DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open: Notes

WARNING: This page is about a different variant/trim than selected.

1. -

Outline of diagnosis:

While the CID in HV battery is READY ON for operation, the voltage before boosting is stuck outside the battery voltage range, or the cell voltage decrease information from Battery ECU assembly is received with the cumulative value of variation amount in the voltage before boosting for a predetermined period of time large

(1 trip detection logic)

Trouble symptom:

Reduced output power
Engine not stopped
Or,
Hybrid system stopped

CAUTION:

Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
Never turn to READY ON, because turning to READY ON before the repair is completed may cause fault.

Courtesy of SUBARU OF AMERICA, INC.

CHECK DTC .

Read the DTC of [P-HEV High Voltage Battery] using the Subaru Select Monitor. Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

NOTE:

Malfunction contents	System	Related DTC
System malfunction	P-HEV High Voltage Battery	P1AC413	HYBRID/EV BATTERY STACK 1 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
		P1AC49E	HYBRID/EV BATTERY STACK 1 CURRENT INTERRUPT DEVICE STUCK ON
		P1AC513	HYBRID/EV BATTERY STACK 2 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
		P1AC59E	HYBRID/EV BATTERY STACK 2 CURRENT INTERRUPT DEVICE STUCK ON
		P1AC613	HYBRID/EV BATTERY STACK 3 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
		P1AC69E	HYBRID/EV BATTERY STACK 3 CURRENT INTERRUPT DEVICE STUCK ON
		P1AC713	HYBRID/EV BATTERY STACK 4 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
		P1AC79E	HYBRID/EV BATTERY STACK 4 CURRENT INTERRUPT DEVICE STUCK ON
		P1AC813	HYBRID/EV BATTERY STACK 5 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
		P1AC89E	HYBRID/EV BATTERY STACK 5 CURRENT INTERRUPT DEVICE STUCK ON

DTC P1AC413 may be output simultaneously due to the fault that DTC above describes .

The table above shows inspections in the order of priority .
Check DTC output simultaneously in the order described. (This allows you to identify the main cause without performing unnecessary inspections.)

When "Only DTC P1AC413 is displayed" or "DTC other than above is displayed", go to A.

When DTCs related to [P-HEV High Voltage Battery] mentioned above are simultaneously displayed, go to B.

Yes :

Go to 2.
Perform the diagnosis for the simultaneously displayed DTCs.

NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.

No : -

CHECK DTC .

Read the following DTCs using Subaru Select Monitor. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to PLUG-IN BATTERY CHARGER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

P-HEV Hybrid Powertrain Control
P-HEV Drive Motor
P-HEV High Voltage Battery
Plug-in Battery Charger

NOTE:

