NO. 5 BRAKE SYSTEM WARNING LIGHT ILLUMINATES[INSTRUMENT CLUSTER]

id0903d5807800

5

Brake system warning light illuminates

POSSIBLE CAUSE

•  ABS HU/CM or DSC HU/CM malfunction

•  Brake fluid level sensor malfunction

•  Parking brake switch malfunction

•  Instrument cluster malfunction

•  Connector or pin malfunction

•  Short circuit in wiring harness between CAN-L, CAN-H and GND

•  Open circuit in CAN wiring harness (CAN-L, CAN-H)

•  CAN wiring harness (CAN-L, CAN-H) short each other

5	Brake system warning light illuminates
POSSIBLE CAUSE	• ABS HU/CM or DSC HU/CM malfunction • Brake fluid level sensor malfunction • Parking brake switch malfunction • Instrument cluster malfunction • Connector or pin malfunction • Short circuit in wiring harness between CAN-L, CAN-H and GND • Open circuit in CAN wiring harness (CAN-L, CAN-H) • CAN wiring harness (CAN-L, CAN-H) short each other

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Start the engine. • Release the parking brake. • Does the brake system warning light turn off?	Yes	Troubleshooting completed.
1		No	Go to the next step.
2	• Inspect the DTC for the ABS ON-BOARD DIAGNOSTIC SYSTEM. • Has DTC been recorded in memory?	Yes	Go to the applicable DTC troubleshooting procedure. (See ON-BOARD DIAGNOSIS[ABS].) (See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)
2		No	Go to the next step.
3	• Does the brake fluid need replenishment?	Yes	Add brake fluid.
3	• Does the brake fluid need replenishment?	No	Go to the next step.
4	• Inspect the brake fluid level sensor, parking brake switch or connectors. • Is there any malfunction?	Yes	Repair or replace malfunctioning part.
4		No	Go to the next step.
5	• Start the instrument cluster input/output check mode. (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.) • Does the brake system warning light turn off with a check code other than 26?	Yes	Inspect the ABS HU/CM, DSC HU/CM, brake fluid level sensor, parking brake switch or connectors.
5		No	Replace the instrument cluster.
6	• Disconnect the negative battery cable. • Measure the resistance between the DLC-2 terminals F and E. • Is the resistance 54—66 ohms?	Yes	Go to the next step.
6		No	Go to Step 7.
7	• Disconnect the negative battery cable. • Inspect the DLC-2 terminals F and E for short to power supply or GND. • Is there any malfunction?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
7		No	Replace the instrument cluster.
8	• Turn the ignition switch off. • Inspect the instrument cluster connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). • Are the terminals normal?	Yes	Go to the next step.
8		No	Repair or replace the terminal.
9	• Disconnect the negative battery cable. • Measure the resistance between the instrument cluster connector terminals 1I and 1K. • Is the resistance 114—126 ohms?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
9		No	Replace the instrument cluster.