ON-BOARD DIAGNOSTIC FUNCTION

id0702a2100300

Present Failure Indication Mode

• In present failure indication mode, present failures in the control system circuits (open, short circuits) are detected, and the flashing of the rear defroster indicator light on the climate control unit indicates the DTCs shown in the table below.

Past Failure Indication Mode

• In past failure indication mode, past failures (intermittent problems) in the input sensor circuits (open, short circuits) are stored, and the flashing of the rear defroster indicator light on the climate control unit indicates the DTCs shown in the table below. Erase DTCs from the memory after failures have been corrected so they are not maintained as past failures.

Diagnostic trouble codes

DTC No.

Indicator pattern

Diagnosed circuit

Detected condition

Memo rized

02

Solar radiation sensor (present)
Open circuit in solar radiation sensor circuit
Short circuit in solar radiation sensor circuit (terminal B side only)
No
06

Cabin temperature sensor (present)
Open/short circuit is in cabin temperature sensor circuit
No
07

Cabin temperature sensor (past)
Cabin temperature sensor circuit is entered fail-safe mode at least once
Yes
10

Evaporator temperature sensor (present)
Open/short circuit is in evaporator temperature sensor circuit
No
11

Evaporator temperature sensor (past)
Evaporator temperature sensor circuit is entered fail-safe mode at least once
Yes
12

Ambient temperature sensor (present)
Open/short circuit is in Ambient temperature sensor circuit
No
13

Ambient temperature sensor (past)
Ambient temperature sensor circuit is entered fail-safe mode at least once
Yes
14

Water temperature sensor (present)
Open/short circuit is in Water temperature sensor circuit
No
15

Water temperature sensor (past)
Water temperature sensor circuit is entered fail-safe mode at least once
Yes
18

Air mix actuator (potentiometer) (present)
Open/short circuit is in air mix actuator (potentiometer) circuit
No
19

Air mix actuator (potentiometer) (past)
Air mix actuator (potentiometer) circuit is entered fail-safe mode at least once
Yes
21

Airflow mode actuator (potentiometer) (present)
Open/short circuit is in airflow mode actuator (potentiometer) circuit
No
22

Airflow mode actuator (potentiometer) (past)
Airflow mode actuator (potentiometer) circuit is entered fail-safe mode at least once
Yes
58

Air mix actuator (motor lock) (past)
Air mix actuator circuit is entered fail-safe mode at least once
Yes
59

Airflow mode actuator (motor lock) (past)
Airflow mode actuator circuit is entered fail-safe mode at least once
Yes

Output Device Operation Check Mode

• In the output device operation check mode, the climate control unit forces all the output system actuation devices to operate regardless of the input system. The displays change and the switch indicator lights illuminate automatically according to the actuator operated.
• Inspect visually, listen for operation sound, and place hands over air discharge outlets to check for correct operating conditions and to locate the malfunctioning system.

Output device operation check table

Step

Operating device

Operating conditions

Moni tor*

Other device conditions

1
Blower motor speed

1
• Air mix actuator operation
- 50%
• Airflow mode actuator operation
- VENT
• Air intake actuator operation
- FRESH
• A/C compressor operation
- ON
2
Air mix actuator operation

21.0
• Blower motor speed
- 3rd
• Airflow mode actuator operation
- VENT
• Air intake actuator operation
- FRESH
• A/C compressor operation
- ON
20.5
20.0
3
Airflow mode actuator operation

3
• Blower motor speed
- 3rd
• Air mix actuator operation
- 50%
• Air intake actuator operation
- FRESH
• A/C compressor operation
- ON
4
Air intake actuator operation

4
• Blower motor speed
- 3rd
• Air mix actuator operation
- 0%
• Airflow mode actuator operation
- VENT
A/C compressor operation

* :
Shown on the information display according to step.