DIAGNOSIS

Required Special Tools

MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991911: MUT-III Main Harness B

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STEP 1. Check with other meter. Check to see that the tachometer, fuel gauge and water thermometer are operating normally. Q: Do all other meters operate? YES < other meters all operate. >: Go to Step 2. NO < one or more of the other meters does not operate. >: Refer to «INSPECTION PROCEDURE 5: COMBINATION METER DOES NOT WORK.»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/gauges-instrument-panels/#combination-meter-vehicle-speed-sensor-evolution) .
STEP 2. Using scan tool MB991958, read the MFI system diagnostic trouble code (DTC). CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Read the MFI system diagnostic trouble code. Q: Is DTC P0500 output? YES: Refer to «MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#multiport-fuel-injection-20l-evolution) . NO: Go to Step 3.
STEP 3. Check combination meter connector C-01 and vehicle speed sensor connector B-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are combination meter connector C-01 and vehicle speed sensor connector B-04 in good condition? YES: Go to Step 4. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . The speedometer should work normally.
STEP 4. Check the wiring harness between combination meter connector C-01 (terminal 12) and vehicle speed sensor connector B-04 (terminal 3). NOTE: Also check joint connector C-21, intermediate connector B-27 and C-124 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector C-21, intermediate connector B-27 or C-124 are damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . Q: Is the wiring harness between combination meter connector C-01 (terminal 11) and vehicle speed sensor connector B-04 (terminal 3) in good condition? YES: Replace the combination meter. The speedometer should work normally. NO: Repair the wiring harness. The speedometer should work normally.

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Scheme 177: INSPECTION PROCEDURE 2: TACHOMETER DOES NOT WORK.

The tachometer power is supplied from the ignition switch (IG) circuit.
The tachometer calculates the engine revolution (r/min) according to the ECM signals to operate the needle.

The cause may be ECM signals are not transmitted, or combination meter error.

Malfunction of the combination meter (printed circuit board or speedometer and tachometer)
Malfunction of the ECM
Damaged wiring harness or connectors

Required Special Tools

MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991911: MUT-III Main Harness B

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Scheme 182

STEP 1. Check the other meters. Check to see that the speedometer, fuel gauge and water thermometer operate normally. Q: Do all other meters operate? YES < other meters all operate. >: Go to Step 2. NO < one of the meters do not operate. >: Refer to «INSPECTION PROCEDURE 5: COMBINATION METER DOES NOT WORK.»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/gauges-instrument-panels/#combination-meter-vehicle-speed-sensor-evolution) .
STEP 2. Using scan tool MB991958, read the MFI system diagnostic trouble code (DTC). CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Read the MFI system diagnostic trouble code. Q: Is DTC output to the MFI system? YES: Refer to «MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#multiport-fuel-injection-20l-evolution) . NO: Go to Step 3.
STEP 3. Check combination meter connector C-01 and ECM connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are combination meter connector C-01 and ECM connector C-117 in good condition? YES: Go to Step 4. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . The speedometer should work normally.
STEP 4. Check the wiring harness between combination meter connector C-01 (terminal 11) and ECM connector C-117 (terminal 58). NOTE: Also check joint connector C-105 and intermediate connector C-123 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector C-105 or intermediate connector C-123 are damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . Q: Are the wiring harness between combination meter connector C-01 (terminal 11) and ECM connector C-117 (terminal 58) in good condition? YES: Go to Step 5. NO: Repair the wiring harness. The speedometer should work normally.
STEP 5. Replace the combination meter and check operation. Q: Does the tachometer operate? YES: There is no action to be taken. NO: Replace the ECM. The tachometer should work normally.

Scheme 183

Scheme 183: INSPECTION PROCEDURE 3: FUEL GAUGE DOES NOT WORK.

The ignition switch (IG1) circuit is the power source for the fuel gauge.
The resistance value fluctuates causing the circuit current to fluctuate when the fuel level sensor the float moves up and down.
The fuel gauge moves the needle by the circuit current.

