HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Diagnostics for A/C System Malfunction > BLOWER FAN DOES NOT ROTATE

HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Diagnostics for A/C System Malfunction

BLOWER FAN DOES NOT ROTATE

TROUBLE SYMPTOM:

• Blower motor does not rotate.

• Blower motor does not change speeds.

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK FUSE. 1) Remove fuse No. 1, 2 and 17 from fuse & relay box. 2) Check the condition of fuse.	Is any fuse blown out?	Replace the fuse.
2.CHECK POWER SUPPLY FOR BLOWER MOTOR. 1) Turn the ignition switch to ON. 2) Turn the fan speed control dial to the right. 3) Measure the voltage between blower motor and chassis ground. Connector & terminal (B87) No. 1 (+) — Chassis ground (−):	Is the voltage 8 V or more (at normal temperature)?		Repair the open circuit of blower motor power supply line harness.
3.CHECK BLOWER MOTOR RELAY. 1) Turn the ignition switch to OFF. 2) Remove the blower motor relay. 3) Connect the battery positive (+) terminal to terminal No. 1 of blower motor relay, and negative (−) terminal to terminal No. 2. 4) Measure the resistance between terminals No. 3 and No. 4. Terminals No. 3 — No. 4:	Is the resistance less than 1 Ω?		Replace the blower motor relay.
4.CHECK BLOWER MOTOR. 1) Disconnect the connector from the blower motor. 2) Connect the battery positive (+) terminal to terminal No. 1 of the blower motor connector, and negative (−) terminal to terminals No. 2 and 5. 3) Make sure the blower motor runs.	Does the blower motor run?		Replace the blower motor.
5.CHECK POOR CONTACT. Check poor contact of auto A/C control module connector.	Is there poor contact in the connector?	Repair the connector.	Replace the auto A/C control module.