Brake Warning Light Remains ON

1. Check if the ABS DTC is output (See Pub. No. S1-YXZE05A, page 05-108).
   
   Result:
   

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

A [2] CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

B REPAIR CIRCUIT INDICATED BY OUTPUT DTC (See DIAGNOSIS TROUBLE CODE CHART)

1. Check if the skid control ECU connector is securely connected.
   
   OK: The connector should be securely connected.
   　

CONNECT CONNECTOR TO ECU CORRECTLY

[3] CHECK BATTERY

1. Check the battery voltage.

   Standard voltage: 20 to 32 V
   

CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (See chapter CH)

[4] INSPECT SKID CONTROL ECU (IG1 TERMINAL)

1. Disconnect the skid control ECU connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value (s) in the table below.
   
   
   Standard voltage:

   Tester Connection	Switch Condition	Specified Condition
   S13-7 (IG) - Body ground	Ignition switch ON	20 to 32 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

[5] INSPECT SKID CONTROL ECU (GND TERMINAL)

1. Turn the ignition switch off.
2. Disconnect the skid control ECU connectors.
3. Measure the resistance according to the value (s) in the table below.
   
   
   
   Standard resistance:
   

   Tester Connection	Condition	Specified Condition
   S14-2 (GND1) - Body ground	Always	Below 1 Ω
   S14-3 (GND2) - Body ground	Always	Below 1 Ω
   S11-15 (GND3) - Body ground	Always	Below 1 Ω
   S11-14 (GND4) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

[6] INSPECT BRAKE FLUID LEVEL WARNING SWITCH

1. Turn the ignition switch off.
2. Remove the reservoir filler cap and strainer.
3. Disconnect the brake fluid level warning switch connector.
4. Measure the resistance according to the value (s) in the table below.
   
   
   A float is located inside the reservoir. Its position can be changed by increasing or decreasing the level of brake fluid.
   
   
   Standard resistance:
   

   Tester Connection	Switch Condition	Specified Condition
   1-2	Switch OFF (Float up)	1.9 to 2.1 kΩ
   1-2	Switch ON (Float down)	Below 1 Ω

   
   
   If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level.
   

REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH)

[7] CHECK HARNESS AND CONNECTOR (COMBINATION METER - BRAKE FLUID LEVEL WARNING SWITCH)

1. Disconnect the combination meter connector.
2. Measure the resistance according to the value (s) in the table below.
   

   
   
   Standard resistance:

   Tester Connection	Condition	Specified Condition
   C5-16 (PKB) - B5-2	Always	Below 1Ω
   C5-16 (PKB) - Body ground	Always	10 kΩ or higher
   B5-1 - Body ground	Always	Below 1Ω

   
   　

REPAIR OR REPLACE HARNESS OR CONNECTOR

[8] CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value (s) in the table below.
   
   
   Standard resistance:

   Tester Connection	Condition	Specified Condition
   S13-14 (BRL) - C5-19 (PKBI)	Always	Below 1Ω
   S13-14 (BRL) - Body ground	Always	10 kΩ or higher

   　

REPAIR OR REPLACE HARNESS OR CONNECTOR

[9] REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY

1. Check the combination meter.
   
   OK: The combination meter is normal.
   
   
   
   • Reinstall the connectors and restore the vehicle to its prior condition before checking the combination meter.
   • 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 DIAGNOSIS SYSTEM).

　

REPLACE COMBINATION METER ASSEMBLY

REPLACE SKID CONTROL ECU

1. Turn the ignition switch off.
2. Disconnect the parking brake switch connector.
3. Measure the resistance according to the value (s) in the table below.
   
   
   Standard resistance:
   

   Tester Connection	Condition	Specified Condition
   2-3	Parking brake switch ON (Switch pin free)	Below 1Ω
   2-3	Parking brake switch OFF (Switch pin pushed in)	10 kΩ or higher

REPLACE PARKING BRAKE SWITCH

[11] CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH)

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value (s) in the table below.
   
   
   Standard resistance:

   Tester Connection	Condition	Specified Condition
   S13-21 (PKB1) - P7-2	Always	Below 1Ω
   S13-21 (PKB1) - Body ground	Always	10 kΩ or higher
   P7-3 - Body ground	Always	Below 1Ω

   
   
   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).
   

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE SKID CONTROL ECU