DTC BMS_f079: Contactor Power Supply Interrupted [09/2013 - ]: Procedure

1. Visually check the connection of the service plug grip to the electric vehicle battery assembly. Remove the service plug grip and check for contamination.

   OK

   Dirt or foreign objects have not entered the connection, and there is no evidence of contamination.

2. Securely reinstall the service plug grip.

NG → See step   17 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: System Select / Health Check.
5. Read the DTCs.
   RESULT
   
   

   Result	Proceed to
   Only BMS_f079 is output	A
   BMS_f079 and other DTCs are output	B

   HINT: 

   If any DTCs other than alert code BMS_f079 are output, troubleshoot those DTCs first.

B → GO TO DTC CHART 

A: Go to next step 

1. Inspect the auxiliary battery voltage. Refer to ON-VEHICLE INSPECTION [09/2013 - ] .

   OK

   Battery is not depleted.

NG → See step   13 

OK: Go to next step 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E128-2 (CNT-) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Pyrotechnic Safety Switch Assembly)

NG → See step   6 

OK: Go to next step 

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1. Disconnect connector h1 from the electric vehicle battery.

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2. Disconnect connector E128 from the pyrotechnic safety switch.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   h1-7 (CNTB) - E128-2 (CNT-)	Power switch off	Below 1 Ω
   h1-7 (CNTB) or E128-2 (CNT-) - Body ground and other terminals	Power switch off	1 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Electric Vehicle Battery Assembly)
   *b	Front view of wire harness connector (to Pyrotechnic Safety Switch Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   16 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E128-1 (CNT+) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Pyrotechnic Safety Switch Assembly)

NG → See step   7 

OK → See step   14 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   1B-8 - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Integration Relay)

NG → See step   8 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - PYROTECHNIC SAFETY SWITCH) 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   1C-1 - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Integration Relay)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - AUXILIARY BATTERY) 

OK: Go to next step 

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1. Remove the CONTACTOR fuse from the No. 1 motor compartment room relay block and junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   CONTACTOR fuse terminals	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	No. 1 Motor Compartment Room Relay Block and Junction Block Assembly
   *2	CONTACTOR Fuse

NG → CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

OK: Go to next step 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   1B-6 - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Integration Relay)

NG → See step   12 

OK: Go to next step 

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1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   1B-7 - Body ground	Power switch on (IG)	0 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Integration Relay)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - BODY GROUND) 

OK → REPLACE INTEGRATION RELAY (CONTACTOR RELAY) 

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1. Disconnect connector 1B from the integration relay.

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2. Disconnect connector E117 from the power management control ECU.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1B-6 - E117-3 (SMRP)	Power switch off	Below 1 Ω
   1B-6 or E117-3 (SMRP) - Body ground and other terminals	Power switch off	1 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Integration Relay)
   *b	Rear view of wire harness connector (to Power Management Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   15