Gauge Control Module Input Test

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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
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 (10 A) fuse in the under-dash fuse/relay box is OK.

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

2. Disconnect the following connector.

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 result is not obtained
A15	GRN	Combination light switch ON	Connect to ground with a jumper wire: The dashlights should come on full bright.	Faulty LEDs Faulty bulbs An open or high resistance in the wire
A16	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
A9	BRN	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
A10	GRN	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
A5^*	GRY	Disconnect the outside air temperature sensor 2P connector	Check for continuity between terminal No. 5 and outside air temperature sensor 2P connector terminal No. 2: There should be continuity.	An open or high resistance in the wire
A5^*	GRY	Disconnect the outside air temperature sensor 2P connector	Check for continuity between terminal No. 5 and body ground: There should be no continuity.	A short to ground in the wire
A6	PNK	Disconnect the outside air temperature sensor 2P connector	Check for continuity between terminal No. 6 and outside air temperature sensor 2P connector terminal No. 1: There should be continuity.	An open or high resistance in the wire
A6	PNK	Disconnect the outside air temperature sensor 2P connector	Check for continuity between terminal No. 6 and body ground: There should be no continuity.	A short to ground in the wire

*: Without climate control

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
A1	RED	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 An open or high resistance in the wire
A17	LT GRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B5 (10 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
A4	BRN	In all ignition switch positions or 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

*: With washer fluid level switch

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A32	BRN	In all ignition switch positions or 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
A2	PUR	Vehicle ON mode, ECON switch pushed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty ECON switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
A2	PUR	Vehicle ON mode, ECON switch released	Measure the voltage to ground: There should be battery voltage.	Faulty ECON switch A short to ground in the wire
A25	GRY	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
A25	GRY	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 (G402) or an open in the ground wire An open or high resistance in the wire
A26	BLU	Vehicle ON mode, parking brake pedal pressed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty parking brake switch Faulty parking brake switch ground An open or high resistance in the wire
A26	BLU	Vehicle ON mode, parking brake pedal released	Measure the voltage to ground: There should be battery voltage.	Faulty parking brake switch A short to ground in the wire
A27^*	YEL	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
A27^*	YEL	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 (G202) or an open in the ground wire An open or high resistance in the wire

*: With washer fluid level switch