1. Remove the left side kick panel.

1. Disconnect the under-dash fuse/relay box connectors D, E, H, I, J, K, N, P and X.

1. 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 4 .

1. With the connectors still disconnected from the under-hood fuse/relay box, make these input tests at the connector(s).
   - 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 5 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   H9 | BLK | Under all conditions | Check for continuity to ground:There should be continuity. |
   - Poor ground (G601)
   - An open in the wire
   P1 *1 P14 *2 | 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
   D6·J9·X34 | YEL | Ignition switch ON (II) | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   K4 | GRN/WHT | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 27 (20 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   X35 | WHT | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   N22 | LT BLU | Under all conditions | Check for continuity between terminal N22 and the climate control unit B (16P) connector terminal No. 14: There should be continuity. | An open in the wire
   Climate control unit B (16P) connector disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   J4 | BRN/RED | Under all conditions | Check for continuity between terminal J4 and power window master switch 23P connector terminal No. 16: There should be continuity. | An open in the wire
   Power window master switch 23P connector disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   D11 | BLU | Under all conditions | Check for continuity between terminal D11 and relay module J (10P) connector terminal No. 7: There should be continuity. | An open in the wire
   Relay module J (10P) connector disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   X27 | LT GRN | Under all conditions | Check for continuity between terminal X27 and wiper/washer switch 8P connector terminal No. 4: There should be continuity. | An open in the wire
   Wiper/washer switch 8P connector disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   N28 | WHT | Under all conditions | Check for continuity between terminal N28 and gauge assembly (30P) connector terminal No. 25: There should be continuity. | An open in the wire
   Gauge assembly B (30P) connector disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   G1 | GRN/RED | Under all conditions | Check for continuity between terminal G1 and power tailgate control unit connector A (26P) terminal No. 21: There should be continuity. | An open in the wire

   *1: | LHD type
   *2: | RHD type

1. 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, the multiplex integrated contorl unit must be faulty, replace the under-dash fuse/relay box assembly.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   P7 *1 P8 *2 | ORN | Under all conditions | Attach to ground: The ignition key light should come on. |
   - Blown No. 13 (20 A) fuse in the under-hood fuse/relay box
   - Blown LED
   - An open in the wire
   I4 | GRN/RED | Ceiling light switch in the middle position, all doors closed | Attach to ground: The ceiling light should come on. |
   - Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box
   - Faulty ceiling light
   - An open in the wire

   *1: | LHD type
   *2: | RHD type