2010 Toyota Corolla L4-1.8L (2ZR-FE) B Code Charts Page 448

(c) After 15 seconds have elapsed, check if the trouble occurs again.

OK:

DTC B2273 is not output.

NG -- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - ECM)

OK -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - ECM)

(a) Disconnect the E52 ECU connector.

(b) Disconnect the A50 ECM connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION

BLOCK) - ECM)

OK -- Continue to next step.

3. INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

(a) Reconnect the E52 connector.