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Headlight System - Lancer: Diagnosis Mitsubishi Lancer X рестайлинг

Headlights 33 illustrations ~13527 words

Troubleshooting Procedure For Discharge Headlight (Diagnostic Procedure For Malfunctions)

  1. Check that the connectors are connected securely and the fuse has not been blown.
  2. Before troubleshooting, read through the "Symptom chart" to understand what and how you should do. Follow all the procedures carefully.
  3. The components should be checked with their connectors disconnected.

SYMPTOM CHART

Item to be checkedTrouble symptom
The headlights do not illuminate.The headlights flicker.The headlights are dim.
Fuse1
Wiring harness and connector21
Column switch3
Bulb421
Controller532
ETACS-ECU64

SYMPTOM CHART

Note. The numbers indicate the sequence in which the component is checked. For the troubleshooting of other than the above, refer to TROUBLE SYMPTOM CHART . If ETACS-ECU fails, only the low-beam headlights will illuminate as a fail-safe measure.

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to TROUBLESHOOTING CONTENTS .

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

  1. MB991824: Vehicle Communication Interface (V.C.I.)
  2. MB991827: M.U.T.-III USB Cable
  3. MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
CAUTIONTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
  1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
  2. Start up the personal computer.
  3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
  4. Connect special tool MB991910 to special tool MB991824.
  5. Connect special tool MB991910 to the data link connector.
  6. Turn the power switch of special tool MB991824 to the "ON" position. NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
  7. Start the M.U.T.-III system on the personal computer.

Note. Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

Scheme 11

Scheme 11
Scheme 11

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES

Required Special Tools

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

  1. MB991824: Vehicle Communication Interface (V.C.I.)
  2. MB991827: M.U.T.-III USB Cable
  3. MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
CAUTIONTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Note. If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool MB991958 does not display.

  1. Connect scan tool MB991958 to the data link connector.
  2. Turn the ignition switch to the "ON" position.
  3. Select "System select" from the start-up screen.
  4. Select "From 2006 MY" of "Model Year." When the "Vehicle Information" is displayed, check the contents.
  5. Select "ETACS" from "System List", and press the "OK" button. NOTE: When the "Loading Option Setup" list is displayed, check the applicable item.
  6. Select "Diagnostic Trouble Code." to read the DTC.
  7. If a DTC is set, it is shown.
  8. Choose "Erase DTCs" to erase the DTC.

DIAGNOSTIC TROUBLE CODE CHART

CAUTIONOn troubleshooting, if the ignition switch is turned ON while disconnecting connector(s), diagnostic trouble code(s) associated with other system may be set. On completion, confirm all systems for diagnostic trouble code(s). If diagnostic trouble code(s) are set, erase them all.
DTC No.Diagnostic item
B16A2Blown turn-signal light (LH) bulb
B16A3Turn-signal light (LH) short circuit
B16A4Blown turn-signal light (RH) bulb
B16A5Turn-signal light (RH) short circuit

DIAGNOSTIC TROUBLE CODE CHART - ETACS-ECU

DTC No.Diagnostic item
L0432RLS (1) RS adaptation error
L0434RLS (1) light sensor error
L0436RLS (1) rain sensor error
(1) Rain light sensor (Lighting control sensor)
(1)Rain light sensor (Lighting control sensor)

DIAGNOSTIC TROUBLE CODE CHART - LIN

Scheme 12

Scheme 12: LANCER
Scheme 12: LANCER

Scheme 13

Scheme 13: LANCER SPORTBACK
Scheme 13: LANCER SPORTBACK

TROUBLE JUDGMENT

When the left bulb of turn-signal light is blown, the ETACS-ECU sets DTC B16A2.

