Safety Indicator System (Multiplex Integrated Control Unit) Input Test

1. Before testing the safety indicator functions, troubleshoot the multiplex integrated control system test mode A. Multiplex Integrated Control Unit Remove the left kick panel (LHD type) or right kick panel (RHD type). Disconnect the under-dash fuse/relay box connectors E, H and P. NOTE: All connectors are wire side of female terminals. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, are recheck the system. If the terminals look OK, go to Step 5 . Reconnect the connectors to the under-dash fuse relay box, and make sure these input tests at the appropriate connectors on the under-dash fuse/relay box. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to Step 6 .
   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   E15 | GRN | Driver's door open | Check for voltage to ground: There should be 1 V or less. | Faulty driver's door switch An open in the wire
   Driver's door closed | Check for voltage to ground: There should be 5 V or more. | Faulty driver's door switch Short to ground
   H12 | LT GRN/RED | Front passenger's door open | Check for voltage to ground: There should be 1 V or less. | Faulty front passenger's door switch An open in the wire
   Front passenger's door closed | Check for voltage to ground: There should be 5 V or more. | Faulty front passenger's door switch Short to ground
   E14 | GRN/YEL | Left rear door open | Check for voltage to ground: There should be 1 V or less. | Faulty left rear door switch An open in the wire
   Left rear door closed | Check for voltage to ground: There should be 5 V or more. | Faulty left rear door switch Short to ground
   H13 | GRN/WHT | Right rear door open | Check for voltage to ground: There should be 1 V or less. | Faulty right rear door switch An open in the wire
   Right rear door closed | Check for voltage to ground: There should be 5 V or more. | Faulty right rear door switch Short to ground
   P24 *1 P21 *2 | PNK *1 orLT GRN *2 | Trunk lid open | Check for voltage to ground: There should be 1 V or less. | Poor ground (G701) Faulty trunk latch switch An open in the wire
   Trunk lid closed | Check for voltage to ground: There should be 5 V or more. | Faulty trunk latch switch Short to ground
   *1: | LHD type
   *2: | RHD type
Perform the gauge self diagnostic procedure. Do the indicators flash, go to Step 7 . Do the indicators not flash, replace the gauge control module. Substitute a known-good under-dash fuse/relay box and recheck the system. If the symptom is gone, the MICU is faulty; replace the under-dash fuse/relay box. If the symptom is still present, the gauge control module must be faulty; replace the gauge control module. |