If the ignition switch (IG1) circuit is open, the gauge needle will not move at all. If the ground circuit is open, the gauge needle will move up to its extreme position.

Malfunction of the fuel level sensor (fuel gauge unit)
Malfunction of the combination meter (printed-circuit board or fuel gauge assembly)

Required Special Tool

MB991223: Harness Set

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Scheme 184: DIAGNOSIS

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STEP 1. Check with other meter. Check to see that the speedometer, fuel gauge and water thermometer operate normally. Q: Do all other meters operate? YES < other meters all operate. >: Go to Step 2. NO < one or more of the other meters does not operate. >: Refer to «INSPECTION PROCEDURE 5: COMBINATION METER DOES NOT WORK.»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/gauges-instrument-panels/#combination-meter-vehicle-speed-sensor-evolution) .
STEP 2. Check fuel level sensor (sub) connector D-10 and fuel level sensor (main) connector D-12 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are fuel level sensor (sub) connector D-10 and fuel level sensor (main) connector D-12 in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . The fuel gauge should work normally.
STEP 3. Check the fuel level sensor (sub) and fuel level sensor (main). Check to see that the fuel level sensor (sub) and fuel level sensor (main) are normal. Refer to «FUEL LEVEL SENSOR CHECK»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/gauges-instrument-panels/#combination-meter-vehicle-speed-sensor-evolution__fuel-level-sensor-check) . Q: Are fuel level sensor (sub) and fuel level sensor (main) normal? YES: Go to Step 4. NO: Replace fuel level sensor (sub) and fuel level sensor (main). The fuel gauge should work normally.
STEP 4. Check the ground circuit to the fuel level sensor (main). Measure the resistance at fuel level sensor (main) connector D-12. Disconnect fuel level sensor (main) connector D-12 and measure the resistance available at the wiring harness side of the connector. Measure the resistance value between terminal 1 and ground. The resistance should equal 2 ohms or less. Q: Is the measured resistance 2 ohms or less? YES: Go to Step 6 . NO: Go to Step 5.
STEP 5. Check the wiring harness between fuel level sensor (main) connector D-12 (terminal 1) and ground. NOTE: Also check intermediate connector D-34 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-34 is damaged, repair or replace the connector as described in GROUP 00E-2. Q: Is the wiring harness between fuel level sensor (main) connector D-12 (terminal 1) and ground in good condition? YES: There is no action to be taken. NO: Repair the wiring harness. The fuel gauge should work normally.
STEP 6. Check combination meter connector C-02 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is combination meter connector C-02 in good condition? YES: Go to Step 7. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . The fuel gauge should work normally.
STEP 7. Check the wiring harness between fuel level sensor (sub) connector D-10 (terminal 1) and combination meter connector C-02 (terminal 51). NOTE: Also check intermediate connectors C-113 and D-34 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-113 or D-34 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/oem-general-information/#general-evolution) . Q: Is the wiring harness between fuel level sensor (sub) connector D-10 (terminal 1) and combination meter connector C-02 (terminal 51) in good condition? YES: Go to Step 8. NO: Repair the wiring harness. The fuel gauge should work normally.
STEP 8. Check the wiring harness between fuel level sensor (sub) connector D-10 (terminal 2) and fuel level sensor (main) connector D-12 (terminal 2). Q: Is the wiring harness between fuel level sensor (sub) connector D-10 (terminal 2) and fuel level sensor (main) connector D-12 (terminal 2) in good condition? YES: Repair or replace the combination meter. The fuel gauge should work normally. NO: Repair the wiring harness. The fuel gauge should work normally.

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Scheme 195: INSPECTION PROCEDURE 4: ENGINE COOLANT TEMPERATURE GAUGE DOES NOT WORK.

The ignition switch (IG1) circuit is the power source for the engine coolant temperature gauge.
Resistance value, which the engine coolant temperature gauge unit sends to the combination meter, is dependent on temperature of the engine coolant. This causes circuit current to fluctuate.
The engine coolant temperature gauge moves the needle according to the circuit current.