DTC B2273: Ignition 2 Monitor Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. Read the Data List according to the displays on the Techstream.

   HINT: 

   When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Code
   IG2 Relay Monitor (Outside)	IG2 relay monitor (outer) / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-

   OK

   "ON" (Engine switch on (IG)) appears on the screen.

NG → See step   3 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Turn the engine switch on (IG).
3. Depress the brake pedal.
4. After 10 seconds have elapsed, check for DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC B2273 is not output.	A
   DTC B2273 is output.	B

B → See step   6 

A → See step   5 

1. Remove the IG2 relay from the engine room relay block No. 2.
   Fig 1: IG2 Relay Connector Terminal Identification

   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
   3 - 5	Battery voltage is not applied between terminals 1 and 2	10 kΩ or higher
   3 - 5	Battery voltage is applied between terminals 1 and 2	Below 1 Ω

NG → REPLACE IG2 RELAY 

OK: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 2: J55 Connector Terminal Identification And Engine Room Relay Block No. 2

   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
   J55-35 (IG2D) - Engine room relay block No. 2 IG2 relay terminal 2	Always	Below 1 Ω
   J55-35 (IG2D) or engine room relay block No. 2 IG2 relay terminal 2 - Body ground	Always	10 kΩ or higher
   Engine room relay block No. 2 IG2 relay terminal 1 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1

   Front view of wire harness connector (to Power Source Control ECU)

   *2

   Component without relay connected (Engine Room Relay Block No. 2)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - IG2 RELAY) 

OK → See step   7