Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION		ACTION
1	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR CONNECTOR Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Disconnect the passenger compartment temperature sensor connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
1		No	Repair/replace the connector or terminal. After repair procedure, go to the next step.
2	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR Inspect the passenger compartment temperature sensor. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is it normal?	Yes	Go to the next step.
2		No	Replace the passenger compartment temperature sensor. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
3	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT Disconnect the climate control unit connector and the passenger compartment temperature sensor connector. Inspect for continuity between the following terminals (wiring harness-side): Climate control unit terminal 1J-passenger compartment temperature sensor terminal A Climate control unit terminal 1W-passenger compartment temperature sensor terminal B Is there continuity?	Yes	Go to the next step.
3		No	Repair the wiring harness. Go to the next step.
4	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminal (wiring harness-side) and body ground: Climate control unit terminal 1J Is there continuity?	Yes	Repair the wiring harness. Go to the next step.
4		No	Connect the climate control unit connector, then go to the next step.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
5		No	Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal. After repair procedure, go to the next step.
6	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR CIRCUIT Connect the climate control unit connector. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Switch the ignition ON (engine off or on). Inspect the voltage at the following climate control unit terminal (wiring harness-side). Terminal 1J (passenger compartment temperature sensor input signal) Is the voltage normal? (Approx. 5 V)	Yes	The system is normal at present. Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN Switch the ignition off. Disconnect the negative battery cable. Reconnect the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Clear the past malfunction from memory. Verify DTCs. Is DTC B1A61:11 or B1A61:13 output?	Yes	Repeat the inspection from Step 1. If the malfunction does not recur, go to the next step. If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
7		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCs ARE PRESENT Verify other DTCs displayed. Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
8		No	DTC troubleshooting completed.