2010 Toyota Corolla L4-1.8L (2ZR-FE) Diagnostic Trouble Codes ( DTC ): U Code Charts Page 4

B -- RECONFIRM DTC

A -- Continue to next step.

2. CHECK IF EACH SENSOR AND ECM CONNECTOR IS SECURELY CONNECTED

(a) Turn the ignition switch off.

(b) Check if each sensor or ECM connector is securely connected.

OK:

Each connector is securely connected.

NG -- CONNECT CONNECTOR TO EACH SENSOR OR ECM CORRECTLY

OK -- Continue to next step.

3. RECONFIRM DTC

(a) Turn the ignition switch off.

(b) Record the output DTCs (for ABS, VSC system and/or CAN communication system) See: Brakes and Traction Control/Antilock

Brakes / Traction Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Vehicle Stability Control

System for ABS and VSC system, or See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and

Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/Diagnosis System for CAN communication

system).

HINT

If CAN communication system DTCs and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor

DTCs (for ABS and/or VSC system) after the CAN communication system returns to normal.

Result:

C -- INSPECT CAN COMMUNICATION SYSTEM See: Powertrain Management/Computers and Control Systems/Information

Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/How to Proceed With

Troubleshooting

B -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC See: Diagnostic Trouble Code Descriptions/Vehicle Stability Control

System

A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) See: Brakes and Traction Control/Antilock

Brakes / Traction Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Vehicle Stability Control

System/Diagnosis System

4. REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Turn the ignition switch off.

(b) Repair or replace the harness or connector.

(c) Check for any momentary interruption between the skid control ECU and each sensor or ECM See: Brakes and Traction

Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Vehicle

Stability Control System/Check for Intermittent Problems.

(d) Check that there are no momentary interruptions.

NEXT -- Continue to next step.

5. RECONFIRM DTC

(a) Turn the ignition switch off.

(b) Clear the DTCs See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/Vehicle Stability Control System.