Pinpoint Test AU: P0DA8

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions

REFER to: Electric Powertrain Control - Component Location .

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 Sources

275 amp high voltage fuse 203
Loose high voltage cables
BECM

AU1 CARRY OUT A BECM (BATTERY ENERGY CONTROL MODULE) SELF-TEST
- Ignition ON.
- Carry out the BECM self-test.
Are DTCs P0ADB:00, P0ADC:00, P0AA2:00, P0ADF:00, P0AE0:00, P0AA5:00 or U3012:00 present?

Yes DIAGNOSE all BECM DTC's. REFER to: High Voltage Battery, Mounting and Cables .

No GO to AU2

AU2 CHECK THE HIGH VOLTAGE POSITIVE CABLE FOR AN OPEN

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

Ignition OFF.

Disconnect High Voltage BJB C494.

Inspect the connector for damaged or pushed-out pins.

Disconnect Inverter System Controller (ISC) C1458C.

Inspect the connector for damaged or pushed-out pins.

Disconnect DCDC C4630B.

Inspect the connector for damaged or pushed-out pins.

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494-1	Courtesy of FORD MOTOR COMPANY	C1458C-4

Is the resistance less than 5 ohms?

Yes

GO to AU3

No	INSTALL a new high voltage cable from the Inverter System Controller (ISC) to the traction battery. REFER to: High Voltage Battery Cables . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

AU3 CHECK THE HIGH VOLTAGE NEGATIVE CABLE FOR AN OPEN

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
C494-2	Courtesy of FORD MOTOR COMPANY	C1458C-1

Is the resistance less than 5 ohms?

Yes

GO to AU4

No	INSTALL a new high voltage cable from the Inverter System Controller (ISC) to the traction battery. REFER to: High Voltage Battery Cables . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

AU4 CHECK THE HIGH VOLTAGE CABLES FOR A SHORT FROM POSITIVE TO NEGATIVE

Ignition OFF.

Measure and record:

Positive Lead	Measurement / Action	Negative Lead
C4236D-3	Courtesy of FORD MOTOR COMPANY	C4236D-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) DTCs and REPEAT the self-test.

GO to AU5

AU5 VISUAL INSPECTION OF THE HIGH VOLTAGE SYSTEM
- Ignition OFF.
- Visually inspect all the high voltage cables.
- Make sure all the high voltage connectors are correctly and securely connected.
- Examine all the high voltage cables and connectors for damaged, burned or overheated insulation and loose or broken connections.
Is a concern present?

Yes REPAIR as necessary. CLEAR the DTCs and REPEAT the self-test.

No GO to AU6

AU6 HIGH VOLTAGE FUSE TEST

Measure and record:

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

Is the resistance less than 3 ohms?

Yes

GO to AU7

VERIFY the high current fuse box fuse 203 (275A) is OK REFER to: High Voltage High Current Fuse . 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 .

AU7 VERIFY THAT THE CONCERN IS PRESENT

NOTE: Clearing the Inverter System Controller (ISC) Diagnostic Trouble Codes (DTCs) erases any Inverter System Controller (ISC) recorded freeze frame data. 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.

Connect High Voltage BatteryC494.

Inspect the High Voltage Battery Junction Box C1458C connector for damaged or pushed-out pins.

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

Connect Inverter System Controller (ISC) C1458C.

Verify the connectors seat and latch correctly.

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

Ignition ON.

Clear the Inverter System Controller (ISC) DTCs.

Carry out the Inverter System Controller (ISC) self-test.

Is DTC P0DA8 present?

Yes	REPLACE the high voltage harness between the Inverter System Controller (ISC) and battery REFER to: High Voltage Battery Cables .

GO to AU8

AU8 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.
- Road test the vehicle while monitoring the PID.
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.

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