TROUBLESHOOTING HINTS

  1. Malfunction of turn-signal light bulb (left)
  2. Malfunction of the ETACS-ECU
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17
  1. STEP 1. Bulb check. Check whether the left turn-signal light illuminates normally. Q: Is the check result normal? YES: Go to Step 2. NO: Replace the bulb of turn-signal light which does not illuminate.
  2. STEP 2. Check headlight assembly (LH) connector A-31 < front >, side turn-signal light (LH) connector A-08 < side >, rear combination light (LH) connector F-20 < LANCER (rear) >, rear turn-signal light (RH) connector F-39 < LANCER SPORTBACK (rear) > for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are headlight assembly (LH) connector A-31 < front >, side turn-signal light (LH) connector A-08 < side >, rear combination light (LH) connector F-20 < LANCER (rear) >, rear turn-signal light (RH) connector F-39 < LANCER SPORTBACK (rear) > in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  3. STEP 3. Resistance measurement at headlight assembly (LH) connector A-31 < front >, side turn-signal light (LH) connector A-08 < side >, and rear combination light (LH) connector F-20 < LANCER (rear) >, rear turn-signal light (RH) connector F-39 < LANCER SPORTBACK (rear) >. Disconnect the connector, and measure at the wiring harness side. Measure the resistance between the connector terminal of light which does not illuminate and ground. Measure the resistance between the headlight assembly (LH) connector A-31 (terminal 6) and body ground. < Front > Measure the resistance between side turn-signal light (LH) connector A-08 (terminal 1) and body ground. < Side > Measure the resistance between rear combination light (LH) connector F-20 (terminal 1) and body ground. < LANCER (Rear) > Measure the resistance between rear turn-signal light (LH) connector F-39 (terminal 1) and body ground. < LANCER SPORTBACK (Rear) > OK: The measured value should be continuity exists (2 ohms or less). Q: Does the measured resistance value correspond with this range? YES: Go to Step 5 . NO: Go to Step 4.
  4. STEP 4. Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 6) < front >, side turn-signal light (LH) connector A-08 (terminal 1) < side >, rear combination light (LH) connector F-20 (terminal 1) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 1) < LANCER SPORTBACK (rear) > and ground. Check the ground wires for open circuit. Q: Are the wiring harness between headlight assembly (LH) connector A-31 (terminal 6) < front >, side turn-signal light (LH) connector A-08 (terminal 1) < side >, rear combination light (LH) connector F-20 (terminal 1) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 1) < LANCER SPORTBACK (rear) > and ground in good condition? YES: Go to Step 7 . NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the headlights illuminate normally.
  5. STEP 5. Check ETACS-ECU connectors C-304 and C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are ETACS-ECU connectors C-304 < front or side > and C-311 < rear > in good condition? YES: Go to Step 6. NO: Replace the bulb(s) of the light that does not illuminate.
  6. STEP 6. Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 3) < front >, side turn-signal light (LH) connector A-08 (terminal 2) < side >, rear combination light (LH) connector F-20 (terminal 2) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 9) < front or side > or C-311 (terminal 18) < rear >. NOTE: Also check intermediate connector D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the power supply line for open circuit. Q: Are the wiring harness between headlight assembly (LH) connector A-31 (terminal 3) < front >, side turn-signal light (LH) connector A-08 (terminal 2) < side >, rear combination light (LH) connector F-20 (terminal 2) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 9) < front or side > or C-311 (terminal 18) < rear > in good condition? YES: Go to Step 7. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the headlights illuminate normally.
  7. STEP 7. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. 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. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check whether the ETACS-ECU DTC is set. Q: Is the DTC set? YES: Replace the ETACS-ECU. NO: The procedure is complete.

When the left wiring harness of turn-signal light is short circuited, the ETACS-ECU sets DTC B16A3.

  1. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  2. Malfunction of the ETACS-ECU

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Check headlight assembly (LH) connector A-31 < front >, side turn-signal light (LH) connector A-08 < side >, rear combination light (LH) connector F-20 < LANCER (rear) >, rear turn-signal light (RH) connector F-39 < LANCER SPORTBACK (rear) > for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are headlight assembly (LH) connector A-31 < front >, side turn-signal light (LH) connector A-08 < side >, rear combination light (LH) connector F-20 < LANCER (rear) >, rear turn-signal light (RH) connector F-39 < LANCER SPORTBACK (rear) > in good condition? YES: Go to Step 2. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  2. STEP 2. Check ETACS-ECU connectors C-304 and C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are ETACS-ECU connectors C-304 < front or side > and C-311 < rear > in good condition? YES: Go to Step 3. NO: Replace the bulb(s) of the light that does not illuminate.
  3. STEP 3. Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 3) < front >, side turn-signal light (LH) connector A-08 (terminal 2) < side >, rear combination light (LH) connector F-20 (terminal 2) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 9) < front or side > or C-311 (terminal 18) < rear >. NOTE: Also check intermediate connector D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the power supply line for short circuit. Q: Are the wiring harness between headlight assembly (LH) connector A-31 (terminal 3) < front >, side turn-signal light (LH) connector A-08 (terminal 2) < side >, rear combination light (LH) connector F-20 (terminal 2) < LANCER (rear) >, rear turn-signal light (LH) connector F-39 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 9) < front or side > or C-311 (terminal 18) < rear > in good condition? YES: Go to Step 4. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the headlights illuminate normally.
  4. STEP 4. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. 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. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Replace the ETACS-ECU. NO: The procedure is complete.

