Mazda MX-6 1998, Workshop Manual

Page: 904 / 1282

TROUBLESHOOTING
STEP INSPECTION ACTION
9* Check If there Is continuity between the
following terminals.
• Terminal 2B (10-pin, heater control
unit)-term inal C (air mix actuator)
Is there continuity?
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 *
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 7
Yes Go to step 14.
No Repair wiring harness between heater control unit and air
mix actuator, then go to step 19.
10* Turn ignition switch to LOCK.
Disconnect heater control unit 10-pin
connector and air mix actuator connector.
Check if there is continuity between the
following terminals.
• Terminal 2A (10-pin, heater control
unit)-term inal G (air mix actuator)
Is there continuity?
Yes
Go to next step.
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.
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 8
Check if there is no continuity between the
above terminals and +B circuit.
Is there no continuity?
11
*
Check if there Is continuity between the
following terminals.
• Terminal 2D (10-pin, heater control
unit)-term inal F (air mix actuator)
Is there continuity?
Yes Go to next step.
2 K 21 > < ro O 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 9
12
*
Check if there is no continuity between the
following terminals and +B circuit.
• Terminal 2B (10-pin, heater control
unlt)-term inal C (air mix actuator)
Is there no continuity?
Yes Go to next step.
2 K 21
> r <
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 A
13
Check if there is continuity between the
following terminals.
• Terminal 2C (10-pln, heater control
unit)-term inal H (air mix actuator)
• Terminal 2F (10-pin, heater control
unit)-term inal D (air mix actuator)
Are there 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
AIR MIX ACTUATOR
CONNECTOR
W 6 U 7 0 1 W A B
Check if there is no continuity between the
above terminals and ground.
Are there no continuity?___________________
0 7 -0 1 -5