DTC B2273: Ignition 2 Monitor Malfunction: Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn Techstream main switch on.
3. Read the Data List according to the displays on the tester.

   HINT: 

   When using 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 tester and vehicle starts.

   MAIN BODY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   IG2 Relay Mon1	Status of IG2 relay monitor (outer) / ON or OFF	ON: Engine switch on (IG) (IG2 relay is ON) OFF: Engine switch off (IG2 relay is OFF)	-

   OK

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

NG → See step   4 

OK: Go to next step 

1. Check the power source mode changes.
   1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:

      OK

      off → on (ACC) → on (IG) → off

NG → See step   6 

OK: Go to next step 

1. Delete the DTCs, refer to DTC CHECK / CLEAR .
2. Check for DTCs again.

   OK

   No DTC is output.

NG → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK 

OK → See step   7 

1. Remove the IG2 relay from the engine room relay block.
   Fig 1: Identifying ST CUT Relay Connector Terminals

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

NG → REPLACE IG2 RELAY 

OK: Go to next step 

1. Disconnect the D7 ECU connector.
   Fig 2: Identifying D7 ECU Connector Terminals

   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
   Engine room relay block IG2 relay terminal 1 - D7-11 (IG2D)	Always	Below 1 Ω
   D7-11 (IG2D) - Body ground	Always	10 kΩ or higher
   Engine room relay block IG2 relay terminal 2 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)