Mazda 6 2002 Workshop Manual page 1162

STEP
*9 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR CONTINUITY
• Turn ignition switch to LOCK position.
• Is there continuity between following climate
control unit connector (12-pin) terminal and
air intake actuator connector terminal?
— Terminal D —Terminal 2K (FRESH
signal)
— Terminal F —Terminal 2I
(RECIRCULATE signal)
*10 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR SHORT TO GROUND
• Is there continuity between following climate
control unit connector (12-pin) terminal and
ground?
— Terminal 2K (FRESH signal)
— Terminal 2I (RECIRCULATE signal)
*11 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR SHORT TO B+
• Turn ignition switch to ON position
• Test voltage at following climate control unit
connector (12-pin) terminal.
— Terminal 2K (FRESH signal)
— Terminal 2I (RECIRCULATE signal)
• Is voltage approimately 12 V?
12 INSPECT BLOWER UNIT AIR INTAKE DOOR
• Is there any foreign material or obstruction in
blower unit air intake door?
13 VERIFY THAT BLOWER UNIT AIR INTAKE
DOOR IS POSITIONED SECURELY AND
PROPERLY
• Is blower unit air intake door securely and
properly positioned?
14 VERIFY THAT MALFUNCTION SYMPTOM
OCCURS AFTER REPAIR
• Does malfunction disappear?
End Of Sie
NO.7 AIR FROM VENTS COLD ENOUGH
7 Air from vents not cold enough.
DESCRIPTION • Magnetic clutch operates but A/C system malfunctions.
• Drive belt malfunction (Step 2)
• Malfunction in blower unit or condenser (Steps 4, 5)
• Malfunction in receiver/drier or epansion valve (valve closes too much) (Steps 8, 9)
POSSIBLE
• Malfunction in refrigerant lines (Steps 10, 11)
CAUSE
• A/C compressor system malfunction, insufficient compressor oil (Steps 15, 16)
• Over filling of compressor oil, malfunction in epansion valve or A/C unit air mi link system (Steps 17—
19)
Diagnostic procedure
STEP
1 INSPECT DRIVE BELT
• Inspect drive belt.
(See B–3 DRIVE BELT
• Is it okay?
2 INSPECT REFRIGERANT SYSTEM
PERFORMANCE
• Perform refrigerant system performance test.
(See U–13 REFRIGERANT SYSTEM
PERFORMANCE
• Is operation normal?
U–72
TROUBLESHOOTING
INSPECTION
INSPECTION
INSPECTION)
TEST)
Yes Go to net step.
No Repair wiring harness between climate control unit and air
intake actuator, then go to Step 14.
Yes Repair wiring harness between climate control unit and air
intake actuator, then go to Step 14.
No Go to net step.
Yes Repair wiring harness between climate control unit and air
intake actuator, then go to Step 14.
No Replace climate control unit, then go to Step 14.
Yes Remove obstruction, then go to Step 14.
No Go to net step.
Yes Inspect air intake door for cracks or damage, then go to net
step.
No Install air intake door securely in proper position, then go to
net step.
Yes Troubleshooting completed.
Eplain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.
Yes Go to net step.
No Adjust or replace drive belt, then go to Step 20.
Yes Operation is normal. (Recheck malfunction symptoms.)
No Go to net step.
ACTION
A6E858001038W09
ACTION