Gauge Control Module Input Test
NOTE:
Make sure the fuses associated with the system is OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, do the gauge control module self-diagnostic function, and make sure the B-CAN communication lines are OK.

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)
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.
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
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
A17
BRN
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
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
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
A11
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
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 (G251) or an open in the ground wire
An open or high resistance in the wire
A8
GRN
Vehicle ON mode, ECON switch pressed
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty ECON switch
Poor ground (G402) or an open in the ground wire
An open or high resistance in the wire
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
A24*
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
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 (G251) or an open in the ground wire
An open or high resistance in the wire
*: with washer fluid level switch