Mazda RX-8 Manual page 1713

NO.7 NO COOL AIR
7
DESCRIPTION
POSSIBLE CAUSE
When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors
•
while performing 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 harnesses are
connected correctly and undamaged.
Diagnostic procedure
STEP INSPECTION
INSPECT AIR BLOW OUT
1
Does air blow out?
•
INSPECT A/C COMPRESSOR OPERATION
Start engine.
•
2
Turn A/C switch and fan switch on.
•
Does A/C compressor operate?
•
INSPECT FOR DTC IN PCM
Inspect for DTCs related to the PCM on-board
•
3
diagnostic system.
Are any DTCs displayed?
•
No cool air
Magnetic clutch does not operate.
•
Malfunction in PCM A/C cut control system (Step 3)
•
Malfunction in A/C amplifier (Step 4)
•
Malfunction in refrigerant pressure switch (Steps 5, 79)
•
Malfunction in PCM (A/C signal) (Step 6)
•
Malfunction in PCM (IG1 signal) (Steps 10, 11)
•
Malfunction in A/C compressor (Step 12)
•
Malfunction in A/C relay (Steps 1315)
•
Malfunction in evaporator temperature sensor (Step 16)
•
ACTION
Yes Go to next step.
Go to Step 1 of troubleshooting indexes
No
No.1 and 2.
Go to Step 1 of troubleshooting index
Yes
No.6.
No Go to next step.
Yes Go to appropriate inspection procedure.
No Go to next step.
(w) RX-8 - HVAC
Page 84