Scheme 18

Scheme 18: LANCER
Scheme 18: LANCER

Scheme 19

Scheme 19: LANCER SPORTBACK
Scheme 19: LANCER SPORTBACK

DIAGNOSTIC FUNCTION

When the right bulb of turn-signal light is blown, the ETACS-ECU sets DTC B16A4.

  1. Malfunction of turn-signal light bulb (right side)
  2. Malfunction of the ETACS-ECU
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Scheme 20

Scheme 20
Scheme 20

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22

Scheme 23

Scheme 23
Scheme 23
  1. STEP 1. Bulb check. Check whether the bulb of turn-signal light which does not illuminate is normal. Q: Is the check result normal? YES: Go to Step 2. NO: Replace the bulb of turn-signal light which does not illuminate.
  2. STEP 2. Check headlight assembly (RH) connector A-47 < front >, side turn-signal light (RH) connector A-01 < side >, rear combination light (RH) connector F-06 < LANCER (rear) >, rear turn-signal light (RH) connector F-36 < LANCER SPORTBACK (rear) > for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are headlight assembly (RH) connector A-47 < front >, side turn-signal light (RH) connector A-01 < side >, rear combination light (RH) connector F-06 < LANCER (rear) >, rear turn-signal light (RH) connector F-36 < LANCER SPORTBACK (rear) > in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  3. STEP 3. Resistance measurement at headlight assembly (RH) connector A-47 < front >, side turn-signal light (RH) connector A-01 < side >, rear combination light (RH) connector F-06 < LANCER (rear) >, and rear turn-signal light (RH) connector F-36 < LANCER SPORTBACK (rear) >. Disconnect the connector, and measure at the wiring harness side. Measure the resistance between the connector terminal of light which does not illuminate and body ground. Measure the resistance between the headlight assembly (RH) connector A-47 (terminal 6) and body ground. < Front > Measure the resistance between the side turn-signal light (RH) connector A-01 (terminal 1) and body ground. < side > Measure the resistance between the rear combination light (RH) connector F-06 (terminal 1) and body ground. < LANCER (rear) > Measure the resistance between the rear turn-signal light (RH) connector F-36 (terminal 1) and body ground. < LANCER SPORTBACK (rear) > OK: The measured value should be continuity exists (2 ohm or less). Q: Does the measured resistance value correspond with this range? YES: Go to Step 5 . NO: Go to Step 4.
  4. STEP 4. Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 6) < front >, side turn-signal light (RH) connector A-01 (terminal 1) < side >, rear combination light (RH) connector F-06 (terminal 1) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 1) < LANCER SPORTBACK (rear) > and ground. Check the ground wires for open circuit. Q: Are the wiring harness between headlight assembly (RH) connector A-47 (terminal 6) < front >, side turn-signal light (RH) connector A-01 (terminal 1) < side >, rear combination light (RH) connector F-06 (terminal 1) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 1) < LANCER SPORTBACK (rear) > and ground in good condition? YES: Go to Step 7 . NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
  5. STEP 5. Check ETACS-ECU connectors C-304 and C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are ETACS-ECU connectors C-304 and C-311 in good condition? YES: Go to Step 6. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  6. STEP 6. Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 3) < front >, side turn-signal light (RH) connector A-01 (terminal 2) < side >, rear combination light (RH) connector F-06 (terminal 2) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 16) < front or side > or C-311 (terminal 19) < rear >. NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the power supply line for open circuit. Q: Are the wiring harness between headlight assembly (RH) connector A-47 (terminal 3) < front >, side turn-signal light (RH) connector A-01 (terminal 2) < side >, rear combination light (RH) connector F-06 (terminal 2) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 16) < front or side > or C-311 (terminal 19) < rear > in good condition? YES: Go to Step 7. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
  7. STEP 7. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. 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. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Replace the ETACS-ECU. NO: The procedure is complete.

