Gauge Control Module Input Test (2015-17)

NOTE:

Before testing, do the gauge control module self-diagnostic function - Refer to: Gauges Self-Diagnostic Function (Without SH-AWD), or Gauges Self-Diagnostic Function (With SH-AWD) , 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 A - Initial Communication and DTC Checks (2015-17) .
Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. B5 (7.5 A) fuse in the under-dash fuse/relay box is OK.

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

2. Disconnect the gauge control module 32P connector.

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
13	ORN	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
14	RED	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
18	BLU	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
17	ORN	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
12	LT GRN	Electric parking brake control unit 30P connector disconnected	Check for continuity between terminal 12 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 result is not obtained
1	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
2	BRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B5 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
16	BRN	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G306) An open or high resistance in the ground wire
32	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G305) An open or high resistance in the ground wire
11	GRN	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	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 (G204) or an open in the ground wire An open or high resistance in the wire
19	PNK	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 (G304) or an open in the ground wire An open or high resistance in the wire
19	PNK	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
20	RED	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 (G304) or an open in the ground wire An open or high resistance in the wire
20	RED	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
10	PUR	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
10	PUR	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 (G204) or an open in the ground wire An open or high resistance in the wire