A/C/Interior - Water Leak From Cowl Area
T-SB-0061-12April 6, 2012
Cowl Water Leak
Service Category
Vehicle Interior
Section
Heating/Air Conditioning
Market
USA
Applicability
Introduction
In a limited number of vehicles water from outside the vehicle may enter the HVAC system through the cowl cover. Evidence of water entry will be found in the blower motor housing on the blower motor or on the carpet below the blower motor. If water is found in one of these areas an updated cowl panel is available to address this condition.
Warranty Information
Parts Information
Production Change Information
This bulletin applies to all of the following:
^ All NUMMI produced Tacoma vehicles
^ All TMMTX and TMMBC produced Tacoma vehicles manufactured BEFORE the Production Change Effective VINs shown.
Repair Procedure
1. Verify proper blower motor operation. If the blower motor does NOT operate correctly follow the Repair Manual Problem Symptoms Table to diagnose the blower motor issue.
2. Verify there is water in/on the blower motor housing blower motor or the carpet below the blower motor. If water is found in any of these locations follow the cowl replacement procedure below.
3. Using a screwdriver wrapped with protective tape remove the 2 front wiper arm head caps.
4. Remove the front wiper arms.
A. Operate the wiper then stop the windshield wiper motor assembly at the automatic stop position.
B. Remove the nut on the left and right wiper arm.
5. Disengage the 2 claws on the right and left fender to cowl side seal.
6. Remove the cowl top ventilator louver sub-assembly.
A. Disengage the 2 clips.
B. Disengage the 15 claws then remove the cowl top ventilator louver sub-assembly.
7. Install the NEW cowl top ventilator louver sub-assembly.
A. Engage the 15 claws and install the cowl top ventilator louver sub-assembly.
B. Engage the 2 clips.
8. Install both front fender cowl side seals.
9. Install the front wiper arms.
A. Ensure that the wiper arm serration portion is clear of any debris.
B. Clean the wiper pivot serration with a wire brush.
C. Operate the wiper then stop the windshield wiper motor assembly at the automatic stop position.
D. Install the front wiper arms into the position shown in the illustration.
Torque: 21 N*m (209 kgf*cm, 15 ft*lbf)
E. Operate the front wipers while spraying water or washer fluid on the windshield. Ensure that there is no interference between the blades and pillar.
10. Engage the claw and install the 2 front wiper arm head caps.
11. Verify the HVAC System and the windshield wipers are operating correctly.