DTC 11

id070200802600

DTC 11

Evaporator temperature sensor system inspection

POSSIBLE CAUSE

•  Evaporator temperature sensor malfunction

•  Open circuit in wiring harness between A/C amplifier connector terminal 2F and evaporator temperature sensor connector terminal B

•  Open circuit in wiring harness between A/C amplifier connector terminal 2N and evaporator temperature sensor connector terminal A

•  Short to ground in wiring harness between A/C amplifier connector terminal 2F and evaporator temperature sensor connector terminal B

•  Connector or terminal malfunction

DTC 11	Evaporator temperature sensor system inspection
POSSIBLE CAUSE	• Evaporator temperature sensor malfunction • Open circuit in wiring harness between A/C amplifier connector terminal 2F and evaporator temperature sensor connector terminal B • Open circuit in wiring harness between A/C amplifier connector terminal 2N and evaporator temperature sensor connector terminal A • Short to ground in wiring harness between A/C amplifier connector terminal 2F and evaporator temperature sensor connector terminal B • Connector or terminal malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT EVAPORATOR TEMPERATURE SENSOR • Inspect the evaporator temperature sensor. (See EVAPORATOR INSPECTION.) • Is it normal?	Yes	Go to the next step.
1		No	Replace the evaporator temperature sensor. (See A/C UNIT DISASSEMBLY/ASSEMBLY.)
2	INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT • Disconnect the A/C amplifier connector (16-pin) and the evaporator temperature sensor connector. • Is there an open circuit in the wiring harness between the following terminals of the A/C amplifier connector (16-pin) and the evaporator temperature sensor connector? ― 2F—B ― 2N—A	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2F and evaporator temperature sensor connector terminal B?	Yes	Repair the wiring harness.
3		No	Connect the A/C amplifier connector (16-pin), then go to the next step.
4	INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT • Turn the ignition switch to the ON position. • Inspect the voltage at the following A/C amplifier terminal (wiring harness side). ― Terminal 2F (16-pin, evaporator temperature sensor input signal) • Is the voltage normal? (Approx. 5 V)	Yes	The system is normal at present. (Clear the past malfunction from memory.)
4		No	Inspect the connection at the A/C amplifier connector (16-pin).