HVAC DTC Troubleshooting: 13 - Honda Accord CR/CT 2012-2017

1.

Problem verification:

Problem verification

?1.	Turn the ignition switch to LOCK (0) and then back to ON (II).

?2.	Do the Self-Diagnostic Function with the HVAC control unit.

?3.	Check for DTCs.

Is DTC 13 indicated?

Go to step 2.

Intermittent failure. Check for loose wires or poor connections on the evaporator temperature sensor circuit.?

2.

Shorted wire check (TEVA line):

Shorted wire check (TEVA line)

?1.	Turn the ignition switch to LOCK (0).

?2.

Disconnect the following connectors.

?3.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0)
	HVAC control unit 32P connector: disconnected
	Evaporator temperature sensor 2P connector: disconnected
Test circuit	TEVA
Test point 1	HVAC control unit 32P connector No. 32 (RED)
Test point 2	Body ground

Is there continuity?

Repair a short to body ground in the wire between the HVAC control unit and the evaporator temperature sensor.?

The TEVA wire is not shorted. Go to step 3.

3.

Shorted wire check (TEVA line to SENSOR COM/SENS-COM line):

Shorted wire check (TEVA line to SENSOR COM/SENS-COM line)

?1.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0)
	HVAC control unit 32P connector: disconnected
	Evaporator temperature sensor 2P connector: disconnected
Test circuit	TEVA, SENSOR COM
Test point 1	HVAC control unit 32P connector No. 20 (BLU)
Test point 2	HVAC control unit 32P connector No. 32 (RED)

Is there continuity?

Repair a short in the wires between the HVAC control unit and the evaporator temperature sensor.?

The TEVA wire and SENSOR COM/SENS-COM wire are OK. Go to step 4.

4.

Evaporator temperature sensor check:

Evaporator temperature sensor check

?1.	Test the evaporator temperature sensor.

Is the evaporator temperature sensor OK?