Symptom Matrix Chart

Diagnostic Procedure 1:

SYMPTOM: Ambient sensor circuit is open or shorted. (21 or -21 is indicated on display as a result of conducting Self-diagnosis STEP 2.)

Diagnostic Procedure 2:

SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or -22 is indicated on display as a result of conducting Self-diagnosis STEP 2.)

Diagnostic Procedure 3:

SYMPTOM: Intake sensor circuit is open or shorted. (24 or -24 is indicated on auto amp. as a result of conducting Self-diagnosis STEP 2.)

Diagnostic Procedure 4:

SYMPTOM: Sunload sensor circuit is open or shorted. (25 or -25 is indicated on display as a result of conducting Self-diagnosis STEP 2.)

Diagnostic Procedure 5:

SYMPTOM: Either mode door motor or air mix door motor does not operate normally.

Diagnostic Procedure 6:

SYMPTOM: Mode door motor and air mix door motor do not operate normally.

Diagnostic Procedure 7 (Part 1 Of 2):

Diagnostic Procedure 7 (Part 2 Of 2):

SYMPTOM: Intake door motor does not operate normally.
- Perform Self-diagnosis STEPS 1, 2 and 4 before referring to the flow chart.

Diagnostic Procedure 8 (Part 1 Of 2):

Diagnostic Procedure 8 (Part 2 Of 2):

SYMPTOM: Blower motor operation is malfunctioning under out of Starting Fan Speed Control.
- Perform Preliminary Check 5 before referring to the following flow chart.

Diagnostic Procedure 9 (Part 1 Of 3):

Diagnostic Procedure 9 (Part 2 Of 3):

Diagnostic Procedure 9 (Part 3 Of 3):

SYMPTOM: Magnet clutch does not engage after performing Preliminary Check 6.
- Perform Preliminary Check 6 before referring to the flow chart.