Pinpoint Test AK: P0DA8

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 P0DA8:00	Hybrid/EV Battery Voltage/Drive Motor 'A' Inverter Voltage Correlation: No Sub Type Information	This DTC sets when a high voltage cable issue or an internal module issue is detected.

Possible Causes

150 amp high voltage high current fuse
Loose high voltage cables
BECM

AK1 CARRY OUT A BECM (BATTERY ENERGY CONTROL MODULE) SELF-TEST
- Ignition ON.
- CARRY out the BECM self-test.
Are DTC s P0ADB:00, P0ADC:00, P0AA2:00, P0ADF:00, P0AE0:00, P0AA5:00 or U3012:00 present?

Yes DIAGNOSE and REPAIR any BECMDTC s. REFER to: DIAGNOSTIC TROUBLE CODE (DTC) CHART .

No GO to AK2

AK2 CHECK THE HIGH VOLTAGE POSITIVE CABLE FOR AN OPEN

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

Ignition OFF.

Disconnect High Voltage BJB For HEV C4236D, For PHEV C494.

Inspect the connector for damaged or pushed-out pins.

Disconnect Inverter System Controller (ISC) C199C.

Inspect the connector for damaged or pushed-out pins.

For HEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C4236D Pin 4	Courtesy of FORD MOTOR COMPANY	C199C Pin 4

For PHEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494 Pin 4	Courtesy of FORD MOTOR COMPANY	C199C Pin 4

Is the resistance less than 5 ohms?

Yes

GO to AK3

No	INSTALL a new High Voltage Cable from the Inverter System Controller (ISC) to the traction battery. REFER to: HIGH VOLTAGE BATTERY CABLES - PLUG-IN HYBRID ELECTRIC VEHICLE (PHEV) . CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

AK3 CHECK THE HIGH VOLTAGE NEGATIVE CABLE FOR AN OPEN

for HEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C4236D Pin 3	Courtesy of FORD MOTOR COMPANY	C199C Pin 1

for PHEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494 Pin 1	Courtesy of FORD MOTOR COMPANY	C199C Pin 1

Is the resistance less than 5 ohms?

Yes

GO to AK4

No	INSTALL a new High Voltage Cable from the Inverter System Controller (ISC) to the traction battery. REFER to: HIGH VOLTAGE BATTERY CABLES - PLUG-IN HYBRID ELECTRIC VEHICLE (PHEV) . CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

AK4 CHECK THE HIGH VOLTAGE CABLES FOR A SHORT FROM POSTIVE TO NEGATIVE

Ignition OFF.

For HEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C4236D Pin 3	Courtesy of FORD MOTOR COMPANY	C4236D Pin 4

For PHEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494 Pin 1	Courtesy of FORD MOTOR COMPANY	C494 Pin 4

Is the resistance below 10K ohms?

Yes	With the aid of the wiring diagram, REPAIR the short circuit. CLEAR the Inverter System Controller (ISC) DTC s and REPEAT the self-test.

GO to AK5

AK5 VISUAL INSPECTION OF THE HIGH VOLTAGE SYSTEM

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 AK6

AK6 HIGH VOLTAGE FUSE TEST

Ignition OFF.

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

Disconnect For PHEV only, C495.

Inspect connector for damaged or pushed-out pins.

For HEV use this image as reference when performing the following test.

Connector C4236D component side

Courtesy of FORD MOTOR COMPANY

For HEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C4236D-4 (component side)	Courtesy of FORD MOTOR COMPANY	C4236D-1 (component side)

For PHEV use this image as reference when performing the following test.

Connector C494 component side

Courtesy of FORD MOTOR COMPANY

For PHEV, measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494-1 (component side)	Courtesy of FORD MOTOR COMPANY	C495 Pin 4 (male side)

Is the resistance less than 3 ohms?

Yes

GO to AK8

GO to AK7

AK7 VERIFY THE 150A HIGH VOLTAGE FUSE IS OK

Verify the high voltage high current (150A) fuse is ok.

Is the 150A fuse good?

Yes	REPAIR circuit.

REFER to: High Voltage High Current Fuse - Plug-In Hybrid Electric Vehicle (PHEV) . or REFER to: High Voltage High Current Fuse - Plug-In Hybrid Electric Vehicle (PHEV) .
If OK, REPAIR circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit resistance. INSTALL new high voltage cables from the Inverter System Controller (ISC) to the traction battery, if necessary. REFER to: HIGH VOLTAGE BATTERY CABLES - PLUG-IN HYBRID ELECTRIC VEHICLE (PHEV) .

AK8 VERIFY THAT THE CONCERN IS PRESENT

NOTE: Clearing the Inverter System Controller (ISC) Diagnostic Trouble Codes (DTCs) will erase any Inverter System Controller (ISC) recorded freeze frame data. Make sure to record any Inverter System Controller (ISC) freeze frame information before proceeding any further. Refer to the scan tool instruction manual for freeze frame Parameter Identification (PID) menu.
- INSTALL the Inverter System Controller (ISC) side cover. REFER to: Inverter System Controller [SOBDMC] .
- For HEV, inspect the High Voltage Battery Junction Box C4236D and Inverter System Controller (ISC) C199C connectors for damaged or pushed-out pins.
- For PHEV, inspect Inverter System Controller (ISC) C199C,C494 and C495 connectors for damaged or pushed-out pins.
- Repair:
  - corrosion, damaged or bent pins, and/or pushed-out pins - replace the high voltage harness between the Inverter System Controller (ISC) and battery REFER to: HIGH VOLTAGE BATTERY CABLES - PLUG-IN HYBRID ELECTRIC VEHICLE (PHEV) .
- Connect Inverter System Controller (ISC) C199C.
- Connect For HEV, High Voltage Battery Junction Box C4236D.
- Connect For PHEV C494.
- Connect For PHEV C495.
- Verify the connectors seat and latch correctly.
- Repower the high voltage system. REFER to: High Voltage System De-energizing .
- Ignition ON.
- Clear the Inverter System Controller (ISC) DTC s.
- Carry out the Inverter System Controller (ISC) self-test.
Is DTC P0DA8 present?

Yes INSTALL a new BECM. REFER to: Battery Energy Control Module (BECM) - Plug-In Hybrid Electric Vehicle (PHEV) .

No GO to AK9

AK9 CHECK THE HIGH VOLTAGE CABLES FOR AN INTERMITTENT CONCERN

Ignition ON.

Access the SOBDMC and monitor the GEN_INV_V (V) PID

Carefully wiggle all accessible wiring and connectors associated with the High Voltage Cable from the Inverter System Controller (ISC) to the Traction Battery, and look for a change in the PID state.

Does the voltage vary by more than 10 volts during the wiggle test or by more than 30 volts during the drive cycle test?

Yes	REPLACE the high voltage harness between the Inverter System Controller (ISC) and battery REFER to: HIGH VOLTAGE BATTERY CABLES - PLUG-IN HYBRID ELECTRIC VEHICLE (PHEV) .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.