DTC B2272: Ignition 1 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 display 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 Note
   IG1 Relay Monitor (Outside)	Status of IG1 relay monitor (outer) / ON or OFF	ON: Engine switch on (IG) (IG1 relay is on) OFF: Engine switch off (IG1 relay is off)	-

   OK

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

NG → See step   3 

OK: Go to next step 

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

   Result	Proceed to
   DTC B2272 is not output.	A
   DTC B2272 is output.	B

B → See step   8 

A → See step   7 

1. Disconnect the RD and RA connectors.
   Fig 1: Cowl Side Junction Block RH 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
   RD-6 - RA-5 or RD-7	Always	68 to 175 Ω
   RD-6 - RD-12	Always	Below 1 Ω
   RD-6 - Body ground	Always	10 kΩ or higher
   RA-5 or RD-7 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Cowl Side Junction Block RH)

NG → REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 

OK: Go to next step 

1. Disconnect the LD connector.
   Fig 2: Cowl Side Junction Block LH 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
   LD-13 - LD-8 or LD-9	Always	68 to 250 Ω at 20°C (68°F)
   LD-13 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Cowl Side Junction Block LH)

NG → REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 

OK: Go to next step 

1. Disconnect the J55 connector.
   Fig 3: J55, RA And RD 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
   J55-34 (IG1D) - RD-6	Always	Below 1 Ω
   J55-34 (IG1D) or RD-6 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)
   *2	Front view of wire harness connector (to Cowl Side Junction Block RH)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - COWL SIDE JUNCTION BLOCK RH) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 4: RD And LD Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   RD-12 - LD-13	Always	Below 1 Ω
   RD-12 or LD-13 - Body ground	Always	10 kΩ or higher
   LD-8 or LD-9 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Cowl Side Junction Block RH)
   *2	Front view of wire harness connector (to Cowl Side Junction Block LH)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (COWL SIDE JUNCTION BLOCK RH - COWL SIDE JUNCTION BLOCK LH) 

OK → See step   9