Control Assembly: Testing and Inspection

AIR CONDITIONING: AIR CONDITIONING PANEL ASSEMBLY: INSPECTION

1. INSPECT HEATER CONTROL BASE SUB-ASSEMBLY





(a) Check the heater control base resistance.

(1) Using an ohmmeter, measure the resistance and check the results in accordance with the values in the table below.

Standard resistance:





If the result is not as specified, replace the heater control base.

(b) Check the A/C indicator operation.

(1) Connect the positive (+) lead from the battery to terminal 2 (L) and the negative (-) lead to terminal (E).

(2) Push the A/C switch in and check that the indicator lights up.

Standard:

indicator lights up

If the result is not as specified, replace the heater control base.

(c) Check the illumination operation.

(1) Connect the positive (+) lead from the battery to terminal 5 (ILL+) and the negative (-) lead to terminal 6 (ILL-), then check that the bulb illuminates.

Standard:

Bulb illuminates

If the result is not as specified, check for faulty bulb.

(d) Inspect the bulb.





(1) Inspect continuity of the bulb by connecting the tester, as shown in the illustration.

Standard Resistance:

Continuity

If continuity exists, replace the heater control base.

If no continuity exists, replace the bulb.

2. INSPECT HEATER CONTROL SUB-ASSEMBLY





(a) Check the heater control resistance.

(1) Using an ohmmeter, measure the resistance and check the results in accordance with the values in the table below.

Standard resistance:





If the result is not as specified, replace the heater control.

(b) Check the illumination operation.

(1) Connect the positive (+) lead from the battery to terminal 2 (ILL+) and the negative (-) lead to terminal 1 (ILL-), then check that the bulb illuminates.

Standard:

Bulb illuminates

If the result is not as specified, check for faulty bulb.

(c) Inspect the bulb.





(1) Inspect continuity of the bulb by connecting the tester, as shown in the illustration.

Standard Resistance:

Continuity

If continuity exists, replace the heater control.

If no continuity exists, replace the bulb.

3. INSPECT NO. 3 HEATER CONTROL KNOB





(a) Check the No. 3 heater control knob resistance.

(1) Using an ohmmeter, measure the resistance and check the results in accordance with the values in the table below.

Standard resistance:





If the result is not as specified, replace the No. 3 heater control knob.

(b) Check the Rr. DEF indicator operation.

(1) Connect the positive (+) lead from the battery to terminal 3 (IG) and the negative (-) lead to terminal 1 (E).

(2) Push the Rr. DEF switch in and check that the indicator lights up.

Standard:

indicator lights up

If the result is not as specified, replace the No. 3 heater control knob.

(c) Check the illumination operation.

(1) Connect the positive (+) lead from the battery to terminal 5 (ILL+) and the negative (-) lead to terminal 4 (ILL-), then check that the bulb illuminates.

Standard:

Bulb illuminates

If the result is not as specified, check for faulty bulb.

(d) Inspect the bulb.





(1) Inspect continuity of the bulb by connecting the tester, as shown in the illustration.

Standard Resistance:

Continuity

If continuity exists, replace the No. 3 heater control knob.

If no continuity exists, replace the bulb.