DTC B2274: ACC Monitor Malfunction [09/2014 - ]: Procedure

See step  1 See step  1

Result:  NG

NG 

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

Result:  OK

OK 

See step  2

See step  2 See step  2

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  3

1. Disconnect the N92 connector from the power management control ECU.
2. Disconnect the 4A connector from the cowl side junction block RH.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N92-1 (ACCD) - 4A-19	Always	Below 1 Ω
   4A-4 - Body ground	Always	Below 1 Ω
   N92-1 (ACCD) or 4A-19 - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  4

1. Remove the cowl side junction block RH.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Cowl Side Junction Block RH)

   -

   -

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4E-1 - 4A-45	Auxiliary battery voltage not applied to terminals 4A-19 and 4A-4	10 kΩ or higher
   	Auxiliary battery voltage applied to terminals 4A-19 and 4A-4	Below 1 Ω

Result:  NG

NG 

REPLACE COWL SIDE JUNCTION BLOCK RH 

Result:  OK

OK 

See step  5

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Reconnect the power management control ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   N92-1 (ACCD) - Body ground	Power switch off → Power switch on (ACC)	1 V or less → 8.5 V or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

Result:  OK

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result:  NG

NG 

REPLACE POWER MANAGEMENT CONTROL ECU 

(Refer to REMOVAL [09/2014 - ] )