DTC P1CCC-96: Dc/Dc Converter Enable Component Internal Failure: Notes

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

1. -

Detecting condition:

When any of the following is established.

DC/DC Converter malfunction occurs and Battery (12V) voltage is 11 V or less.
DC/DC Converter malfunction continues for 60 seconds and inverter coolant temperature is 70°C (158°F) or less.

(1 trip detection logic)

Trouble symptom:

Normal driving
DC/DC Converter malfunction leads to deactivation and stops charging, and Battery (12V) voltage decreases.

Wiring diagram:

Hybrid system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>HYBRID ELECTRIC VEHICLE SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

NOTE:

After repair, clear DTC memory and wait for 30 seconds or more after IG OFF. Then, perform the following operations to see if Battery (12V) voltage decrease indicated by this DTC has been solved.
While the following conditions are established with the P position and READY ON, check that [Auxiliary Battery Voltage] is 13.0 - 15.0 V for 2 minutes using data monitor. (If charging is insufficient, Battery (12V) voltage is unstable and gradually decreases when electric load is applied.)
- Headlight Hi
- A/C blower motor Hi
- Defogger ON
Perform the following operations to see if DC/DC Converter operates normally.
1. Install the AC/DC400 A probe to the Battery (12V) positive line.
2. Turn to READY ON and leave it undone until the value of current flowing to Battery (12V) decreases 10 A or less.
3. Turn to headlight Hi, A/C blower motor Hi and defogger ON with READY ON, and check that the current drawn from Battery (12V) is 0 A or less and Battery (12V) voltage is between 13.0 - 15.0 V.
This DTC may be output due to malfunction of any other parts than DC/DC Converter or some operations by the customers.
If the vehicle is used to rescue the other vehicle whose Battery (12V) goes dead, DC/DC Converter may temporarily stops due to excessive current resulting in blown fuse of the vehicle or for self-protection. Also, if the vehicle is rescued by the other vehicle equipped with 24 V battery, the same result occurs and this DTC may be output. (The vehicle will recover from temporary control stop of DC/DC Converter after DTC memory clear and IG OFF.)
Make sure that the customer does not use equipment with large electric load (large capacity audio system, electric water heater for vehicle, etc.). (Overcurrent may cause blown fuse of auxiliary equipment.)
If DC/DC Converter malfunction occurs, Battery (12V) cannot be charged. Therefore, Battery (12V) goes to dead and READY ON cannot be set again after turning to READY OFF. In this case, charge Battery (12V). However, note that charging is not available until repair is completed.
If the system turns to READY OFF immediately after READY ON, Battery (12V) voltage may decrease. Charge the Battery (12V).

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

CHECK DTC .

Read the following DTCs using Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Engine Control System
P-HEV Hybrid Powertrain Control
P-HEV Drive Motor

NOTE:

Malfunction contents	System	Related DTC
Insulation malfunction	P-HEV Hybrid Powertrain Control	P1C7C49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (A/C AREA) INTERNAL ELECTRONIC FAILURE
		P1C7D49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (HYBRID/EV BATTERY AREA) INTERNAL ELECTRONIC FAILURE
		P1C7E49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (TRANSAXLE AREA) INTERNAL ELECTRONIC FAILURE
		P1C7F49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (DIRECT CURRENT AREA) INTERNAL ELECTRONIC FAILURE
High voltage system failure	P-HEV Hybrid Powertrain Control	P0AA649	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION INTERNAL ELECTRONIC FAILURE
		P0AD911	HYBRID/EV BATTERY POSITIVE CONTACTOR CIRCUIT SHORT TO GROUND
		P0ADD11	HYBRID/EV BATTERY NEGATIVE CONTACTOR CIRCUIT SHORT TO GROUND
		P0AE411	HYBRID/EV BATTERY PRECHARGE CONTACTOR CIRCUIT SHORT TO GROUND
		P1C8449	HIGH VOLTAGE POWER RESOURCE CIRCUIT SHORT DURING READY ON
		P300449	HIGH VOLTAGE POWER RESOURCE CIRCUIT SHORT DURING PRE-CHARGE
System malfunction	P-HEV Hybrid Powertrain Control	P0A9300	INVERTER "A" COOLING SYSTEM PERFORMANCE
		P0C7396	MOTOR ELECTRONICS COOLANT PUMP "A" COMPONENT INTERNAL FAILURE
		P314A31	MOTOR ELECTRONICS COOLANT PUMP "A" NO SIGNAL
	P-HEV Drive Motor	P0E5717	DC/DC CONVERTER VOLTAGE SENSOR "A" (VL) CIRCUIT VOLTAGE ABOVE THRESHOLD
	Engine Control System	P059F	ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF
		P05A0	ACTIVE GRILLE AIR SHUTTER "A" STUCK ON
		P05A1	ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR MINIMUM/MAXIMUM STOP PERFORMANCE
		P059A	ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR CIRCUIT
		P05A2	ACTIVE GRILLE AIR SHUTTER "A" CONTROL CIRCUIT/OPEN
		U0077	LIN COMMUNICATION BUS "ECM/PCM" OFF
		U0284	LOST COMMUNICATION WITH ACTIVE GRILLE SHUTTER MODULE "A"

When "Only DTC P1CCC96 is displayed" or "DTC other than above is displayed at the same time", 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 [Engine Control System] mentioned above are simultaneously displayed, go to D.

