Pinpoint Test Ca: 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 Causes

Wiring, terminals or connectors
Transmission

CA1 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 DTC s P0A3F or P0C50 set in the Inverter System Controller (ISC)?

Yes For P0A3F, GO to Pinpoint Test BT For P0C50, GO to Pinpoint Test BU

No GO to CA2

CA2 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 CA3

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

CA3 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] .

Courtesy of FORD MOTOR COMPANY

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 12 Nm

Courtesy of FORD MOTOR COMPANY

Is a concern present?

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

GO to CA4

CA4 CHECK FOR MOTOR PHASE CONTINUITY

Use this image as reference when performing the following test.

ISC/SOBDMC, component side

Courtesy of FORD MOTOR COMPANY

Measure and record:

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

Is the resistance less than 5 ohms?

Yes

GO to CA5

No	INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

CA5 CHECK FOR MOTOR PHASE SHORT TO GROUND

Use this image as reference when performing the following test.

ISC/SOBDMC, component side

Courtesy of FORD MOTOR COMPANY

Measure and record:

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

Is the resistance greater than 10K ohms?

Yes

GO to CA6

No	INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

CA6 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 Pin 13	Courtesy of FORD MOTOR COMPANY	C199B Pin 1
C1111 Pin 3	Courtesy of FORD MOTOR COMPANY	C199B Pin 2
C1111 Pin 12	Courtesy of FORD MOTOR COMPANY	C199B Pin 7
C1111 Pin 2	Courtesy of FORD MOTOR COMPANY	C199B Pin 8
C1111 Pin 1	Courtesy of FORD MOTOR COMPANY	C199B Pin 13
C1111 Pin 11	Courtesy of FORD MOTOR COMPANY	C199B Pin 19

Is the resistance less than 3 ohms?

Yes

GO to CA7

No	INSTALL a new harness.

CA7 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) DTC s.

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, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission . CLEAR the Inverter System Controller (ISC) DTC s. 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.