AC-2
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Basic Diagnostics Procedure
1. Basic Diagnostics Procedure
A: PROCEDURE
Step Check Yes No
1 START INSPECTIONS.
1) Perform the pre-inspection. <Ref. to AC-3,
INSPECTION, General Description.>
2) Perform the self-diagnosis. <Ref. to AC-9,
OPERATION, Diagnostic Chart for Self-Diag-
nosis.>
Does the self-diagnosis oper-
ate?
Go to step 2. <Ref. to AC-12, A/
C OR SELF-DIAG-
NOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
2 IDENTIFY MALFUNCTION PART.
Identify the malfunction part with self-diagno-
sis.
Can the malfunction part be
identified?
Repair the mal-
function part in
accordance with
each diagnostic
chart.
Go to step 3.
3 CHECK COMPARTMENT TEMPERATURE.
1) Turn ON the A/C switch.
2) Turn the temperature control dial at maxi-
mum cool position.
3) Check the compartment temperature
change.
Does the compartment tem-
perature change?
Go to step 4. <Ref. to AC-16,
COMPARTMENT
TEMPERATURE
DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>
4 CHECK A/C SYSTEM RESPONSE.
Change the temperature setting, and check the
response of A/C system.
Does the A/C system respond
quickly?
A/C system is nor-
mal.
<Ref. to AC-16,
COMPARTMENT
TEMPERATURE
DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>
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