Entry Light Control System (Multiplex Integrated Control Unit and Door Multiplex Control Unit) Input Test

1. Before testing the entry light control functions, troubleshoot the multiplex integrated control system test mode A. Multiplex Integrated Control Unit Remove the left kick panel. Disconnect the under-dash fuse/relay box connectors. NOTE: All connectors are wire side of female terminals. Inspect the 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 Step 5 . With the connectors still disconnected, make these input tests at the connector. If any test indicates a problem, find and correct the cause, the 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
   --- | --- | --- | --- | ---
   P1 (P14) | BRN | Under all conditions | Check for continuity to ground: There should be continuity. | Poor ground (G502) An open in the wire
   E9 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. | Poor ground (G601) An open in the wire
   P7 (P8) | ORN | Under all conditions | Attach to ground: Ignition key light should come on. | Blown No. 13 (20 A) fuse in the under-hood fuse/relay box Faulty ignition keylight (LED) An open in the wire
   I4 | GRN/RED | Ceiling light switch in middle position | Attach to ground: Ceiling light(s) should come on. | Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box Blown bulb Faulty ceiling light An open in the wire
   ( ): RHD type
1. Reconnect the connectors to the under-dash fuse/relay box, and make 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 7 .
   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 or (right) 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 or (right) 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 or (left) 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 or (left) rear door closed | Check for voltage to ground: There should be 5 V or more. | Faulty right rear door switch Short to ground
   P13 (P2) | RED/WHT | Ignition key inserted into the ignition switch | Check for voltage to ground: There should be 1 V or less. | Poor ground (G501) Faulty ignition key switch An open in the wire
   Ignition key removed from the ignition switch | Check for voltage to ground: There should be 5 V or more. | Faulty ignition key switch Short to ground
   ( ): RHD type

1. Door Multiplex Control Unit Remove the driver's door panel. Disconnect the 23P connector from the door multiplex control unit. 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, and recheck the system. If the terminals look OK, go to Step 10 . Reconnect the connector to the door multiplex control unit, and make these input tests at the appropriate connector. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it.
   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   22 | YEL/RED | Driver's door lock knob locked | Check for voltage to ground: There should be 1 V or less. | Faulty driver's door lock actuator Poor ground (G501 or G601)
   Drive's door lock knob unlocked | Check for voltage to ground: There should be 5 V or more. | Faulty driver's door lock actuator Short to ground
   8 | WHT/RED | Driver's door key cylinder switch in LOCK | Check for voltage to ground: There should be 1 V or less. | Faulty driver's door key cylinder switch Poor ground (G501 or G601) An open in the wire Short to ground
   Driver's door key cylinder switch in the neutral position | Check for voltage to ground: There should be 5 V or more.
   Driver's door key cylinder switch in UNLOCK | Check for voltage to ground: There should be 5 V or more.
   21 | WHT | Driver's door key cylinder switch in UNLOCK | Check for voltage to ground: There should be 1 V or less. | Faulty driver's door key cylinder switch Poor ground (G501) An open in the wire Short to ground
   Driver's door key cylinder switch in the neutral position | Check for voltage to ground: There should be 5 V or more.
   Driver's door key cylinder switch in LOCK | Check for voltage to ground: There should be 5 V or more.
   7 | WHT/BLK | Driver's door lock knob unlocked | Check for voltage to ground: There should be 1 V or less. | Faulty driver's door lock actuator Poor ground (G501 or G601) An open in the wire
   Driver's door lock knob locked | Check for voltage to ground: There should be 5 V or more. | Faulty driver's door lock actuator Short to ground