Mazda MX-6 1998, Workshop Manual

Page: 903 / 1282

TROUBLESHOOTING
STEP INSPECTION ACTION
Disconnect air mix actuator connector.
Measure voltage at terminal G (+5 V signal) of
air mix actuator connector of wiring harness.
Is voltage a p p ro x im a te ly 5 V?
A I R M I X A C T U A T O R
f
G
X
C *
H F D *
W 6 U 7 0 1 W A 3
Yes Inspect air mix actuator, then go to step 19.
No Go to next step.
6
*
Turn ignition switch to LOCK.
Disconnect heater control unit 10-pin
connector.
Check if there is no continuity between the
following terminals and ground.
• Terminal 2A (10-pin, heater control
unit)-term inal G (air mix actuator)
Is there no continuity?
Yes Replace heater control unit, then go to step 19.
2 K 21
x
2 C
2 A
2 L 2 J 2 H | 2 F 2 D 2 B
G
X
C *
H F D *
No Repair wiring harness between heater control unit and air
mix actuator, then go to step 19.
HEATER CONTROL UNIT
10-PIN CONNECTOR AIR MIX ACTUATOR
CONNECTOR
W 6 U 7 0 1 W A 4
7* Disconnect heater control unit 10-pin
connector and air mix actuator connector.
Check if there is no continuity between the
following terminals and ground.
• Terminal 2D (10-pin, heater control
unit)-term inal F (air mix actuator)
Is there no continuity?
Yes Go to step 14.
2 K
21
> 7 <
2 C
2 A
2 L 2 J 2 H | 2 F 2 D 2 B
G
X
C *
H F D
*
No Repair wiring harness between heater control unit and air
mix actuator, then go to step 19.
H E A T E R C O N T R O L U N I T
1 0 - P I N C O N N E C T O R
A I R M I X A C T U A T O R
C O N N E C T O R
W 6 U 7 0 1 W A 5
8
*
Turn ignition switch to LOCK.
Disconnect heater control unit 10-pin
connector and air mix actuator connector.
Check if there is no continuity between the
following terminals and +B circuit.
• Terminal 2D (10-pin, heater control
unit)-term inal F (air mix actuator)
Is there no continuity?
Yes Go to next step.
2 K 21
> <
2 C
2 A
2 L 2 J 2 H | 2 F 2 D 2 B
G
X
C
*
H F D *
No Repair wiring harness between heater control unit and air
mix actuator, then go to step 19.
H E A T E R C O N T R O L U N I T
1 0 - P I N C O N N E C T O R
A I R M I X A C T U A T O R
C O N N E C T O R
W 6 U 7 0 1 W A 6
0 7 -0 1 -4