DTC B15CC: Backup Battery Failure [06/2015 - 01/2018]: Procedure

1. Turn the power switch off.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG) and wait for 10 seconds.
4. Perform "HEALTH CHECK" and check for current DTCs.

   Refer to HEALTH CHECK [06/2015 - 01/2018]

   Result

   Result	Proceed to
   DTC B15CC is output	A
   DTC B15CC is not output	B

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018] 

Result: 

A 

See step  2

1. Disconnect the G55 DCM (Telematics Transceiver) connector.
2. Disconnect the G104 mayday battery (back-up battery) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G55-30 (BBI+) - G104-1 (BBO+)	Always	Below 1 Ω
   G55-13 (BBI-) - G104-5 (BBO-)	Always	Below 1 Ω
   G55-20 (CTR1) - G104-3 (BTR1)	Always	Below 1 Ω
   G55-21 (CTR2) - G104-4 (BTR2)	Always	Below 1 Ω
   G55-30 (BBI+) - Body ground	Always	10 kΩ or higher
   G55-13 (BBI-) - Body ground	Always	10 kΩ or higher
   G55-20 (CTR1) - Body ground	Always	10 kΩ or higher
   G55-21 (CTR2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Replace the mayday battery (back-up battery) with a normal one and check if the same problem occurs again.

   Refer to REMOVAL [06/2015 - 01/2018]

   NOTE:

   The mayday battery (back-up battery) must not be replaced while an ACN call is in progress.

   Refer to ACN CALL END [06/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTC.

   Refer to DTC CHECK / CLEAR [06/2015 - ]

   Body Electrical > Telematics > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Recheck for DTCs and check if the same trouble occurs again.

   Refer to DTC CHECK / CLEAR [06/2015 - ]

   OK

   No DTC is output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (MAYDAY BATTERY [BACK-UP BATTERY] IS DEFECTIVE) 

Result: 

NG 

See step  6

1. Replace the DCM (Telematics Transceiver).

   Refer to REMOVAL [06/2015 - 01/2018]

   NOTE:

   • The power switch must be off.
   • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Perform "PRL UPDATE".

   Refer to PRL UPDATE [06/2015 - 01/2018]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [06/2015 - 01/2018]