Pinpoint Test Cg : P0C00

NOTE: The Inverter System Controller (ISC) is referred to as the SOBDMC (Secondary On-Board Diagnostic Control Module C) in the scan tool.

Normal Operation and Fault Conditions

REFER to: Electric Powertrain Control - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
SOBDMC P0C00:00	Drive Motor "A" Current Low: No Sub Type Information	This DTC sets when the 3 phase motor current is not within the expected range or when the resolver circuitry is incorrectly wired.

Possible Sources

Wiring, terminals or connectors
Transmission assembly

CG1 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, run the Inverter System Controller (ISC) self-test.
Are DTCs P0A3F or P0C50 set in the Inverter System Controller (ISC)?

Yes GO to Pinpoint Test CA

No GO to CG2

CG2 CHECK THE INVERTER SYSTEM CONTROLLER (ISC) CALIBRATION LEVEL
- Verify the Inverter System Controller (ISC) is at the latest calibration level.
Is the Inverter System Controller (ISC) at the latest calibration level?

Yes GO to CG3

No UPDATE the Inverter System Controller (ISC) to the latest calibration level.

CG3 VISUAL INSPECTION OF THE HIGH VOLTAGE SYSTEM
- Ignition OFF.
- Depower the high voltage system. REFER to: High Voltage System De-energizing .
- Remove the Inverter System Controller (ISC) side cover. When removing side cover, pull cover straight out approximately 2 inches before moving upwards or damage to the high voltage interlock connector may occur. REFER to: Inverter System Controller [SOBDMC] .
- Examine all the high voltage connections for damage and loose or broken conditions.
- Verify the high voltage terminal bolts are fully seated and torqued to 8 lb.ft (10.5 Nm)
Is a concern present?

Yes REPAIR as necessary. CLEAR the Inverter System Controller (ISC) DTCs and REPEAT the self-test.

No GO to CG4

CG4 CHECK FOR MOTOR PHASE CONTINUITY

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 3, component side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 4, component side
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 3, component side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 5, component side
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 4, component side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 5, component side

Is the resistance less than 5 ohms?

Yes

GO to CG5

No	INSTALL a new Transmission. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

CG5 CHECK FOR MOTOR PHASE SHORT TO GROUND

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 3, component side	Courtesy of FORD MOTOR COMPANY	Ground
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 4, component side	Courtesy of FORD MOTOR COMPANY	Ground
Courtesy of FORD MOTOR COMPANY ISC/SOBDMC pin 5, component side	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10K ohms?

Yes

GO to CG6

No	INSTALL a new Transmission. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

CG6 CHECK THE MOTOR RESOLVER HARNESS CIRCUITS FOR AN OPEN

Disconnect HF 45 Transmission C1111.

Disconnect Inverter System Controller (ISC) C199B.

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
C1111-13	Courtesy of FORD MOTOR COMPANY	C199B-1
C1111-3	Courtesy of FORD MOTOR COMPANY	C199B-2
C1111-12	Courtesy of FORD MOTOR COMPANY	C199B-7
C1111-2	Courtesy of FORD MOTOR COMPANY	C199B-8
C1111-1	Courtesy of FORD MOTOR COMPANY	C199B-13
C1111-11	Courtesy of FORD MOTOR COMPANY	C199B-19

Is the resistance less than 3 ohms?

Yes

GO to CG7

No	With the aid of the wiring diagram REPAIR the open circuit. CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

CG7 CHECK FOR CORRECT INVERTER SYSTEM CONTROLLER (ISC) OPERATION

Ignition OFF.

Disconnect and inspect all Inverter System Controller (ISC) connectors.

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

Reconnect the Inverter System Controller (ISC) connectors. Make sure they seat and latch correctly.

Install the Inverter System Controller (ISC) side cover.

Repower the high voltage system. REFER to: High Voltage System De-energizing .

Ignition ON.

CLEAR the Inverter System Controller (ISC) DTCs.

Ignition OFF.

Wait 5 minutes.

Ignition ON.

Using a diagnostic scan tool, run the Inverter System Controller (ISC) self-test.

Is DTC P0C00 still present?

Yes	INSTALL a new Transmission. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

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.