When the right wiring harness of turn-signal light is short circuited, the ETACS-ECU sets DTC B16A5.

  1. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  2. Malfunction of the ETACS-ECU

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Check headlight assembly (RH) connector A-47 < front >, side turn-signal light (RH) connector A-01 < side >, rear combination light (RH) connector F-06 < LANCER (rear) >, rear turn-signal light (RH) connector F-36 < LANCER SPORTBACK (rear) > for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are headlight assembly (RH) connector A-47 < front >, side turn-signal light (RH) connector A-01 < side >, rear combination light (RH) connector F-06 < LANCER (rear) >, rear turn-signal light (RH) connector F-36 < LANCER SPORTBACK (rear) > in good condition? YES: Go to Step 2. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  2. STEP 2. Check ETACS-ECU connectors C-304 and C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are ETACS-ECU connectors C-304 and C-311 in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  3. STEP 3. Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 3) < front >, side turn-signal light (RH) connector A-01 (terminal 2) < side >, rear combination light (RH) connector F-06 (terminal 2) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 16) < front or side > or C-311 (terminal 19) < rear >. NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the power supply line for short circuit. Q: Are the wiring harness between headlight assembly (RH) connector A-47 (terminal 3) < front >, side turn-signal light (RH) connector A-01 (terminal 2) < side >, rear combination light (RH) connector F-06 (terminal 2) < LANCER (rear) >, rear turn-signal light (RH) connector F-36 (terminal 2) < LANCER SPORTBACK (rear) > and ETACS-ECU connector C-304 (terminal 16) < front or side > or C-311 (terminal 19) < rear > in good condition? YES: Go to Step 4. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
  4. STEP 4. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. 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. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Replace the ETACS-ECU. NO: The procedure is complete.

When the lighting control sensor is installed with the wrong procedure, DTC L0432 is stored by LIN.

  1. Lighting control sensor improperly installed
  2. Lighting control sensor (rain sensor) abnormal operation

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. Disconnect the connector from the lighting control sensor, and connect the connector to the lighting control sensor again. Then, check again if the DTC is set to LIN. 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. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ." Disconnect the connector of lighting control sensor, and connect it again. NOTE: When connecting the connector, follow the correct installation procedure. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Go to Step 2. NO: The lighting control sensor is installed with the wrong procedure.
  2. STEP 2. Lighting control sensor installation surface check Visually check the presence of scratches or air bubbles < diameter of 5 mm (0.2 inch) or more > on the windshield to which the lighting control sensor is installed. In addition, visually check that the optical coupler is not broken and that the lighting control sensor can be installed. Q: Is the check result normal? YES: Go to Step 3. NO: Replace the windshield (Refer to «WINDSHIELD»(ref-592680-S36309957222014011000000) )
  3. STEP 3. Using scan tool MB991958, Check whether the diagnostic trouble code is reset. Check again if the DTC is set to LIN. Wipe the windshield surface of the lighting control sensor section thoroughly, and check that the surface is dry. Then, perform the lighting control sensor (rain sensor) adaptation. < Refer to «LIGHTING CONTROL SENSOR (RAIN SENSOR) ADAPTATION»(ref-592630-S39518528672014011000000) >. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Replace the lighting control sensor. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ).

If a trouble occurs in the lighting control sensor, DTC L0434 and L0436 are stored to LIN.

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Using scan tool MB991958, Check whether the diagnostic trouble code is reset.

Check again if the DTC is set to LIN.

CAUTIONTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
  1. Connect scan tool MB991958. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592608-S09824045912014011000000) ."
  2. Erase the DTC.
  3. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
  4. Check if DTC is set.

Q: Is the DTC set?

