Control Unit Input Test

MICU (Common Test) 

1. Turn the ignition switch to LOCK (0) and remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
2. Disconnect under-dash fuse/relay box connectors E, H, P and Q.
   NOTE: All connector views are wire side of female terminals.
   Fig 1: Identifying Under-Dash Fuse/Relay Box Connectors E (16P) Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 2: Identifying Under-Dash Fuse/Relay Box Connectors P (30P) Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 3: Identifying Under-Dash Fuse/Relay Box Connectors H (14P) Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 4: Identifying Under-Dash Fuse/Relay Box Connectors Q (14P) Terminals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. 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.
4. Reconnect the connectors, turn the ignition switch to ON (11), and do the following input tests:
   • 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 desired result is not obtained
   E9	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G601) or an open in the ground wire An open or high resistance in the wire
   H9
   Q4
   P1	BRN	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G502) or an open in the ground wire An open or high resistance in the wire

   GAUGE CONTROL MODULE (Common Test) 

5. Disconnect gauge control module connectors A (12P) and B (24P).
   NOTE: All connector views are wire side of female terminals.
   Fig 5: Identifying Gauge Control Module Connector A (12P)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 6: Identifying Gauge Control Module Connector B (24P)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
6. 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 7.
7. Reconnect the connectors, turn the ignition switch to ON (II), and do the following input tests:
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, go to the appropriate input test.
     • Key-in reminder, go to step 8.
     • Parking brake reminder, go to step  9.
     • Lights-on reminder, do the combination switch control unit input test (see WIPER/WASHER SWITCH (COMBINATION SWITCH CONTROL UNIT) INPUT TEST ) and the combination light switch test (see COMBINATION LIGHT SWITCH TEST/REPLACEMENT ).
     • Seat belt reminder, check for SRS DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).
     • Low battery voltage reminder, do the battery sensor input test (see BATTERY SENSOR INPUT TEST ).

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   A2	BLK	In all ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
   A1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 4 (40 A) fuse in the main under-hood fuse box Blown No. 7 (10 A) fuse in the under-dash fuse/relay box Faulty main under-hood fuse box Faulty under-dash fuse/relay box An open or high resistance in the wire
   A7	YEL	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire

   Key-in reminder 

8. Reconnect the under-dash fuse/relay box connectors, turn the ignition switch to ON (II), and do the following input tests:
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, the MICU must be faulty, replace the under-dash fuse/relay box (see REMOVAL AND INSTALLATION ).

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   P13	PNK	Ignition key inserted into the ignition switch	Measure the voltage to ground: There should be less than 0.2 V.	Faulty ignition key switch Poor ground (G601) or an open in the ground wire An open or high resistance in the wire
   		Ignition switch in LOCK (0) position and the ignition key removed from the ignition switch	Measure the voltage to ground: There should be at least 5 V.	Faulty ignition key switch A short to ground in the wire
   E15	GRN	Driver's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door switch Faulty driver's door switch ground An open or high resistance in the wire
   		Driver's door closed	Measure the voltage to ground: There should be at least 5 V.	Faulty driver's door switch Faulty driver's door switch ground A short to ground in the wire

   Parking Brake Reminder 

9. Reconnect the gauge control module connectors, turn the ignition switch to ON (II), and do the following input tests:
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).