DISPLAY GP-MONITOR 2912199 - Caterpillar

Illustration 1 g00333238
(1) On/Off switch (2) Automatic temperature control switch (3) Air conditioning override switch (4) Temperature selection switch (increase) (5) Temperature selection switch (decrease) (6) Preset temperature display (7) Indicator display (fan speed) (8) Fan speed override switch (decrease) (9) Fan speed override switch (increase) (10) Air inlet selection switch (fresh air) (11) Air inlet selection switch (recirculated air) (12) Air outlet selection switch (defroster) (13) Air outlet selection switch (under seat) (14) Air outlet selection switch (upper body and under seat) (15) Air outlet selection switch (upper body)
Illustration 2 g00781373
(1) Fan speed knob and Power on switch (2) Automatic temperature control switch (3) Air outlet selection switch (4) Fresh air control (5) Temperature control knob (6) Display
If your machine is equipped with the control panel in illustration 1, refer to step 2. If your machine is equipped with the control panel in illustration 2, refer to step 4.
Press the temperature selection switch (increase) (4), the temperature selection switch (decrease) (5) and the "AUT" switch (2) simultaneously. This will start the diagnostic mode. Display the parameter value that corresponds to the questionable sensor. Continue to step 3.
Parameters are selected by using the fan speed override switch (increase) (9) and the fan speed override switch (decrease) (8). Continue to step 6.
Press the temperature control knob (5), and the automatic temperature control switch (2) simultaneously. This will start the diagnostic mode. Continue to step 5.
Parameters are selected by holding down both the automatic temperature control switch (2) and the fan speed knob (1). Continue to step 6.
Choose the sensor that needs to be tested. Refer to table 1 for a list of relative parameters.
Table 1
Parameter Value    Sensor    
"P03"     Cab air temperature sensor    
"P05"     Temperature sensor (ambient air)(fresh air)    
"P07"     Coolant temperature sensor (water)    
"P08"     Temperature sensor (evaporator coil)    
Check the sensor reading.Expected Result: The reading is correct.Results:
OK - The sensor is good.
NOT OK - Proceed to step 8 for parameters "P05" and "P08". Proceed to step 9 for parameters "P03" and "P07".
Check the resistance of the sensor. Compare the resistance value to