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.
Before testing, make sure the No. A18 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. B7 (10 A) fuse in the under-dash fuse/relay box is OK.

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

2.
Disconnect gauge control module connector A (32P).
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
A10
PNK
Disconnect the VSA modulator-control unit 46P connector
Check for continuity between terminal No. A10 and VSA modulator-control unit 46P connector terminal No. 16:
There should be continuity.
An open or high resistance in the wire
A15
BLU
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*
TAN
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
*: With moonroof

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. A18 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
A17
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. B7 (10 A) fuse in the under-dash fuse/relay box
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 (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
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 (G302) or an open in the ground wire
An open or high resistance in the wire
A8*1
GRN
Vehicle ON mode, ECON button pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty ECON switch
Poor ground (G502) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, ECON button released
Measure the voltage to ground:
There should be battery voltage.
Faulty ECON switch
A short to ground in the wire
A8*2
BLU
Vehicle ON mode,
integrated drive-mode switch (?) pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty integrated drive-mode switch
Poor ground (G502) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode,
integrated drive-mode switch (?) released
Measure the voltage to ground:
There should be battery voltage.
Faulty integrated drive-mode switch
A short to ground in the wire
A25*2
WHT
Vehicle ON mode,
integrated drive-mode switch (?) pushed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty integrated drive-mode switch
Poor ground (G502) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode,
integrated drive-mode switch (?) released
Measure the voltage to ground:
There should be battery voltage.
Faulty integrated drive-mode switch
A short to ground in the wire
A24*3
BRN
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 (G302) or an open in the ground wire
An open or high resistance in the wire
*1: With ECON switch
*2: With integrated drive-mode switch
*3: Canada models