DESCRIPTION When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to terminals +B and +B2 of the ECM. WIRING DIAGRAM ![]() PROCEDURE
(a) Remove the IG2 MAIN fuse, EFI NO. 1 fuse and IGN fuse from the engine room relay block. (b) Remove the AM2 fuse from the driver side junction block. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
![]() (a) Remove the integration relay from the engine room relay block. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
![]() (a) Disconnect the ECM connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
![]() (a) Disconnect the ECM connectors. (b) Turn the ignition switch to ON. (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Disconnect the ECM connector. (b) Disconnect the ignition switch connector. (c) Disconnect the cable from the battery negative (-) terminal. (d) Disconnect the cable from the battery positive (+) terminal. (e) Remove the AM2 fuse and integration relay. (f) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Inspect the ignition switch (See page
(a) Disconnect the ECM connector. (b) Disconnect the cable from the battery negative (-) terminal. (c) Disconnect the cable from the battery positive (+) terminal. (d) Remove the integration relay from the engine room relay block. (e) Disconnect the integration relay connectors. (f) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Front Seat Side Airbag Assembly(for Power Seat): On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK FRONT SEAT AIRBAG ASSEMBLY LH (VEHICLE NOT INVOLVED IN COLLISION) (a) Perform a diagnostic system check (see page ). (b) With the front seat airbag assembly LH installed on the vehicle, perform a visual check. If there are any defects as mentioned below, repl ...