DTC B1925, B1926, B1927, B1928, or 78 is not output.
Text in Illustration
HINT
Codes other than DTC B1925, B1926, B1927, B1928, and 78 may be output at this time, but they are not related to this check.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY See: Relays and Modules/Relays and Modules - Restraints and
Safety Systems/Air Bag Control Module/Service and Repair/Removal
OK -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting
Up to 08/2009
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1479/79: Flow Sensor Circuit
B1479/79 - Flow Sensor Circuit
DESCRIPTION
The A/C mass flow sensor, which is mounted on the A/C compressor, is used to detect the amount of refrigerant flow. The A/C mass flow sensor
converts the amount of refrigerant flow that is detected to a voltage value to send it to the A/C amplifier. The voltage value sent from the A/C mass
flow sensor changes depending on the amount of refrigerant flow. As the amount of refrigerant flow becomes larger, the voltage becomes lower. As
the amount of refrigerant flow becomes smaller, the voltage becomes higher. The A/C amplifier supplies 5 V to the A/C mass flow sensor and
monitors changes in the voltage value sent from the A/C mass flow sensor. The A/C amplifier then sends a signal to the ECM via CAN
communication to allow the ECM to control the engine speed while the air conditioning is on.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Check the value(s) by referring to the table below.
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