DTC indicates a short to power in the SSA circuit. A short to power causes SSA to be failed to low current (minimum pressure since SSA is directly proportional), so the forward clutch is failed off.
PCM P0976:00	Shift Solenoid "B" Control Circuit Low: No Sub Type Information	This DTC indicates a short to ground in the SSB circuit. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0977:00	Shift Solenoid "B" Control Circuit High: No Sub Type Information	This DTC indicates a short to power in the SSB circuit. A short to power causes SSB to be failed to low current (maximum pressure since SSB is inversely proportional), so the direct clutch is failed on.
PCM P0979:00	Shift Solenoid "C" Control Circuit Low: No Sub Type Information	This DTC indicates a short to ground in the SSC circuit. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0980:00	Shift Solenoid "C" Control Circuit High: No Sub Type Information	This DTC indicates a short to power in the SSC circuit. A short to power causes SSC to be failed to low current (minimum pressure since SSC is directly proportional), so the intermediate clutch is failed off.
PCM P0982:00	Shift Solenoid "D" Control Circuit Low: No Sub Type Information	This DTC indicates a short to ground in the SSD circuit. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0983:00	Shift Solenoid "D" Control Circuit High: No Sub Type Information	This DTC indicates a short to power in the SSD circuit. A short to power causes SSD to be failed to low current (maximum pressure since SSD is inversely proportional), so the low/reverse clutch is failed on.
PCM P0984:00	Shift Solenoid "E" Control Circuit Range/Performance: No Sub Type Information	This DTC indicates the PCM detected a SSE fault, but the fault did not last long enough for the PCM to set a more specific SSEDTC. Inspect SSE wiring and connectors for damage.
PCM P0985:00	Shift Solenoid "E" Control Circuit Low: No Sub Type Information	This DTC indicates a short to ground in the SSE circuit. Once the DTC is stored, the failsafe logic opens the high side switch which disables all gears except park, reverse, neutral, and 5M.
PCM P0986:00	Shift Solenoid "E" Control Circuit High: No Sub Type Information	This DTC indicates a short to power in the SSE circuit. A short to power causes SSE to be failed to low current (minimum pressure since SSE is normally closed), so the overdrive clutch is failed off.
PCM P2760:00	Torque Converter Clutch Pressure Control Solenoid Intermittent: No Sub Type Information	The PCM detected a TCC solenoid fault, but the fault did not last long enough for the PCM to set a more specific TCC solenoid DTC. Inspect TCC solenoid wiring and connectors for damage.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires or ground and missing or damaged seals
Main control valve body molded leadframe
Solenoid
PCM

A1 CHECK THE TRANSMISSION SOLENOID POWER CONTROL (TSPC) CIRCUIT FOR VOLTAGE

NOTE: This pinpoint test is written to address all transmission solenoid electrical faults. For each test step, only the circuits related to the DTC retrieved during the KOEO test need to be tested.

Ignition OFF.

Disconnect: C1575.

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

NOTE: The PCM removes power from the Transmission Solenoid Power Control (TSPC) circuit when certain electrical faults are present. Use a meter with a min/max feature and/or recording capabilities. Make sure all test connections are made at the transmission harness connector before the ignition is turned ON to obtain a reading before the PCM removes power.

Connect the meter leads to C1575-7 and ground.

Enable the min/max or recording feature on the meter.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-7	Courtesy of FORD MOTOR COMPANY	Ground

Is the maximum recorded voltage greater than 11 volts?

Yes

GO to A4

GO to A2

A2 CHECK THE TRANSMISSION SOLENOID POWER CONTROL (TSPC) CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect PCM C175E.

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

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-7	Courtesy of FORD MOTOR COMPANY	Refer to C175E-91

Is the resistance less than 3 ohms?

Yes

GO to A3

No	REPAIR the circuit.

A3 CHECK THE TRANSMISSION SOLENOID POWER CONTROL (TSPC) CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1575-7	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes	Refer to PCM GUIDED ROUTINE TESTING After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download .

No	REPAIR the circuit.

A4 CHECK THE SOLENOID CONTROL CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect PCM C175E.

