Mazda MX-6 1998, Workshop Manual

Page: 907 / 1282

TROUBLESHOOTING
STEP INSPECTION ACTION
8’ Disconnect refrigerant pressure switch (LO)
connector.
Start engine.
Turn both A/C switch and fan switch on.
Measure voltage at terminal A (A/C signal) of
refrigerant pressure switch (LO) connector of
wiring harness.
Is voltage a p p ro x im a te ly 12 V?
W 6 U 7 0 1 W A E
Yes Go to next step.
No Go to step 11.
9* Check if there is continuity between the
following terminals.
• Terminal B (refrigerant pressure switch
(LO ))-term inal 1F (14-pin, heater control
unit)
Is there continuity?
Yes Go to next step.
1 0 1M 1K
X
1E 1C 1A
* 1N
1L 1J 11H
1F 1D 1B
No
B
Repair wiring harness between refrigerant pressure switch
(LO) and heater control unit, then go to step 25.
H E A T E R C O N T R O L U N I T
1 4 - P I N C O N N E C T O R
R E F R I G E R A N T
P R E S S U R E S W I T C H
( L O ) C O N N E C T O R
W 6 U 7 0 1 W A F
10 Connect heater control unit 14-pin connector.
When terminals A and B of refrigerant
pressure switch (LO) connector at wiring
harness are shorted, is cool air discharged?
Yes
Replace refrigerant pressure switch (LO), then go to step
25.
No Reconfirm malfunction symptoms.
0 7 -0 1 -8