DTC B2274: ACC Monitor [08/2019 - ]: Procedure

See step  1

Result

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE 

Result: 

OK 

See step  2

See step  2

Result

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the F113 certification ECU (smart key ECU assembly) connector.
2. Disconnect the 2N and 2O driver side junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F113-9 (ACCD) - 2N-23	Always	Below 1 Ω
   2O1 - Body ground	Always	Below 1 Ω
   F113-9 (ACCD) or 2N-23 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the driver side junction block Assembly.

   Refer to REMOVAL [08/2019 - ]

2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Driver Side Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2N-23 - 2O-1	20°C (68°F)	130.92 to 190.74 Ω
   2K-1 - 2N-50	Battery voltage not applied to terminals 4A-23 and 4B-1	10 kΩ or higher
   	Battery voltage applied to terminals 4A-23 and 4B-1	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [08/2019 - ] 

Result: 

OK 

See step  5

1. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F113-9 (ACCD) - Body ground	Engine switch off → Engine switch on (ACC)	1 V or less → 8.5 V or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (TEMPORARY CONNECTION FAILURE IS SUSPECTED). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [08/2019 - ]