Gauge Control Module (2019 2020 2021)

NOTE: 

• Before testing, do the gauge control module self-diagnostic function and make sure the B-CAN communication lines are OK. - Go to: Gauges Self-Diagnostic Function (2019 2020 2021) 
• 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 A - Initial Communication and DTC Checks .

• Before testing, make sure the following fuses are OK. Refer to:

  No. A26 - Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021)

  No. C29*2 - Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021)

  No. D1*1 - Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021)

*1: With auto idle stop system

*2: Without auto idle stop system

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

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

Gauge Control Module Connector A (32P) (female terminals) 

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 result is not obtained
A15	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
A16	BLU	Combination light switch ON	Connect to ground with a jumper wire:   The dashlights should come on full bright.	Blown bulbs An open or high resistance in the wire
A6	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
		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

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 - Removal and Installation .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	WHT	Under all conditions	Measure the voltage to ground:   There should be battery voltage.	Blown No. A26 fuse - Go to: Fuse to Components Index (Without Auto Idle Stop System) (2019 2020 2021) An open or high resistance in the wire
A17	GRN	Vehicle ON mode	Measure the voltage to ground:   There should be battery voltage.	Blown No. D1 fuse*1 - Go to: Fuse to Components Index (Without Auto Idle Stop System) (2019 2020 2021) Blown No. C29 fuse*2 - Go to: Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021) An open or high resistance in the wire
A4	BLK	In all power modes	Measure the voltage to ground:   There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
A32	BRN	In all power modes	Measure the voltage to ground:   There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
A11	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
		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 (G301) or an open in the ground wire An open or high resistance in the wire
A28	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 (G402) or an open in the ground wire An open or high resistance in the wire
		Vehicle ON mode, dashlights brightness control ILLUMI (-) button released	Measure the voltage to ground:   There should be battery voltage.	Faulty dashlights brightness control switch A short to ground in the wire
A3	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 (G402) or an open in the ground wire An open or high resistance in the wire
		Vehicle ON mode, dashlights brightness control ILLUMI (+) button released	Measure the voltage to ground:   There should be battery voltage.	Faulty dashlights brightness control switch A short to ground in the wire
A8	BLU	Vehicle ON mode, ECON switch ON	Measure the voltage to ground:   There should be less than 0.2 V	Faulty ECON switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Vehicle ON mode, ECON switch OFF	Measure the voltage to ground   There should be battery voltage.	Faulty ECON switch A short to ground in the wire
A27	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
		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

*1: With auto idle stop system

*2: Without auto idle stop system