DTC B2274: ACC Monitor Malfunction [08/2015 - 08/2019]: Procedure

See step  1

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

See step  2

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the driver side junction block assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2C-48 - 2B-4	20°C (68°F)	101.25 to 123.75 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Driver Side Junction Block Assembly)

Result: 

NG 

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) 

Result: 

OK 

See step  4

1. Disconnect the F80 power management control ECU connector.
2. Disconnect the 2C 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
   F80-19 (ACCD) - 2C-48	Always	Below 1 Ω
   F80-19 (ACCD) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

See step  6

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Connect the power management control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component with harness connected (Power Management Control ECU)

   -

   -

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   F80-19 (ACCD) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)	((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

NG 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )