DESCRIPTION The side collision sensor LH circuit (bus 1) consists of the airbag ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. The side airbag pressure sensor LH and side No. 2 airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed. These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (bus 1).
WIRING DIAGRAM  CAUTION / NOTICE / HINT NOTICE: After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. Click here
PROCEDURE
(a) Turn the engine switch off. (b) Disconnect the cable from the negative (-) battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. (c) Check that the connectors are properly connected to the side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected. OK: The connectors are properly connected.
(a) Disconnect the connectors from the side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH. (b) Check that the terminals of the connectors are not deformed or damaged. OK: The terminals are not deformed or damaged.
(b) Connect the cable to the negative (-) battery terminal. (c) Turn the engine switch on (IG). (d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(e) Turn the engine switch off. (f) Disconnect the cable from the negative (-) battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. (g) Using a service wire, connect terminals 2 (BDL+) and 1 (BDL-) of connector E. NOTICE: Do not forcibly insert the service wire into the terminals of the connector when connecting the wire. (h) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(i) Disconnect the service wire from connector E. (j) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(b) Interchange the side airbag pressure sensor LH with RH and connect the connectors. (c) Connect the cable to the negative (-) battery terminal. (d) Turn the engine switch on (IG), and wait for at least 60 seconds. (e) Clear the DTCs stored in memory. Body Electrical > SRS Airbag > Clear DTCs(f) Turn the engine switch off. (g) Turn the engine switch on (IG), and wait for at least 60 seconds. (h) Check for DTCs. Body Electrical > SRS Airbag > Trouble CodesHINT: Codes other than DTCs B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.
(i) Turn the engine switch off. (j) Disconnect the cable from the negative (-) battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. (k) Return the side airbag pressure sensor LH and RH to their original positions and connect the connectors.
(b) Connect the cable to the negative (-) battery terminal. (c) Turn the engine switch on (IG). (d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(e) Turn the engine switch off. (f) Disconnect the cable from the negative (-) battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. (g) Using a service wire, connect terminals 1 (BDL+) and 2 (BDL-) of connector B. NOTICE: Do not forcibly insert the service wire into the terminals of the connector when connecting the wire. (h) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(i) Disconnect the service wire from connector B. (j) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Audio And Visual System(for Gasoline Model): Speaker Circuit
DESCRIPTION for 8 Speakers If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers. Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly, DCM (telematics transceiv ...
