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

id0903d5807800

5

Brake system warning light illuminates

POSSIBLE CAUSE

•  DSC HU/CM malfunction

•  Brake fluid level sensor malfunction

•  Parking brake switch malfunction

•  Instrument cluster malfunction

•  Poor connection of instrument cluster connector, terminal damage

•  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

•  Malfunction in brake switch signal input to PCM (Vehicles with brake override system, without malfunction warning light)

5	Brake system warning light illuminates
POSSIBLE CAUSE	• DSC HU/CM malfunction • Brake fluid level sensor malfunction • Parking brake switch malfunction • Instrument cluster malfunction • Poor connection of instrument cluster connector, terminal damage • 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 • Malfunction in brake switch signal input to PCM (Vehicles with brake override system, without malfunction warning light)

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	• Are there a number of warning lights illuminated?	Yes	Go to Step 6.
2	• Are there a number of warning lights illuminated?	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	Vehicles with brake override system, without malfunction warning light: • Go to the next step. Others: • Go to Step 5.
4	• Reactive the DTC of PCM using M-MDS. (See ON-BOARD DIAGNOSTIC TEST [13B-MSP].) • Is the DTC P0571 or P0703 detected?	Yes	Go to applicable DTC troubleshooting procedure. (See DTC P0571 [13B-MSP].) (See DTC P0703 [13B-MSP].)
4		No	Go to the next step.
5	• Disconnect the negative battery cable. • Measure the resistance between the DLC-2 terminals F and E. • Is the resistance below 60 ohms?	Yes	Go to the next step.
5		No	Go to Step 8.
6	• 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.
6		No	Replace the instrument cluster.
7	• Connect the M-MDS to DLC-2. • Retrieve the on-demand and continuous memory DTC from DSC HU/CM. • Is there any DTC displayed?	Yes	Perform the appropriate DTC troubleshooting procedure. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
7		No	Go to the next step.
8	• Turn the ignition switch to LOCK position. • 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 1J and 1L. • 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.