INSPECTION
PROCEDURE 2: The blower does not work
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COMMENTS ON TROUBLE SYMPTOM
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If the blower motor does not operate, the blower motor circuit system may be defective.
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- Malfunction of the blower relay
- Malfunction of the blower motor
- Malfunction of the heater resister
- Malfunction of the blower switch
- Damaged wiring harness or connector
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STEP 1. Check the blower relay.
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Refer to  .
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Q.
Is the blower relay in good condition?
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 Go to Step 2.
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 Replace the blower relay.
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STEP 2. Voltage measurement at blower relay connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 2, 4 and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 3.
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Go to Step 4.
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STEP 3. Check open circuit in blower relay line between ignition switch <Vehicles
without one touch start system> or IG2 relay <Vehicles with one touch start
system>, fusible link (6), blower relay connector and body earth.
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Before the wiring harness check, check the junction block connector.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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STEP 4. Check the blower motor.
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Refer to .
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Q.
Is the blower motor in good condition?
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Go to Step 5.
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Replace the blower motor.
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STEP 5. Voltage measurement at blower motor connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 1 and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 6.
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STEP 6. Check open circuit in blower motor line between blower relay
and blower motor connector.
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Before the wiring harness check, check the junction block connector and joint connector.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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STEP 7. Check the heater resister.
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Refer to .
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Q.
Is the heater resister in good condition?
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Go to Step 8.
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Replace the heater resistor.
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STEP 8. Check open circuit in heater resister line between blower
motor connector and heater resister connector.
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Q.
Is the check result normal?
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Go to Step 9.
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Repair the connector(s) or wiring harness.
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STEP 9. Resistance measurement at the blower switch connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Continuity between terminal 4 and body earth
OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Go to Step 10.
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STEP 10. Check the blower switch.
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Refer to .
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Q.
Is the blower switch in good condition?
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Go to Step 11.
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Replace the heater control panel.
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STEP 11. Check open circuit in blower switch line between blower motor
connector, heater resister connector blower switch connector, and body earth.
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Before the wiring harness check, check the junction block connector and joint connector.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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