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.
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 CONNECTION STATUS OF Slow blow fuse .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
2. Check if the Slow blow fuse terminals (Inverter with converter assembly side and Battery (12V) side) are tightened to the specified torque, and are free from looseness and poor contact.
Standard:

7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

Is it tightened to the specified torque, and free from looseness and poor contact?

Yes: Connect the connector securely. Or repair the poor contact of connector.

No: Go to 3.
CHECK Slow blow fuse .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Connect the Battery (12V) ground terminal. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
2. Using a tester, measure the voltage between Slow blow fuse and chassis ground.
Connector & terminal

Slow blow fuse (Inverter with converter assembly side) (+) - Chassis ground (-):

Is voltage equivalent to Battery (12V) voltage?

Yes: Go to 4.

No: Replace Slow blow fuse. Ref. to HYBRID ELECTRIC VEHICLE>RELAY AND FUSE .
CHECK ENGINE Wire harness (OPEN) .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
2. Remove the IGCT IG relay from the Relay holder. Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>FUSE AND RELAY .
3. Using the tester, measure the resistance between IGCT IG relay terminal and Slow blow fuse.
Connector & terminal

(B225) No. 32 - Slow blow fuse (Inverter with converter assembly side):

Is the resistance less than 1 Ω?

Yes: Go to 5.

No: Go to 7.
CHECK Cooling System .
Check Cooling System. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>COOLING SYSTEM .

Is the Cooling System OK?

Yes: Go to 6.

No: Repair according to Cooling System inspection. And then, Go to 6.

CHECK DC/DC Converter FUNCTION .

NOTE: Check the current drawn from Battery (12V).

Install the AC/DC400 A probe to the Battery (12V) positive line.
Attach the Service plug. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
Connect the Battery (12V) ground terminal. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .

Turn to READY ON and leave it undone until the value of current flowing to the Battery (12V) decreases 10 A or less.

NOTE: If the system turns to READY OFF immediately after READY ON, Battery (12V) voltage may decrease. Charge the Battery (12V) and restart the procedure.

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Turn to headlight Hi, A/C blower motor Hi and defogger ON with READY ON.

Measure the current according to the table below.

NOTE:

Item	Inspection conditions	Standard
Current drawn from Battery (12V)	READY ON (Headlight Hi) (A/C blower motor Hi) (Defogger ON)	0 A or less (No current drawn from Battery (12V))

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Measure the voltage according to the table below.

NOTE:

Item	Inspection conditions	Standard
Battery (12V) positive terminal - Battery (12V) negative terminal	READY ON (Headlight Hi) (A/C blower motor Hi) (Defogger ON)	13 - 15 V

Is the check result OK?

Yes: Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .

No: Go to 8.

CHECK Slow blow fuse .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Disconnect the ground terminal of Battery (12V). Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
2. Remove the Slow blow fuse.
3. Using a tester, measure the resistance between Slow blow fuse terminals.
Connector & terminal

Slow blow fuse (Inverter with converter assembly) - Slow blow fuse (Battery (12V)):

Is the resistance less than 1 Ω?

Yes: Replace the engine Wire harness.

No: Replace Slow blow fuse. Ref. to HYBRID ELECTRIC VEHICLE>RELAY AND FUSE .
CHECK INSULATION OF HIGH VOLTAGE SYSTEM .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
2. Using a megohmmeter (500 V range), measure the resistance between Power cable (on Inverter with converter assembly side) terminal and chassis ground and shield line ground.
CAUTION: When performing this check, be sure to set megohmmeter to 500 V. Using a range higher than 500 V may damage the part being checked.

NOTE: Check the Power cable with the cable connected.

Connector & terminal

(HV99) W1 - Chassis ground and shield line ground:

(HV99) U1 - Chassis ground and shield line ground:

(HV99) V1 - Chassis ground and shield line ground:

(HV99) W2 - Chassis ground and shield line ground:

(HV99) W2 - Chassis ground and shield line ground:

(HV99) W2 - Chassis ground and shield line ground:

Is the resistance 1 MΩ or more?

Yes: Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .

No: Go to 9.
CHECK GENERATOR HIGH-VOLTAGE CIRCUIT .
Check GENERATOR HIGH-VOLTAGE CIRCUIT. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>GENERATOR HIGH-VOLTAGE CIRCUIT .

Is the GENERATOR HIGH-VOLTAGE CIRCUIT OK?

Yes: Go to 10.

No: Repair according to GENERATOR HIGH-VOLTAGE CIRCUIT inspection. And then, Go to 10.
CHECK MOTOR HIGH-VOLTAGE CIRCUIT .
Check MOTOR HIGH-VOLTAGE CIRCUIT. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>MOTOR HIGH-VOLTAGE CIRCUIT .

Is the MOTOR HIGH-VOLTAGE CIRCUIT OK?

Yes: Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .

No: Repair according to MOTOR HIGH-VOLTAGE CIRCUIT inspection.