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

Measure the resistance of the suspect solenoid control circuit using the following chart:

Positive Lead	Measurement / Action	Negative Lead
SSA C1575-9	Courtesy of FORD MOTOR COMPANY	Refer to C175E-75
SSB C1575-14	Courtesy of FORD MOTOR COMPANY	Refer to C175E-74
SSC C1575-13	Courtesy of FORD MOTOR COMPANY	Refer to C175E-73
SSD C1575-10	Courtesy of FORD MOTOR COMPANY	Refer to C175E-72
SSE C1575-8	Courtesy of FORD MOTOR COMPANY	Refer to C175E-77
LPC Solenoid C1575-16	Courtesy of FORD MOTOR COMPANY	Refer to C175E-15
TCC Solenoid C1575-3	Courtesy of FORD MOTOR COMPANY	Refer to C175E-14

Is the resistance less than 3 ohms on the suspect circuit?

Yes

GO to A5

No	REPAIR the circuit.

A5 CHECK THE SOLENOID CONTROL CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between the transmission vehicle harness C1575, harness side and ground using the following chart:

Positive Lead	Measurement / Action	Negative Lead
SSA C1575-9	Courtesy of FORD MOTOR COMPANY	Ground
SSB C1575-14	Courtesy of FORD MOTOR COMPANY	Ground
SSC C1575-13	Courtesy of FORD MOTOR COMPANY	Ground
SSD C1575-10	Courtesy of FORD MOTOR COMPANY	Ground
SSE C1575-8	Courtesy of FORD MOTOR COMPANY	Ground
LPC Solenoid C1575-16	Courtesy of FORD MOTOR COMPANY	Ground
TCC Solenoid C1575-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms on the suspect circuit?

Yes

GO to A6

No	REPAIR the circuit.

A6 CHECK THE SOLENOID CONTROL CIRCUITS FOR A SHORT TO POWER

Ignition ON.

Measure the voltage between the transmission vehicle harness C1575, harness side and ground using the following chart:

Positive Lead	Measurement / Action	Negative Lead
SSA C1575-9	Courtesy of FORD MOTOR COMPANY	Ground
SSB C1575-14	Courtesy of FORD MOTOR COMPANY	Ground
SSC C1575-13	Courtesy of FORD MOTOR COMPANY	Ground
SSD C1575-10	Courtesy of FORD MOTOR COMPANY	Ground
SSE C1575-8	Courtesy of FORD MOTOR COMPANY	Ground
LPC Solenoid C1575-16	Courtesy of FORD MOTOR COMPANY	Ground
TCC Solenoid C1575-3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage detected on the suspect circuit?

Yes	REPAIR the circuit.

GO to A7

A7 CHECK FOR FLUID CONTAMINATION

Ignition OFF.

REMOVE the transmission fluid pan. REFER to: Transmission Fluid Pan, Gasket and Filter .

Inspect for fine metallic contamination at the molded leadframe to solenoid connections.

Is visible metallic contamination present?

Yes	REMOVE and discard the foam strip if equipped. REMOVE and CLEAN the molded lead frame and solenoid terminals with clean transmission fluid. REFER to: Shift Solenoids (SS) . GO to A8

GO to A8

A8 CHECK THE MOLDED LEADFRAME RESISTANCE

Measure resistance of the suspect solenoid circuit between the transmission harness connector C1575 (component side), and the transmission molded leadframe using the table below:

Positive Lead	Measurement / Action	Negative Lead
Transmission Harness Component Side (see table below)	Courtesy of FORD MOTOR COMPANY	Lead Frame

Transmission	Solenoid	Solenoid Terminal
Refer to C1575-9	SSA	9
Refer to C1575-14	SSB	14
Refer to C1575-13	SSC	13
Refer to C1575-10	SSD	10
Refer to C1575-8	SSE	8
Refer to C1575-16	LPC solenoid	16
Refer to C1575-3	TCC solenoid	3

Is the resistance less than 3 ohms on the suspect circuit?

Yes	INSTALL a new solenoid. INSTALL new foam strip (Service Part Number FL3Z-14B167-A) between molded leadframe and the solenoids. REFER to: Shift Solenoids (SS) .

No	INSTALL a new molded leadframe. INSTALL new foam strip (Service Part Number FL3Z-14B167-A) between molded leadframe and the solenoids. REFER to: Shift Solenoids (SS) .