Canada - A/C - Warm Air From Vents A/C ON/DTC B1479 - Manual

Bulletin
TSB3326

Issue Date
December 10, 2009

Market
Canada

Title
WARM AIR FROM HVAC VENTS WITH A/C ON (MANUAL A/C SYSTEM)

Component
HEATING/AIR CONDITIONING

Models
'09-'10 RAV4

INTRODUCTION:
Some RAV4 vehicles with manual air conditioning systems may exhibit a condition where the HVAC system intermittently blows warm air from the vents with the A/C on.

Diagnostic Trouble Code (DTC) B1479 (Flow Sensor Circuit) may be stored in the A/C system as a current code. A malfunctioning A/C compressor flow sensor may cause this condition. Follow the procedure in this TSB to repair the vehicle.

NOTE:
Manual A/C Systems do not have the ability to store history DTCs, therefore DTC B1479 may not be present even when the flow sensor is malfunctioning.






APPLICABILITY:

PRODUCTION CHANGE INFORMATION:







This TSB applies to the following RAV4 vehicles with 2AR-FE engines and Manual Air Conditioning systems:
- All 2009 TMMC-built vehicles.
- 2009 Tahara/Shokki-built vehicles produced BEFORE the Production Change Effective VINs shown.
- 2010 TMMC-built vehicles produced BEFORE the Production Change Effective VINs shown.






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED TOOLS & EQUIPMENT:

NOTE:
- Additional Techstream units may be ordered by completing the order form on ETAS and faxing it to (416) 431-8342.
- Additional SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.

REPAIR PROCEDURE:







1. Using Techstream, inspect the A/C system flow sensor voltage DURING the inoperative condition.

NOTE:
The A/C flow sensor is malfunctioning when a voltage value between 0.7 and 4.2 V does NOT change for more than 8.0 minutes with the A/C ON. After 8 minutes, DTC B1479 may be current in the A/C system.

- If the flow sensor value does NOT change when switching the A/C system/blower ON and OFF, and is stuck between 0.7 and 4.0 V, go to step 2.
- If the flow sensor voltage is normal, this TSB does NOT apply. Refer to the problem symptoms table of the Repair Manual.

Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: RAV4
- Year: 2009/ 2010
- Service Category: Vehicle Interior
- Section: Heating/Air Conditioning
- Keyword: Air Conditioning: Air Conditioning System: (for Manual Air Conditioning System) Problem Symptoms Table

2. Check the harness and connector (A/C compressor flow sensor - A/C amplifier).







A. Disconnect the B66 flow sensor connector.







B. Disconnect the E36 amplifier connector.
C. Measure the resistance according to the value(s) in the table below.






Standard Resistance:

- If any of the harness resistance tests fail, this TSB does NOT apply. Repair or replace the harness and go to step 4.
- If all tests are within specifications, proceed to step 3.

3. Remove and replace the A/C compressor.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: RAV4
- Year: 2009/ 2010
- Service Category: Vehicle Interior
- Section: Heating/Air Conditioning
- Keyword: Air Conditioning: Compressor and Pulley (for 2AR-FE): Removal/Installation

4. Clear all DTCs and confirm the A/C system has returned to proper operation.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.