Control Unit Input Test

SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the SRS section before performing repairs or service. See AIR BAG RESTRAINT SYSTEM.

1. Disconnect the 22P connector from the multiplex control unit, driver's, then remove the control unit from the driver's under-dash fuse/relay box.
2. Inspect the connectors and connector terminals to be sure they are all making good contact.
   • If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
   • If the terminals look OK, go to next step  3 .
   NOTE: If the shift lock solenoid clicks when the ignition switch is turned ON (II) while depressing the brake pedal with the shift lever in the [P] position, the shift lock system is OK. If the shift lever cannot be shifted from P  position, test the A/T gear position switch.
3. With the control unit still disconnected from its connectors and the fuse/relay box, make these input tests.
   • If a test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, go to step  4 .
   Fig 1: Identifying Multiplex Control Unit, Driver's, Connectors

   
   Fig 2: Multiplex Control Unit (Driver's) Input Test Table (1 Of 3)

   
   Fig 3: Multiplex Control Unit (Driver's) Input Test Table (2 Of 3)

   
4. Reconnect the connectors to the multiplex control unit, and make this input test.
   • If a test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, substitute a known-good multiplex control unit, and recheck the system.

     If the system is OK, the multiplex control unit, must be faulty; replace it.

   Fig 4: Multiplex Control Unit (Driver's) Input Test Table (3 Of 3)