|
|
If the blower motor does not operate, the blower motor circuit system may be defective.
|
|
|
- Malfunction of the blower relay
- Malfunction of the blower motor
- Damaged the wiring harness or connectors
|
|
|
(1)Turn the ignition switch to the "ON" position.
|
|
|
(2)Turn the blower speed selection dial to the "MAX " position.
|
|
|
Q.
Does the blower motor operate when the blower speed selection dial is moved to the
"MAX " position?
|
|
|
 Refer to Inspection procedure 3 "The blower air volume cannot be changed  ."
|
|
|
|
|
Q.
Is the check result normal?
Go to Step 3.
 Repair the connector.
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.
|
|
(3)Measure the voltage between terminal 1 and body earth.
OK: System voltage
Q.
Is the check result normal?
Go to Step 13.
Go to Step 4.
|
|
Q.
Is the check result normal?
Go to Step 5.
Repair the connector.
|
|
|
Q.
Is the blower relay continuity in good condition?
|
|
|
Replace the blower relay.
|
|
|
|
|
(1)Remove the relay, and measure at the junction block side.
(2)Turn the ignition switch to the "ON" position.
|
|
(3)Measure the voltage between terminal 1 and earth.
OK: System voltage
Q.
Is the check result normal?
Go to Step 8.
Go to Step 7.
|
|
| note |
Prior to the wiring harness inspection, check junction block connector C-207, and repair
if necessary.
|
- Check the blower relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
|
|
(1)Remove the relay, and measure at the junction block side.
|
|
(2)Measure the voltage between terminal 4 and body earth.
OK: System voltage
Q.
Is the check result normal?
Go to Step 10.
Go to Step 9.
|
|
| note |
Prior to the wiring harness inspection, check junction block connector C-213, and repair
if necessary.
|
- Check the blower relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
|
|
(2)Measure the resistance between terminal 2 and body earth.
OK: Continuity (Less than 2Ω)
Q.
Is the check result normal?
Go to Step 12.
Go to Step 11.
|
|
| note |
Prior to the wiring harness inspection, check junction block connector C-208, and repair
if necessary.
|
- Check the blower relay earth line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
|
|
| note |
Prior to the wiring harness inspection, check junction block connector C-207, and repair
if necessary.
|
- Check the blower relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
|
|
Q.
Is the check result normal?
Go to Step 14.
Repair the connector.
|
|
- Check the blower relay earth wires for open circuit.
Q.
Is the check result normal?
Go to Step 15.
Repair the wiring harness.
|
|
Q.
Is the check result normal?
Go to Step 16.
Repair the connector.
|
|
- Check the A/C-ECU input line for open circuit.
Q.
Is the check result normal?
Go to Step 17.
Repair the wiring harness.
|
|
(1)Disconnect the connector, and measure at the wiring harness side.
|
|
(2)Measure the resistance between terminal 2 and body earth.
OK: Continuity (Less than 2Ω)
Q.
Is the check result normal?
Go to Step 19.
Go to Step 18.
|
|
- Check the power transistor earth line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring harness.
|
|
|
Check that the blower motor works normally.
|
|
|
Q.
Is the check result normal?
|
|
|
This diagnosis is complete.
|
|
|
|
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)