Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2009COROLLA S, 1.8 U, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLBRAKE CONTROL/DYNAMIC CONTROL SYSTEMVEHICLE STABILITY CONTROL SYSTEMABS WARNING LIGHT REMAINS ONINSPECTION PROCEDURE

2009 Toyota Corolla S, 1.8 U, Standard

Inspection Procedure

2009 Toyota Corolla S, 1.8 U, StandardSECTION Inspection Procedure

NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION ).

CHECK CAN COMMUNICATION SYSTEM

Check if a CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

Result

RESULT CHART

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

B: INSPECT CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step

CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
1. Check if the skid control ECU connector is securely connected.
  OK:
  
  The connector is securely connected.
NG: CONNECT CONNECTOR TO ECU CORRECTLY

OK: Go to next step

CHECK BATTERY

Check the battery voltage.
Standard Voltage:

11 to 14 V

Result

RESULT CHART

Result	Proceed to
OK	A
NG (for 2AZ-FE)	B
NG (for 2ZR-FE)	C

B: CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2AZ-FE) (See PROBLEM SYMPTOMS TABLE )

C: CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2ZR-FE) (See PROBLEM SYMPTOMS TABLE )

A: Go to next step

INSPECT SKID CONTROL ECU (IG1 TERMINAL)

Disconnect the skid control ECU connector.
Turn the ignition switch to ON.

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
A66-34 (IG1) - Body ground	Ignition switch ON	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

Fig 1: Identifying Skid Control ECU Connector Terminals (IG1)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

INSPECT SKID CONTROL ECU (GND1 TERMINAL)

Turn the ignition switch off.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
A66-1 (GND1) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)

Fig 2: Identifying Skid Control ECU Connector Terminals (GND1)

OK: Go to next step

INSPECT COMBINATION METER ASSEMBLY
1. Reconnect the skid control ECU connector.
2. Perform the Active Test of the combination meter (meter CPU) using the Techstream (See DATA LIST / ACTIVE TEST ).
3. Check the combination meter.
  OK:
  
  The ABS warning light turns on or off in accordance with the Techstream operation.
  
  HINT:
  
  If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE ).
NG: REPLACE COMBINATION METER ASSEMBLY (See COMBINATION METER )

OK: REPLACE BRAKE ACTUATOR ASSEMBLY (See REMOVAL )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.