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Cooling Fans - Except Evolution: Diagnosis Mitsubishi Lancer IX

Cooling Fan 6 illustrations ~1123 words

TROUBLE SHOOTING

Note. To trouble shoot mechanical cooling system components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

SYMPTOM TESTS

SymptomTest
Radiator Fan & Condenser Fan Do Not OperateA
Radiator Fan & Condenser Fan Do Not Change Speed Or StopB
Radiator Fan Does Not OperateC
Condenser Fan Does Not OperateD

RADIATOR FAN & CONDENSER FAN SYMPTOMS

Troubleshooting Hints

  1. Malfunction of fusible link.
  2. Malfunction of fan control relay.
  3. Malfunction of MFI relay.
  4. Malfunction of radiator fan motor.
  5. Malfunction of condenser fan motor.
  6. Malfunction of fan controller.
  7. Malfunction of ECM (manual transmission) or PCM (automatic transmission).
  8. Damaged wiring harness or connector.

Diagnosis

  1. Disconnect fan controller connector A-17. (Scheme 12) Measure for voltage between terminal No. 3 and ground when ignition switch is turned to the ON position. If battery voltage is not achieved, go to next step. If battery voltage is achieved, go to step 8.
  2. Check fan control relay. See «FAN CONTROL RELAY»(ref-167653-S16108733782004101900000) under COMPONENTS TESTS. If fan control relay is okay, go to next step. If fan control relay is not okay, replace it and retest.
  3. Check the MFI relay. See «MULTI-PORT FUEL INJECTION (MFI) RELAY»(ref-167653-S27144733912004101900000) under COMPONENT TESTS. If MFI relay is okay, go to next step. If MFI relay is not okay, replace it and retest.
  4. Check for harness damage in Black/White wire between fusible link No. 2 and terminal No. 4 of fan control relay connector A-09X. (Scheme 13) If wire is okay, go to next step. If wire is damaged, repair or replace as necessary and retest.
  5. Check for harness damage in Blue wire between terminal No. 2 of fan control relay connector A-09X and terminal No. 3 of fan controller connector A-17. (Scheme 12)and (Scheme 13). If wire is okay, go to next step. If wire is damaged, repair or replace as necessary and retest.
  6. Check for harness in damage in Red/Yellow wire between terminal No. 4 of MFI relay connector B-12X and terminal No. 1 of fan control relay connector A-09X. (Scheme 13)and (Scheme 16). If wire is okay go to next step. Of wire is damaged, repair or replace as necessary and retest.
  7. Check for harness damage between terminal No. 3 of fan control relay connector A-09X and ground. (Scheme 13) If wire is okay, go to next step. If wire is damaged, repair it and retest.
  8. Disconnect fan controller connector A-17. (Scheme 12) Measure resistance between terminal No. 1 and ground. If the resistance is 2 ohms or more, go to next step. If resistance is less than 2 ohms, go to step 10.
  9. Check the harness wires between fan controller connector A-17 and ground. If harness wires are okay, go to next step. If harness wires are damaged, repair as necessary and retest.
  10. Start the engine and allow it to idle. Measure the output circuit voltage between identified ECM or PCM terminals and ground by backprobing. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. (Scheme 17) If the voltage when the radiator fan is operating is less than 0.7V, go to next step. If the voltage when the radiator fan is operating is 0.7V or more, go to step 12.
  11. Check the Blue wire between identified ECM or PCM terminals and terminal No. 2 of fan controller connector A-17. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. (Scheme 12)and (Scheme 17). If wiring is damaged, repair or replace as necessary and retest. If wiring is okay, go to next step.
  12. Disconnect ECM or PCM connector. Turn the ignition switch to the ON position. If the radiator fan motor and condenser fan motor operate, replace the ECM or PCM and retest. If the radiator fan motor and condenser fan motor do not operate, replace the fan controller and retest.
ApplicationTerminal No.Connector
A/T18C-120
M/T21C-121

OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

TEST B: RADIATOR FAN & CONDENSER FAN DO NOT CHANGE SPEED OR STOP

Note. If the engine coolant temperature reaches 230°F (110°C) or higher, the radiator fan control runs the radiator fan for up to 5 minutes even after the ignition switch is turned to the LOCK position. The fan stops its rotation when the engine coolant temperature decreases to 230°F (110°C) or lower.

  1. Malfunction of fan control relay.
  2. Malfunction of fan controller.
  3. Malfunction of ECM (vehicles with manual transmission) or PCM (vehicles with automatic transmission).
  1. Check the fan control relay. See «FAN CONTROL RELAY»(ref-167653-S16108733782004101900000) under COMPONENT TESTS. If fan control relay is okay, go to next step. If fan controller is damaged, repair or replace as necessary and retest.
  2. Check the harness wire between terminal No. 2 of fan control relay connector A-09X and terminal No. 3 of fan controller connector A-17. (Scheme 12)and (Scheme 13). If wiring is damaged, repair or replace as necessary and retest. If wiring is okay, go to next step.
  3. Start the engine and allow it to idle. Measure the output circuit voltage between identified ECM or PCM terminals and ground by backprobing. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. (Scheme 17) If the voltage when the radiator fan is not operating is more than 0.3V, go to next step. If the voltage when the radiator fan is not operating is 0.3V or less, retest.
  4. Check the Blue wire between identified ECM or PCM terminals and terminal No. 2 of fan controller connector A-17. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. (Scheme 12)and (Scheme 17). If wiring is damaged repair or replace as necessary and retest. If wiring is okay, go to next step.
  5. Disconnect ECM or PCM connector. Pull out identified ECM or PCM pin and connect it to a body ground. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. (Scheme 17) Reconnect ECM or PCM connector with identified pin still removed. See «OUTPUT CIRCUIT VOLTAGE TERMINAL IDENTIFICATION»(ref-167653-S16663237622004101900000) table. Turn the ignition switch to ON position. If the radiator fan motor and condenser fan motor fan motor stop operating, replace the ECM or PCM and retest. If the radiator fan motor and condenser fan motor do not stop operating, replace the fan controller and retest.
  1. Malfunction of radiator fan motor.
  2. Malfunction of fan controller.
  1. Check the radiator fan motor. See «RADIATOR FAN MOTOR»(ref-167653-S02791357392004101900000) under COMPONENT TESTS. If radiator fan motor is okay, go to next step. If radiator fan motor is not okay, replace radiator fan motor and retest.
  2. Check the fan controller. See «FAN CONTROLLER»(ref-167653-S32361916632004101900000) under COMPONENT TESTS. If fan controller is okay, retest. If fan controller is not okay, replace fan controller and retest.
  1. Malfunction of condenser fan motor.
  2. Malfunction of fan controller.
  1. Check the condenser fan motor. See «CONDENSER FAN MOTOR»(ref-167653-S24765015632004101900000) under COMPONENT TESTS. If condenser fan motor is okay, go to next step. If radiator fan motor is not okay, replace radiator fan motor and retest.
  2. Check the fan controller. See «FAN CONTROLLER»(ref-167653-S32361916632004101900000) under COMPONENT TESTS. If fan controller is okay, retest. If fan controller is not okay, replace fan controller and retest.

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