DTC B2272 Ignition 1 Monitor Malfunction: Wiring Diagram

1. Remove the ECU-IG RH fuse from the cowl side J/B RH.
2. Measure the resistance of the fuse.

   Standard resistance: Below 1 Ω 

NG : REPLACE FUSE 

1. Disconnect the RD J/B connector.
2. Disconnect the J55 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection (Symbols)	Specified Condition
   RD-6 - J55-34 (IG1D)	Below 1 Ω
   RD-5 or RD-7 - Body ground	Below 1 Ω
   RD-6 or J55-34 (IG1D) - Body ground	10 kΩ or higher

   Fig 2: Identifying J/B RH Connector (Cowl Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : GO TO NEXT STEP 

1. Disconnect the RN J/B connector.
2. Measure the resistance of the J/B connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   RN-1 - RD-14	When battery voltage is not applied to terminals RD-6 and RD-5 or RD-7	10 kΩ or higher
   RN-1 - RD-14	When battery voltage is applied to terminals RD-6 and RD-5 or RD-7	Below 1 Ω

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE)	B
   OK (When troubleshooting according to the DTC chart)	C

   Fig 3: Identifying RN J/B Connector (Cowl Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

C : REPLACE POWER SOURCE CONTROL ECU 

A : REPLACE COWL SIDE J/B RH