DIAGNOSIS Mitsubishi Lancer Evolution IX

DIAGNOSIS

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

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1. STEP 1. Check the circuit at fan control module connector A-17 (terminal 3). Disconnect fan control module connector A-17, and measure at the harness side connector. Measure the voltage between terminal number 3 and ground. When the ignition switch is turned to the "ON" position, voltage should measure battery positive voltage. Q: Is there voltage battery positive voltage when the ignition switch is turned to the "ON" position? YES : Go to Step 8 . NO : Go to Step 2.
2. STEP 2. Check the fan control relay. Refer to «FAN CONTROL RELAY CONTINUITY CHECK»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/cooling-system-mechanical/#cooling-lancer__fan-control-relay-continuity-check) . Q: Is the fan control relay in good condition? YES : Go to Step 3. NO : Replace it, then go to Step 1.
3. STEP 3. Check the MFI relay. Refer to «MULTIPORT FUEL INJECTION (MFI) RELAY CONTINUITY CHECK»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/removal-installation/#multiport-fuel-injection-mfi-lancer-20l) . Q: Is the MFI relay in good condition? YES : Go to Step 4. NO : Replace it, then go to Step 1 .
4. STEP 4. Check for harness damage between fusible link number 2 and fan control relay connector A-09X (terminal 4). Q: Are the harness wires between fusible link number 2 and fan control relay connector A-09X damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 5.
5. STEP 5. Check for harness damage between fan control relay connector A-09X (terminal 2) and fan control module connector A-17 (terminal 3). Q: Are the harness wires between fan control relay connector A-09X (terminal 2) and fan control module connector A-17 (terminal 3) damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 6.
6. STEP 6. Check for harness damage between MFI relay connector B-16X and fan control relay connector A-09X. NOTE: After inspecting intermediate connector A-13 terminal 8 and joint connector C-105 terminal 28, 33 inspect the wires. If intermediate connector A-13 and joint connector C-105 are damaged, repair or replace them. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer) . Q: Are the harness wires between MFI relay connector B-16X (terminal 4) and fan control relay connector A-09X (terminal 1) damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 7.
7. STEP 7. Check for harness damage between fan control relay connector A-09X (terminal 3) and ground. Q: Are the harness wires between fan control relay connector A-09X (terminal 3) and ground damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 8.
8. STEP 8. Check the circuit at fan control module connector A-17 (terminal 1). Disconnect fan control module connector A-17, and measure at the harness side connector. Measure the resistance between terminal number 1 and ground. Q: Is the resistance less than 2 ohms? YES : Go to Step 10 . NO : Go to Step 9.
9. STEP 9. Check the harness wire between fan control module connector A-17 and ground. Q: Are the harness wires between fan control module connector A-17 and ground damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 10.
10. STEP 10. Measure the output circuit voltage at ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17) < 2.4L-A/T > by backprobing. Do not disconnect ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17)< 2.4L-A/T >. Start the engine and allow it to idle. Measure the voltage between terminal number 18 < 2.0L > or 17 < 2.4L > and ground by backprobing. Q: Is the voltage 0.7 volt or more when the radiator fan is operating? YES : Go to Step 12 . NO : Go to Step 11.
11. STEP 11. Check the harness wire between ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17) < 2.4L-A/T > and fan control module connector A-17. NOTE: If intermediate connector A-13 terminal 1 is damaged, repair or replace it. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer) . Q: Are the harness wires between ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17) < 2.4L-A/T > and fan control module connector A-17 (terminal 2) damaged? YES : Repair or replace them, then go to Step 13 . NO : Go to Step 12.
12. STEP 12. Check the fan control module at ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17) < 2.4L-A/T >. Disconnect ECM connector C-119 (terminal 18) < 2.0L-M/T >, C-133 (terminal 17) < 2.4L-M/T > or PCM connector C-120 (terminal 18) < 2.0L-A/T >, C-134 (terminal 17) < 2.4L-A/T >. Turn the ignition switch to the "ON" position. Q: Do the radiator fan motor and condenser fan motor operate? YES : Replace the ECM < M/T > or PCM < A/T >. Then go to Step 13. NO : Replace the fan control module. Then go to Step 13.
13. STEP 13. Check the symptoms. Q: Do the radiator fan and condenser fan operate correctly? YES : The procedure is complete. NO : Return to Step 1 .