Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see INITIALIZATION ).

INSPECT BATTERY
1. Check the battery voltage.
  Voltage:
  
  11 to 14 V
NG: INSPECT CHARGING SYSTEM

OK: Go to next step

CHECK DTC

Clear the DTCs (see DTC CHECK / CLEAR ).
Turn the engine switch off.
Turn the engine switch on (IG).
Check that the DTCs (Electronically Controlled Brake System and SFI system) are recorded.

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTCs (C1311/11, C1312/12, C1313/13, C1314/14 and SFI system malfunction) are not output	A
SFI system DTC is output	B (see DATA LIST / ACTIVE TEST )
DTCs (C1311/11, C1312/12, C1313/13 and C1314/14) are output	C (see DIAGNOSTIC TROUBLE CODE CHART )

B: REPAIR ENGINE CONTROL SYSTEM ACCORDING TO DTC OUTPUT

C: REPAIR CIRCUIT INDICATED BY OUTPUT CODE

A: Go to next step

INSPECT SKID CONTROL ECU (IG AND DI TERMINALS)

Disconnect the skid control ECU (A13, A15) connectors.

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

Voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
A13-16 (IG1) - Body ground	Engine switch on (IG)	10 to 14 V
A13-39 (DI1) - Body ground	Always	10 to 14 V
A15-14 (IG2) - Body ground	Engine switch on (IG)	10 to 14 V
A15-33 (DI2) - Body ground	Always	10 to 14 V

Fig 1: Identifying Skid Control ECU (IG And DI Terminal) Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG OR DI CIRCUIT)

OK: Go to next step

INSPECT SKID CONTROL ECU (GND TERMINAL)

Disconnect the skid control ECU (A13, A15) connectors.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A13-1 (GND) - Body ground	Below 1 Ω.
A15-1 (GND4) - Body ground	Below 1 Ω

Fig 2: Identifying Skid Control ECU (GND Terminal) Connector

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

OK: Go to next step

RECONFIRM DTC

Clear the DTC (see DTC CHECK / CLEAR ).
Turn the engine switch on (IG).
Check if the same DTCs are recorded (see DTC CHECK / CLEAR ).

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTCs (C1241/41 and C1242/42) are not output	A
DTCs (C1241/41 and C1242/42) are output	B

HINT:

If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE ).

B: REPLACE SKID CONTROL ECU

A: END