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

Tester Connection

Condition

Specified Condition

2 (L) - 3 (E)

Always

10 kQ or higher

2 (L) - 4 (B)

A/C switch OFF

10 kQ or higher

3 (E) - 4 (B)

Always

10 kQ or higher

2 (L) - 4 (B)

A/C switch ON

Below 1 Q

5 (ILL+) - 6 (ILL-)

Always

Below 1 Q

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, 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

Switch Position

Tester Connection

Specified Condition

OFF

ALL - 5 (E)

10 kQ or higher

LO

9 (LO) - 5 (E)

Below 1 Q

LO - M1

9 (LO) - 5 (E) - 7 (M1)

Below 1 Q

M1

9 (LO) - 5 (E) - 7 (M1)

Below 1 Q

M1 - M2

9 (LO) - 5 (E) - 7 (M1) - 6 (M2)

Below 1 Q

M2

9 (LO) - 5 (E) - 6 (M2)

Below 1 Q

M2 - HI

9 (LO) - 5 (E) - 6 (M2) -10 (HI)

Below 1 Q

HI

9 (LO) - 5 (E) - 10 (HI)

Below 1 Q

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, replace the bulb.

Rr Defogger

Rr Defogger

MAX HOT

MAX COOL

ILL+

MAX HOT

ILL+

MAX-HOT

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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

Tester Connection

Condition

Specified Condition

2 (RrDEF) - 1 (E)

Rr. DEF switch OFF

10 kQ or higher

2 (RrDEF) - 1 (E)

Rr. DEF switch ON

Below 1 Q

3 (IG) - 6 (MAX HOT)

Except MAX HOT

10 kQ or higher

3 (IG) - 6 (MAX HOT)

MAX HOT

Below 1 Q

4 (ILL-) - 5 (ILL+)

Always

Below 1 Q

7 (V/B) - 8 (SG)

Always

Below 1 Q

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, replace the bulb.

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