NO.7 BRAKE SYSTEM WARNING LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON [APPLIED VIN (ASSUMED): JM0 DY10Y100 100001-108401, JM6 DY10*100 100001-109000]


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7

BRAKE system warning light stays on more than 4 seconds with ignition switch on. (Parking brake is released.)

[TROUBLESHOOTING HINTS]

• Instrument cluster or ABS HU/CM malfunction

• Short to ground in circuit in parking brake switch

Diagnostic procedure

1
INSPECT BRAKE FLUID LEVEL
• Is brake fluid level normal?
Yes
Go to next step.
No
Add brake fluid.
2
CHECK FOR DTCs in ABS/TCS HU/CM
• Have DTCs been recorded in memory?
Yes
Perform inspection using appropriate DTC.
No
Go to next step.
3
VERIFY WHETHER MALFUNCTION IS IN PARKING BRAKE SWITCH
• Disconnect parking brake switch connector
• Does BRAKE system warning light go out with ignition switch on?
Yes
Replace parking brake switch.
No
Perform the following inspections. Repair if necessary.
• Short to ground in wiring harness between instrument cluster (BRAKE system warning light) and parking brake switch.
Inspect instrument cluster.

*4

INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC -2(DATA LINK CONNECTOR-2) FOR CONTINUITY
• Disconnect ABS HU/CM connector.
• Is there continuity between SST connector terminal AQ and data link connector?
Yes
Go to next step.
No
Repair wiring harness between ABS HU/CM and data link connector.

*5

INSPECT WIRING HARNESS BETWEEN ABS/ HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR SHORT TO B+
Is voltage approx. 12 V at connector terminal AQ?
Yes
Repair wiring harness between ABS HU/CM and data link connector.
No
Go to next step.

*6

INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND DLC-2 (DATA LINK CONNECTOR-2) FOR SHORT TO GROUND
Is there continuity between connector terminal AQ and ground?
Yes
Repair wiring harness between ABS HU/CM and data link connector.
No
Replace ABS CM (communication circuit malfunction in ABS CM).

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.