MICU Input Test
- Before troubleshooting the multiplex integrated control system, refer to B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Check the No. 10 (7.5A) fuse in the under-dash fuse/relay box. If any fuse is blown, replace it and go to step 3.
- Disconnect under-dash fuse/relay box connectors E, F, G, K, 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 5.
- With the connector still disconnected, 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, go to step 6.
PROBLEM SYMPTOM CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained K4 PNK Under all conditions Attach to ground: The ceiling light should come on. - Blown No. 22 (7.5 A) fuse in the under-hood fuse/relay box
- Blown bulb(s)
- Faulty ceiling light
- An open in the wire
- Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connectors.
- 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.
PROBLEM SYMPTOM CHARTCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained G2 GRN Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
- An open in the wire
E6 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G601)
- An open in the wire
E33 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G601)
- An open in the wire
F20 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G451)
- An open in the wire
T34 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G501)
- An open in the wire