DESCRIPTION The front passenger squib circuit consists of the airbag ECU assembly and instrument panel passenger airbag assembly. The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met. These DTCs are stored when a malfunction is detected in the front passenger squib circuit.
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
HINT:
PROCEDURE
(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 instrument panel passenger airbag assembly and airbag ECU assembly. Also check that the connectors that link the instrument panel wire and No. 2 instrument panel wire are properly connected. OK: The connectors are properly connected. HINT: If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection. (d) Disconnect the connectors from the instrument panel passenger airbag assembly and airbag ECU assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire. (e) Check that the terminals of the connectors are not deformed or damaged. OK: The terminals are not deformed or damaged. (f) Check that the No. 2 instrument panel wire connector (on the instrument panel passenger airbag assembly side) is not loose, deformed or damaged. OK: The airbag connector locking button is not disengaged, and the claw of the lock is not deformed or damaged. (g) Check that the short springs of the activation prevention mechanisms of the instrument panel wire connector and No. 2 instrument panel wire connector are not deformed or damaged. OK: The short springs are not deformed or damaged.
(b) Connect SST (resistance 2.1 Ω) to connector E (orange connector). CAUTION: Never connect a tester to the instrument panel passenger airbag assembly for measurement, as this may lead to a serious injury due to airbag deployment. NOTICE:
SST: 09843-18061 (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 CodesOK: DTC B1805, B1806, B1807 or B1808 is not output. HINT: Codes other than DTCs B1805, B1806, B1807 and B1808 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) Disconnect SST from connector E.
(b) Check for a short to B+ in the circuit. (1) Connect the cable to the negative (-) battery terminal. (2) Turn the engine switch on (IG). (3) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(4) Turn the engine switch off. (5) 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 for an open in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(d) Check for a short to ground in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(e) Check for a short in the circuit. (1) Release the activation prevention mechanism built into connector B. Click here (2) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(3) Restore the released activation prevention mechanism of connector B to the original condition.
(b) Connect the cable to the negative (-) battery terminal. (c) Turn the engine switch on (IG), and wait for at least 60 seconds. (d) Clear the DTCs stored in memory. Body Electrical > SRS Airbag > Clear DTCs(e) Turn the engine switch off. (f) Turn the engine switch on (IG), and wait for at least 60 seconds. (g) Check for DTCs. Body Electrical > SRS Airbag > Trouble CodesOK: DTC B1805, B1806, B1807 or B1808 is not output. HINT: Codes other than DTCs B1805, B1806, B1807 and B1808 may be output at this time, but they are not related to this check.
(b) Check for a short to B+ in the circuit. (1) Connect the cable to the negative (-) battery terminal. (2) Turn the engine switch on (IG). (3) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(4) Turn the engine switch off. (5) 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 for an open in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(d) Check for a short to ground in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(e) Check for a short in the circuit. (1) Release the activation prevention mechanism built into connector B. Click here (2) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(3) Restore the released activation prevention mechanism of connector B to the original condition.
(b) Check for an open in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(c) Check for a short to ground in the circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(d) Check for a short in the circuit. (1) Release the activation prevention mechanism built into connector D. Click here (2) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(3) Restore the released activation prevention mechanism of connector D to the original condition.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Throttle Body: Inspection
INSPECTION PROCEDURE 1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 5 (M-) - 6 (M+) 20°C (68°F) 0.3 to 100 Ω If the result is not as specified, replace the t ...
