Without 7 Inch Display

BLOWER MOTOR


Description











- The blower motor utilizes a brush-less motor with a rotating magnet.
- Quietness is improved over previous motors where the brush was the point of contact and the coil rotated.




BLOWER MOTOR


Diagnosis Procedure

1.SELF-DIAGNOSIS RESULT CHECK
With CONSULT-III
1. Perform the "SELF-DIAGNOSIS".
2. Check if any DTC is detected in the self-diagnostic results.

NOTE:
If DTC is displayed along with DTC "U1000" or "U1010", first diagnose the DTC "U1000" or "U1010". Refer to Without 7 Inch Display or Without 7 Inch Display.
Is any DTC displayed?
YES - Perform the diagnosis that is applicable to the sensor and actuator. Refer to Without 7 Inch Display or Testing and Inspection.
NO - GO TO 2.
2.PERFORM ACTIVE TEST
With CONSULT-III
1. Perform the "HVAC TEST" of HVAC active test item.
2. Check that the blower motor control signal changes according to each indicator number.





Does it operate normally?
YES - INSPECTION END
NO - GO TO 3.
3.CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the blower motor connector.
3. Turn the ignition switch ON.
4. Check voltage between blower motor harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 7.
4.CHECK BLOWER MOTOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check for continuity between blower motor harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1. Disconnect the A/C auto amp. connector.
2. Check for continuity between the blower motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair the harnesses or connectors.
6.CHECK A/C AUTO AMP. OUTPUT SIGNAL
1. Reconnect blower motor connector and A/C auto amp. connector.
2. Turn the ignition switch ON.
3. Set the mode control dial to VENT position.
4. Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector and ground by using an oscilloscope.

NOTE:
Calculate the drive signal duty ratio as shown in the figure.





T2 = Approx. 1.6 ms





Is the inspection result normal?
YES - Replace blower motor after confirming the fan air flow does not change.
NO - Replace the A/C auto amp.
7.CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1. Turn the ignition switch OFF.
2. Disconnect the blower motor connector and fuse block (J/B) connector.
3. Check the continuity between the blower motor harness connector and fuse block (J/B) harness connector.





4. Check for continuity between blower motor harness connector and ground.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair the harnesses or connectors.
8.CHECK FUSE
Check 15A fuses [Nos. 21 and 22, located in the fuse block (J/B)].

NOTE:
Refer to Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES - Inspection the power supply circuit. Refer to Wiring Diagram - Ignition Power Supply.
NO - Replace the fuse after repairing the applicable circuit.