MICU Input Test
WARNING: This page is about a different variant/trim than selected.
NOTE:
- Before testing the entry lights control system, troubleshoot the system using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If any fuse is blown, replace it and go to step 2.
- Turn the ignition switch to LOCK (0).
- Disconnect driver's under-dash fuse/relay box connectors E, F, K, R, and T.NOTE: All connector views are shown from wire side of female terminals.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- 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.
- With the connectors still disconnected, make these input tests at the connector.
- 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.
WIRE CAVITY TABLECavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained K4 PNK With the ceiling light switch in the middle position Attach to ground:
The ceiling light and front individual map lights (with moonroof) should come on.- Blown No. 22 (7.5 A) fuse in the under-hood fuse/relay box
- Blown bulb(s)
- Faulty ceiling light
- Faulty front individual map light
- An open in the wire
- Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connector.
- 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.
WIRE CAVITY TABLECavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained E6 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G602)
- An open in the wire
E33 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G601)
- An open in the wire
F20 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G401)
- An open in the wire
T34 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G501)
- An open in the wire
E2 GRY Right rear door open Measure the voltage to ground:
There should be less than 0.2 V.- Faulty right rear door switch
- An open in the wire
Right rear door closed Measure the voltage to ground:
There should about 5 V.- Faulty right rear door switch
- A short to ground in the wire
E3 LTGRN Front passenger's door open Measure the voltage to ground:
There should be less than 0.2 V.- Faulty front passenger's door switch
- An open in the wire
Front passenger's door closed Measure the voltage to ground:
There should about 5 V.- Faulty front passenger's door switch
- A short to ground in the wire
E17 BRN Left rear door open Measure the voltage to ground:
There should be less than 0.2 V.- Faulty left rear door switch
- An open in the wire
Left rear door closed Measure the voltage to ground:
There should about 5 V.- Faulty left rear door switch
- A short to ground in the wire
E37 GRN Driver's door open Measure the voltage to ground:
There should be less than 0.2 V.- Faulty driver's door switch
- An open in the wire
Driver's door closed Measure the voltage to ground:
There should about 5 V.- Faulty driver's door switch
- A short to ground in the wire
R6 PNK Ignition key inserted into the ignition switch Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G504)
- Faulty ignition key switch
- An open in the wire
Ignition switch to LOCK (0) and ignition key removed from the ignition switch Measure the voltage to ground:
There should about 5 V.- Faulty ignition key switch
- A short to ground in the wire
T23 WHT Driver's door lock knob switch unlocked Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G501)
- Faulty driver's door lock knob switch
- An open in the wire