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INSPECTION PROCEDURE 2: When the Parking Brake Lever is Pulled, the Brake Warning Light does not Illuminate.
 
 



 
 
TECHNICAL DESCRIPTION (COMMENT)
The parking brake switch turns on and off by operating the parking brake lever, and the brake warning light illuminates and goes out, indicating the operating status of parking brake to a driver.
 
 
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CASE:)
  • Damaged wiring harness or connector
  • Parking brake switch defective
  • Combination meter defective
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, check combination meter actuator test.
Perform the following actuator test by the combination meter system, and check if the brake warning light illuminates (Refer to GROUP 54A - Combination Meter/Actuator Test Table , ).
  • Item No.07: Indicator 1
Is the check result normal?
Go to Step 2.
Replace the combination meter (Refer to GROUP 54A, Combination meter assembly ).
 
STEP 2. Check the parking brake switch.
Refer to .
Is the parking brake switch normal?
Go to Step 3.
Replace the parking brake switch (Refer to ). Then go to Step 6.
 
STEP 3. Connector check: D-36 parking brake switch connector, C-26 intermediate connector and C-203 combination meter connector
Is the check result normal?
Go to Step 4.
Repair or replace the faulty connector (Refer to GROUP 00E, Harness Connector Inspection ). Then go to Step 6.
 
STEP 4. Check the wiring harness for an open circuit between D-36 parking brake switch connector terminal No.1 and C-203 combination meter connector terminal No.4.
(1) Disconnect D-36 parking brake switch connector from C-203 combination meter connector, and measure at the wiring harness side connector.
(2) Measure the resistance between D-36 parking brake switch connector terminal No.1 and C-203 combination meter connector terminal No.4.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 5.
A open circuit may be present in the wiring harness between D-36 parking brake switch connector terminal No.1 and C-203 combination meter connector terminal No.4. Repair the wiring harness if necessary, and then go to Step 6.
 
STEP 5. Retest the system.
Does the brake warning light illuminate when the parking brake lever is pull?
It can be assumed that this malfunction is intermittent (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the combination meter (Refer to GROUP 54A, Combination meter assembly ).
 
STEP 6. Retest the system.
Does the brake warning light illuminate when the parking brake lever is pulled?
The procedure is complete.
Return to Step 1.