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Home >> Mitsubishi >> 2011 >> Eclipse Spyder L4-2.4L (4G69) >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Manual Air Conditioning >> Inspection Procedure 4

Inspection Procedure 4




INSPECTION PROCEDURE 4: Blower Fan and Motor do not Turn.


















FUNCTION

The air from the blower fan is cooled or warmed to control the temperature.

PROBABLE CAUSES

- Malfunction of the blower relay
- Malfunction of the blower motor
- Malfunction of the blower switch
- Malfunction of the harness.
- Malfunction of connector.

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check blower motor connector C-116 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is blower motor connector C-116 in good condition?

YES Go to Step 2.

NO Repair or replace the connector. Harness Connector Inspection.

STEP 2. Measure the voltage at blower motor connector C-116.





(1)Disconnect blower motor connector C-116, and measure the voltage at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.
(3)Turn the blower speed selection dial to the "4 (HI)" position.





(4)Measure the voltage between terminal 1 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 15.

NO Go to Step 3.

STEP 3. Check blower relay connector C-206 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is blower relay connector C-206 in good condition?

YES Go to Step 4.

NO Repair or replace the connector. Harness Connector Inspection.

STEP 4. Check the blower relay continuity.





Follow the table below to check the blower relay for continuity.





Q. Is the blower relay continuity in good condition?

YES Go to Step 5.

NO Replace the blower relay.

STEP 5. Measure the voltage at blower relay connector C-206.





(1)Disconnect blower relay connector C-206, and measure the voltage at the junction block side.
(2)Turn the ignition switch to the "ON" position.





(3)Measure the voltage between terminal 1 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 7.

NO Go to Step 6.

STEP 6. Check the wiring harness between blower relay connector C-206 (terminal 1) and the ignition switch (IG2).





NOTE:
Also check junction block connector C-202 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-202 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between blower relay connector C-206 (terminal 1) and the ignition switch (IG2) in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 7. Measure the voltage at blower relay connector C-206.





(1)Disconnect blower relay connector C-206, and measure the voltage at the junction block side.





(2)Measure the voltage between terminal 5 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 9.

NO Go to Step 8.

STEP 8. Check the wiring harness between blower relay connector C-206 (terminal 5) and fusible link (1).









NOTE:
Also check intermediate connector C-24 and junction block connector C-204 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24, junction block connector C-204 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between blower relay connector C-206 (terminal 5) and fusible link (1) in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 9. Measure the resistance at blower relay connector C-206.





(1)Disconnect blower relay connector C-206, and measure the resistance at the wiring harness side.





(2)Measure the resistance value between terminal 3 and ground.

- The measured value should be 2 ohms or less.

Q. Does the measured resistance value correspond with this range?

YES Go to Step 11.

NO Go to Step 10.

STEP 10. Check the wiring harness between blower relay connector C-206 (terminal 3) and ground.









NOTE:
Also check junction block connector C-215 and joint connector C-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-215 and joint connector C-01 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between blower relay connector C-206 (terminal 3) and ground in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 11. Check blower switch connector C-12 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is blower switch connector C-12 in good condition?

YES Go to Step 12.

NO Repair or replace the connector. Harness Connector Inspection.

STEP 12. Check the blower switch continuity.





Follow the table below to check the blower switch for continuity.





Q. Is the blower switch continuity in good condition?

YES Go to Step 13.

NO Replace the heater control.

STEP 13. Check the wiring harness between blower motor connector C-116 (terminal 1) and blower switch connector C-12 (terminal 5).









Q. Is the wiring harness between blower motor connector C-116 (terminal 1) and blower relay connector C-12 (terminal 5) in good condition?

YES Go to Step 14.

NO Repair the wiring harness.

STEP 14. Check the wiring harness between blower switch connector C-12 (terminal 4) and blower relay connector C-206 (terminal 4).









NOTE:
Also check junction block connector C-202 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-202 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between blower switch connector C-12 (terminal 4) and blower relay connector C-206 (terminal 4) in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 15. Measure the resistance at blower motor connector C-116 in order to the ground circuit to the blower motor.





(1)Disconnect blower motor connector C-116, and measure the resistance at the wiring harness side.





(2)Measure the resistance value between terminal 2 and ground.
OK: Less than 2 ohms
Q. Does the measured resistance value correspond with this range?

YES Go to Step 17.

NO Go to Step 16.

STEP 16. Check the wiring harness between blower motor connector C-116 (terminal 2) and ground.





Q. Is the wiring harness between blower motor connector C-116 (terminal 2) and ground in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 17. Check the blower fan and motor operation.





When battery voltage is applied between the terminals, check that the motor operates. Also, check that there is no abnormal noise.

Q. Is there any abnormal noise?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Replace the blower motor.

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