Gauge Control Module Input Test (2016 2017 2018 2019 2020)

NOTE:

Before testing, do the gauge control module self-diagnostic function , and make sure the B-CAN communication lines are OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
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.

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

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

Courtesy of HONDA, U.S.A., 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 are OK, go to step 4.

4. With the connector still disconnected, 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
A13	PUR	Combination light switch ON	Connect to ground with a jumper wire: The dashlights should come on full bright.	Faulty LEDs An open or high resistance in the wire
A14	WHT	Combination light switch ON	Connect to ground with a jumper wire: The dashlights should come on full bright.	Faulty bulbs An open or high resistance in the wire
A18	RED	Vehicle ON mode, turn signal switch to LEFT	Measure the voltage to ground: There should be battery voltage when the lights are flashing.	Faulty MICU Faulty combination light switch An open or high resistance in the wire
A17	BLU	Vehicle ON mode, turn signal switch to RIGHT	Measure the voltage to ground: There should be battery voltage when the lights are flashing.	Faulty MICU Faulty combination light switch An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired results not obtained
A12	RED	Electric parking brake control unit 30P connector disconnected	Check for continuity between terminal A12 and the electric parking brake control unit 30P connector terminal No. 17: There should be continuity.	An open or high resistance in the wire

5. 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, replace the gauge control module .

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 Faulty driver's under-dash 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
A32	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
A11	GRN	Vehicle ON mode, brake fluid is at full level in the reservoir	Measure the voltage to ground: There should be about 5 V.	Faulty brake fluid level switch A short to ground in the wire
A11	GRN	Vehicle ON mode, brake fluid is at lower level in the reservoir	Measure the voltage to ground: There should be less than 0.2 V.	Faulty brake fluid level switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
A19	LT GRN	Vehicle ON mode, dashlights brightness control ILLUMI (+) button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty dashlights brightness control switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
A19	LT GRN	Vehicle ON mode, dashlights brightness control ILLUMI (+) button released	Measure the voltage to ground: There should be about 5 V.	Faulty dashlights brightness control switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired results not obtained
A20	BLU	Vehicle ON mode, dashlights brightness control ILLUMI (-) button pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty dashlights brightness control switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
A20	BLU	Vehicle ON mode, dashlights brightness control ILLUMI (-) button released	Measure the voltage to ground: There should be about 5 V.	Faulty dashlights brightness control switch A short to ground in the wire
A10	TAN	Vehicle ON mode, washer fluid is half or more in the washer reservoir	Measure the voltage to ground: There should be about 5 V.	Faulty washer fluid level switch A short to ground in the wire
A10	TAN	Vehicle ON mode, washer fluid is empty in the washer reservoir	Measure the voltage to ground: There should be less than 0.2 V.	Faulty washer fluid level switch Poor ground (G201) or an open in the ground wire An open or high resistance in the wire