DTC B2273: Ignition 2 Monitor Malfunction: Procedure

1. Use the Data List to check if the ignition relay No. 2 (IG2) is functioning properly.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   IG2 Relay Monitor(Inside)	Ignition relay No. 2 (IG2) inner relay monitor/ON or OFF	ON: Power switch ON (IG) OFF: Power switch OFF	-

   OK

   When the power switch is turned ON (IG), ON is displayed on the Techstream screen.

NG → See step   3 

OK: Go to next step 

1. Ensure the key is inside the cabin.
2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed.

   OK

   OFF → ON (ACC) → ON (IG) → OFF

NG → See step   7 

OK → See step   6 

Fig 1: Identifying Ignition Relay No. 2 (IG2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher

NG → See step   5 

OK: Go to next step 

Fig 2: Checking Harness And Connector (Main Body ECU - Ignition Relay No. 2 (IG2) And Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L12 main body ECU connector.
2. Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction block.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L12-11 (IG2D) - Ignition relay No. 2 (IG2) relay terminal 1	Always	Below 1 Ω
   Ignition relay No. 2 (IG2) relay terminal 2 - Body ground	Always	Below 1 Ω
   L12-11 (IG2D) or ignition relay No. 2 (IG2) relay terminal 1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU