Gauge Control Module Input Test (2024 2025)

NOTE:

Before testing, do the gauge control module self-diagnostic function - Refer to: Gauges Self-Diagnostic Function (2024 2025) , 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 - Refer to: BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B - CONTROL UNIT NOT COMMUNICATING (2021 2022 2023 2024 2025) .
Before testing, make sure the fuses associated with the system is OK.

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

2. Disconnect the gauge control module 32P connector.

GAUGE CONTROL MODULE 32P CONNECTOR (female terminals)

Courtesy of HONDA, U.S.A., 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 are OK, go to step 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 result is not obtained
15	RED	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
10	YEL	Parking brake pedal pressed	Check for continuity to ground:There should be continuity.	Faulty parking brake switch An open or high resistance in the wire
10	YEL	Parking brake pedal released	Check for continuity to ground:There should be no continuity.	Faulty parking brake switch A short to ground in the wire

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, GAUGE CONTROL MODULE REMOVAL AND INSTALLATION .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
1	WHT	Under all conditions	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire
17	GRN	Vehicle ON mode	Measure the voltage to ground:There should be battery voltage.	An open or high resistance in the wire
4	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground An open or high resistance in the ground wire
32	BRN	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground An open or high resistance in the ground wire
11	PNK	Vehicle ON mode, brake fluid is at full level in the reservoir	Measure the voltage to ground:There should be battery voltage.	Faulty brake fluid level switch A short to ground in the wire
11	PNK	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 or an open in the ground wire An open or high resistance in the wire
8	BLU	Vehicle ON mode, ECON mode ON	Measure the voltage to ground:There should be less than 0.2 V	Faulty ECON switch Poor ground or an open in the ground wire An open or high resistance in the wire
8	BLU	Vehicle ON mode, ECON mode OFF	Measure the voltage to ground:There should be battery voltage.	Faulty ECON switch A short to ground in the wire
24*	GRY	Vehicle ON mode, washer fluid is half or more in the washer reservoir	Measure the voltage to ground:There should be battery voltage.	Faulty washer fluid level switch A short to ground in the wire
24*	GRY	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 or an open in the ground wire An open or high resistance in the wire

*: With washer fluid level switch