Safety Indicator System (MICU and Gauge Control Module) Input Test (2016 2017 2018 2019 2020)

NOTE:

Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A .
Before testing, do the gauge control module self-diagnostic function to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
Before testing, make sure the No. C16 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. D11 (10 A) fuse in the driver's under-dash fuse/relay box is OK.

MICU

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect driver's under-dash fuse/relay box connectors E, G, H, N, and P

.NOTE: All connector views are shown from the wire side of the female terminals.

Courtesy of HONDA, U.S.A., INC.

3. Inspect the connectors 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 are OK, go to step 4.

4. Reconnect the connectors to the driver's under-dash fuse/relay box, 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 results not obtained
G3	BRN	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G502) An open or high resistance in the ground wire
H1	BRN	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G502) An open or high resistance in the ground wire
P2	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
N4	PUR	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
N4	PUR	Driver's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door switch A short to ground in the wire
N2	RED	Front passenger's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty front passenger's door switch Faulty front passenger's door switch ground An open or high resistance in the wire
N2	RED	Front passenger's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty front passenger's door switch A short to ground in the wire
E26	LT GRN	Left rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty left rear door switch Faulty left rear door switch ground An open or high resistance in the wire
E26	LT GRN	Left rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty left rear door switch A short to ground in the wire
E43	BRN	Right rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire
E43	BRN	Right rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty right rear door switch A short to ground in the wire
E23	WHT	Trunk lid open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty trunk lid latch switch Poor ground (G706) or an open in the ground wire An open or high resistance in the wire
E23	WHT	Trunk lid closed	Measure the voltage to ground: There should be about 5 V.	Faulty trunk lid latch switch A short to ground in the wire

Gauge Control Module

5. Turn the vehicle to the OFF (LOCK) mode.

6. Disconnect gauge control module connector A (32P)

Courtesy of HONDA, U.S.A., INC.

7. 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 are OK, go to step 8.

8. Reconnect the connector, 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 9.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired results not obtained
A1	PNK	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. C16 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
A2	TAN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. D11 (10 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire
A16	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire

9. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the gauge control module .