Malfunction contents	System	Related DTC
Microcomputer malfunction	P-HEV Hybrid Powertrain Control	P060647	HYBRID/EV POWERTRAIN CONTROL MODULE PROCESSOR WATCHDOG/SAFETY MCU FAILURE
	P-HEV Hybrid Powertrain Control	P0A1B49	DRIVE MOTOR "A" CONTROL MODULE INTERNAL ELECTRONIC FAILURE
	P-HEV Drive Motor	P0A1A47	GENERATOR CONTROL MODULE WATCHDOG/SAFETY MC FAILURE
		P0A1A49	GENERATOR CONTROL MODULE INTERNAL ELECTRONIC FAILURE
		P0A1B1F	GENERATOR CONTROL MODULE CIRCUIT INTERMITTENT
		P1C2A1C	GENERATOR A/D CONVERTER CIRCUIT CIRCUIT VOLTAGE OUT OF RANGE
		P1C2A49	GENERATOR A/D CONVERTER CIRCUIT INTERNAL ELECTRONIC FAILURE
		P313383	COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" VALUE OF SIGNAL PROTECTION CALCULATION INCORRECT
		P313386	COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" SIGNAL INVALID
	P-HEV High Voltage Battery	P060A47	HYBRID/EV BATTERY ENERGY CONTROL MODULE MONITORING PROCESSOR WATCHDOG/SAFETY MCU FAILURE
		P060B16	HYBRID/EV BATTERY ENERGY CONTROL MODULE A/D PROCESSING CIRCUIT VOLTAGE BELOW THRESHOLD
		P060B49	HYBRID/EV BATTERY ENERGY CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
	Plug-in Battery Charger	P060B49	PLUG-IN CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
	Plug-in Battery Charger	P1C1F49	HYBRID/EV BATTERY CHARGER CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
Power supply system malfunction	P-HEV Drive Motor	P06D61C	GENERATOR CONTROL MODULE OFFSET POWER CIRCUIT VOLTAGE OUT OF RANGE
	P-HEV High Voltage Battery	P1CBB12	HYBRID/EV BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT SHORT TO AUXILIARY BATTERY
	P-HEV High Voltage Battery	P1CBB14	HYBRID/EV BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT SHORT TO GROUND OR OPEN
	Plug-in Battery Charger	P1CED1C	PLUG-IN CONTROL ECU POWER SUPPLY (+12.5V) CIRCUIT VOLTAGE OUT OF RANGE
Communication system malfunction	P-HEV Hybrid Powertrain Control	P312387	LOST COMMUNICATION WITH DRIVE MOTOR CONTROL MODULE "A" FROM HYBRID/EV CONTROL MODULE MISSING MESSAGE
		U011187	LOST COMMUNICATION WITH HYBRID/EV BATTERY ENERGY CONTROL MODULE "A" MISSING MESSAGE
		U019B87	LOST COMMUNICATION WITH HYBRID/EV BATTERY CHARGER CONTROL MODULE MISSING MESSAGE
	P-HEV Drive Motor	P313387	COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" MISSING MESSAGE
	P-HEV High Voltage Battery	P060687	HYBRID/EV BATTERY ENERGY CONTROL MODULE PROCESSOR TO MONITORING PROCESSOR MISSING MESSAGE
	P-HEV High Voltage Battery	P060A87	HYBRID/EV BATTERY ENERGY CONTROL MODULE PROCESSOR FROM MONITORING PROCESSOR MISSING MESSAGE
	Plug-in Battery Charger	P0E5E87	PLUG-IN CONTROL MODULE PROCESSOR FROM HYBRID/EV BATTERY CHARGER CONTROL MODULE PROCESSOR MISSING MESSAGE
		U029387	LOST COMMUNICATION WITH HYBRID POWERTRAIN CONTROL MODULE MISSING MESSAGE
		U115087	LOST COMMUNICATION WITH HYBRID POWERTRAIN CONTROL MODULE (HYBRID/EV BATTERY LOCAL BUS) MISSING MESSAGE
Sensor and actuator circuit malfunction	P-HEV Drive Motor	P0D2D16	DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR (VH) CIRCUIT VOLTAGE BELOW THRESHOLD
	P-HEV Drive Motor	P0D2D17	DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR (VH) CIRCUIT VOLTAGE ABOVE THRESHOLD
	P-HEV High Voltage Battery	P0ABF11	HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT SHORT TO GROUND
		P0ABF15	HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT SHORT TO AUXILIARY BATTERY OR OPEN
		P0ABF28	HYBRID/EV BATTERY CURRENT SENSOR "A" SIGNAL BIAS LEVEL OUT OF RANGE/ZERO ADJUSTMENT FAILURE
		P0ABF2A	HYBRID/EV BATTERY CURRENT SENSOR "A" SIGNAL STUCK IN RANGE
		P0B0E11	HYBRID/EV BATTERY CURRENT SENSOR "B" CIRCUIT SHORT TO GROUND
		P0B0E15	HYBRID/EV BATTERY CURRENT SENSOR "B" CIRCUIT SHORT TO AUXILIARY BATTERY OR OPEN
		P0B1362	HYBRID/EV BATTERY CURRENT SENSOR "A"/"B" SIGNAL COMPARE FAILURE
	Plug-in Battery Charger	P0D4C12	HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR CIRCUIT SHORT TO AUXILIARY BATTERY
	Plug-in Battery Charger	P0D4C14	HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR CIRCUIT SHORT TO GROUND OR OPEN
System malfunction	P-HEV Hybrid Powertrain Control	P0A1F94	HYBRID/EV BATTERY ENERGY CONTROL MODULE UNEXPECTED OPERATION
		P0ABF00	HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT RANGE/PERFORMANCE
		P0D2D1C	DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR VOLTAGE OUT OF RANGE
		P0D4C1C	HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR VOLTAGE OUT OF RANGE
		P0E311C	BOOSTING CONVERTER VOLTAGE SENSOR "A" VOLTAGE OUT OF RANGE
		P1C2D62	HYBRID/EV BATTERY "A" VOLTAGE SENSOR/BOOSTING CONVERTER VOLTAGE SENSOR "A" SIGNAL COMPARE FAILURE
		P1C8349	HIGH VOLTAGE POWER RESOURCE CIRCUIT VOLTAGE SENSOR AFTER BOOSTING MALFUNCTION
	P-HEV Drive Motor	P0CA300	DC/DC CONVERTER STEP UP VOLTAGE PERFORMANCE
	P-HEV Drive Motor	P1CB69E	DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR (VH) STUCK ON

DTC P1AC413 may be output simultaneously due to the fault that DTC above describes .

The table above shows inspections in the order of priority .
Check DTC output simultaneously in the order described. (This allows you to identify the main cause without performing unnecessary inspections.)

When "Only DTC P1AC413 is displayed" or "DTC other than above is displayed", go to A.

When DTCs related to [P-HEV Hybrid Powertrain Control] mentioned above are simultaneously displayed, go to B.

When DTCs related to [P-HEV Drive Motor] mentioned above are simultaneously displayed, go to C.

When DTCs related to [P-HEV High Voltage Battery] mentioned above are simultaneously displayed, go to D.

When DTCs related to [Plug-in Battery Charger] mentioned above are simultaneously displayed, go to E.

Yes :

Go to 3.
Perform the diagnosis for the simultaneously displayed DTCs.
NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.
Perform the diagnosis for the simultaneously displayed DTCs.
NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.
Perform the diagnosis for the simultaneously displayed DTCs.
NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.
Perform the diagnosis for the simultaneously displayed DTCs.

NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.

No : -

CHECK DTC .
1. Replace Battery ECU assembly. Ref. to HYBRID ELECTRIC VEHICLE>BATTERY CONTROL MODULE .
2. Using the Subaru Select Monitor, perform the clear memory of [P-HEV Hybrid Powertrain Control]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
3. Turn to IG OFF, and wait for two minutes or more.
4. Turn to IG ON, and wait for 30 seconds or more.
  NOTE: Never turn to READY ON, because turning to READY ON before the repair is completed may cause fault.
5. Read the DTC of [P-HEV High Voltage Battery] using the Subaru Select Monitor. Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed?

Yes : Perform the diagnosis for the displayed DTCs.

No : There was something wrong with Battery ECU assembly.

Finish the diagnosis.