Mazda 6 2002 Workshop Manual page 1160

NO.5 NO TEMPERATURE CONTROL WITH CLIMATE CONTROL UNIT
5 No temperature control with climate control unit.
DESCRIPTION • Malfunction in A/C unit and/or climate control unit air mi system.
• A/C unit air mi link, air mi crank, air mi rod, air mi wire, wire clamp malfunction (Steps 2, 3)
POSSIBLE • Climate control unit rack-and-pinion, air mi wire malfunction (Step 4)
CAUSE • A/C unit air mi door malfunction (Steps 5, 6)
• Heater piping malfunction (Step 7)
Diagnostic procedure
STEP
1 INSPECT COOLANT TEMPERATURE
• Is coolant sufficiently warmed up?
2 INSPECT A/C UNIT AIR MIX SYSTEM
• Inspect A/C unit air mi links, air mi cranks,
air mi rods, air mi actuator or wire clamp.
— Is there grease on links and cranks?
— Are links, cranks, and rods securely
installed in their proper positions?
— Is wire clamp free of deformation?
• Are above items okay?
3 VERIFY THAT AIR MIX WIRE FROM A/C UNIT
IS POSITIONED SECURELY AND
CORRECTLY (IF AVAILABLE)
• Is air mi wire securely installed in the
correct position in relation to A/C unit air mi
links?
4 INSPECT CLIMATE CONTROL UNIT
• Inspect climate control unit. (See
CLIMATE CONTROL UNIT
• Is climate control unit okay?
5 INSPECT A/C UNIT
• Is there any foreign material or obstruction in
A/C unit air mi doors?
6 INSPECT A/C UNIT AIR MIX DOORS
• Is A/C unit air mi door securely and properly
installed?
7 INSPECT HEATER LINES
• Inspect heater lines.
— Is heater piping free of damage and
cracks?
— Are heater piping connections free of
engine coolant leakage?
— Are heater piping connections securely
tightened?
— Are heater piping installation points on A/
C unit free of engine coolant leakage?
• Are above items okay?
8 VERIFY THAT MALFUNCTION SYMPTOM
OCCURS AFTER REPAIR
• Does unit operate in every temperature
setting?
End Of Sie
NO.6 WINDSHIELD FOGGED
• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If
there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and
undamaged.
6 Windshield fogged.
• A/C compressor does not operate while airflow mode is in DEFROSTER or HEAT/DEF modes.
DESCRIPTION • Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or HEAT/DEF
modes.
U–70
TROUBLESHOOTING
INSPECTION
U–47
INSPECTION)
Yes Go to net step.
No Warm engine up, then go to Step 8.
Yes Go to net step.
No Apply grease or install links, cranks, and rods securely in
their proper positions, repair or replace air mi actuator or
wire clamp, then go to Step 8.
Yes Go to net step.
No Adjust air mi wire or install securely in correct position, then
go to Step 8.
Yes Go to net step.
No Repair or replace climate control unit, then go to Step 8.
Yes Remove obstruction, then go to Step 8.
No Go to net step.
Yes Inspect air mi door for cracks or damage, then go to net
step.
No Install air mi door securely in proper position, then go to
net step.
Yes Operation is okay. Recheck malfunction symptoms.
No If heater piping connections is loosed, tighten connections
with specified torque.
Repair or replace heater piping, then go to net step.
Yes Troubleshooting completed.
Eplain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.
A6E858001038W07
ACTION
A6E858001038W08