DTC 19
id070200803200
DTC 19
Air mix actuator (potentiometer) system inspection
POSSIBLE CAUSE
• Air mix actuator malfunction
• Climate control unit malfunction
• Open circuit between air mix actuator and climate control unit
• Short circuit between air mix actuator (terminal C) and climate control unit (terminal 1U: 24-pin)
Diagnostic Procedure
STEP
INSPECTION
ACTION
1
• Inspect air mix actuator.
• Is it okay?
Yes
Go to next step.
No
Replace air mix actuator.
2
• Disconnect climate control unit connector (24-pin) and air mix actuator connector.
• Is there open circuit between following terminals of climate control unit connector (24-pin) and air mix actuator connector?
- 1B-B
- 1U-C
- 1I-A
Yes
Repair wiring harness.
No
Go to next step.
3
• Is there short circuit to ground between terminal 1U of climate control unit connector (24-pin) and terminal C of air mix actuator connector?
Yes
Repair wiring harness.
No
This system is normal at present. (Erase the past failure from memory.)