Control Assembly: Testing and Inspection

AIR CONDITIONING PANEL:

INSPECTION

1. INSPECT AIR CONDITIONING CONTROL ASSEMBLY





(a) Check the blower switch resistance.
(1) Using an ohmmeter, measure the resistance and check the results in accordance with the values in the table below.
Standard:





If the result is not as specified, replace the air conditioning control assembly.





(b) Check the temperature selector switch voltage.
(1) Apply battery voltage (13.5V) across terminals 10 (IG) and 9 (GND).
(2) Connect the positive (+) tester probe of a voltmeter to terminal 6 (AMSW) and the negative (-) tester probe to terminal 9 (GND), then check the voltage.
Standard:





If the result is not as specified, replace the air conditioning control assembly.





(c) Check the mode selector switch voltage.
(1) Apply battery voltage (13.5V) across terminals 10 (IG) and 9 (GND).
(2) Connect the positive (+) tester probe of a voltmeter to terminal 5 (MSET) and the negative (-) tester probe to terminal 9 (GND), then check the voltage.
Standard:





If the result is not as specified, replace the air conditioning control assembly.





(d) Inspect the illumination operation.
(1) Connect the positive (+) lead from the battery to terminal 3 (ILL+) and negative (-) lead to terminal 8 (ILL-), then check that the illuminations light up.
Standard:
Illuminations light up
If the result is not as specified, check the faulty bulb.





(e) Inspect the bulb.
(1) Inspect continuity of the bulb by connecting the tester as shown in the illustration.
Standard:
7 to 11 Ohms at 20°C (68°F)
If continuity exists, replace the heater control.
If no continuity exists, replace the bulb.
(f) Inspect A/C indicator operation.





(1) Connect the positive (+) lead from the battery to terminal 10 (IG) and negative (-) lead to terminal 2 (ACID) and 9 (GND).
(2) Push the A/C button in and then check that the indicator lights up.
Standard:
Indicator lights up
If the result is not as specified, replace the air conditioning control assembly.





(3) Under the above condition, connect the positive (+) lead from the battery to terminal 3 (ILL+) and then check that the indicator dims.
Standard:
Indicator dims
If the result is not as specified, replace the air conditioning control assembly.
(g) Inspect the REC indicator operation.





(1) Connect the positive (+) lead from the battery to terminal 10 (IG) and negative (-) lead to terminal 4 (REC) and 9 (GND).
(2) Push the REC button in and then check that the indicator lights up.
Standard:
Indicator lights up
If the result is not as specified, replace the air conditioning control assembly.





(3) Under the above condition, connect the positive (+) lead from the battery to terminal 3 (ILL+) and then check that the indicator dims.
Standard:
Indicator dims
If the result is not as specified, replace the air conditioning control assembly.