B2272

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): B2272: Ignition 1 Monitor Malfunction
B2272 - Ignition 1 Monitor Malfunction

DESCRIPTION

This DTC is stored when there is a problem in the IG1 output circuit, which is from the inside of the power source control ECU to the RH-IG or LH-IG relay.

HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Power Source Control / Data List.

(e) 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





OK:

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

NG -- CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)
OK -- Continue to next step.

2. CHECK FOR DTC

(a) Clear the DTCs Smart Access System With Push-Button Start (for Start Function).

(b) Turn the engine switch on (IG).

(c) Depress the brake pedal.

(d) After 10 seconds have elapsed, check.

(e) Check for DTCs again.

Result:





B -- REPLACE POWER SOURCE CONTROL ECU Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

3. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

(a) Disconnect the RD and RA connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)
OK -- Continue to next step.

4. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

(a) Disconnect the LD connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - COWL SIDE JUNCTION BLOCK RH)

(a) Disconnect the J55 connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - COWL SIDE JUNCTION BLOCK RH)
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - COWL SIDE JUNCTION BLOCK LH)

(a) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





Text in Illustration





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

OK -- REPLACE POWER SOURCE CONTROL ECU Removal