  1. YES: Replace the lighting control sensor.
  2. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ).

TROUBLE SYMPTOM CHART

Trouble symptomInspection Procedure
Headlight and taillightNone of headlights (low-beam) illuminates.Refer to INSPECTION PROCEDURE 1: NONE OF HEADLIGHTS (LOW-BEAM) ILLUMINATES.
None of headlights (high-beam) illuminates.Refer to INSPECTION PROCEDURE 2: NONE OF HEADLIGHTS (HIGH-BEAM) ILLUMINATES.
The headlights illuminate left-beam (high-beam does not illuminate) regardless of the lighting switch positions.Refer to INSPECTION PROCEDURE 3: THE HEADLIGHTS ILLUMINATE AT LOW-BEAM (HIGH-BEAM DOES NOT ILLUMINATE) REGARDLESS OF THE LIGHTING SWITCH POSITIONS.
Headlights do not illuminate when the passing switch is operated.Refer to INSPECTION PROCEDURE 4: HEADLIGHTS DO NOT ILLUMINATE WHEN THE PASSING SWITCH IS OPERATED.
One of the headlights does not illuminate.Refer to INSPECTION PROCEDURE 5: ONE OF THE HEADLIGHT(S) DOES NOT ILLUMINATE.
High-beam indicator light does not illuminate normally.Refer to INSPECTION PROCEDURE 6: HIGH-BEAM INDICATOR LIGHT DOES NOT ILLUMINATE NORMALLY.
The headlight automatic shutdown function does not work normally.Refer to INSPECTION PROCEDURE 7: THE HEADLIGHT AUTOMATIC SHUTDOWN FUNCTION DOES NOT WORK NORMALLY.
Daytime running light function does not work normally.Halogen type headlightRefer to INSPECTION PROCEDURE 8: DAYTIME RUNNING LIGHT FUNCTION DOES NOT WORK NORMALLY. < HALOGEN TYPE HEADLIGHT >
Discharge type headlightRefer to INSPECTION PROCEDURE 8: DAYTIME RUNNING LIGHT FUNCTION DOES NOT WORK NORMALLY. < DISCHARGE TYPE HEADLIGHT >
One of the tail lights, side marker lights or the license plate lights does not Illuminate.Refer to INSPECTION PROCEDURE 9: ONE OF THE POSITION LIGHT, THE TAILLIGHT, THE REAR SIDE MARKER LIGHTS OR THE LICENSE PLATE LIGHT DOES NOT ILLUMINATE.
The auto light function does not work normally.Refer to INSPECTION PROCEDURE 10: THE AUTO LIGHT FUNCTION DOES NOT WORK NORMALLY.
Turn-signal lightNone of turn-signal lights illuminates.Refer to INSPECTION PROCEDURE 11: NONE OF TURN-SIGNAL LIGHTS ILLUMINATES.
The comfort flashing function does not work normally.Refer to INSPECTION PROCEDURE 12: THE COMFORT FLASHING FUNCTION DOES NOT WORK NORMALLY.
The turn-signal indicator lights do not illuminate.Refer to INSPECTION PROCEDURE 13: THE TURN-SIGNAL INDICATOR LIGHTS DO NOT ILLUMINATE.
The welcome light function does not work normally.Refer to INSPECTION PROCEDURE 14: THE WELCOME LIGHT FUNCTION DOES NOT WORK NORMALLY.
The coming home light function does not work normally.Refer to INSPECTION PROCEDURE 15: THE COMING HOME LIGHT FUNCTION DOES NOT WORK NORMALLY.

TROUBLE SYMPTOM CHART

Inspection Procedure 1: None Of Headlights (Low-Beam) Illuminates

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 24

Scheme 24
Scheme 24

Scheme 25

Scheme 25
Scheme 25
  1. Malfunction of column switch
  2. Malfunction of headlight relay (LOW)
  3. Malfunction of the ETACS-ECU
  4. Damaged harness wires and connectors

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  1. MB991824: Vehicle Communication Interface (V.C.I.)
  2. MB991827 M.U.T.-III USB Cable
  3. MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 2.
  2. STEP 2. Using scan tool MB991958, check data list Use the ETACS-ECU service data to check the signals related to the operation of headlight function. Turn the headlight switch to the ON position. HEADLIGHT SWITCH CONDITION Item No. Item name Normal condition Item 341 Headlight switch ON Q: Do scan tool MB991958 display the items "Headlight switch" as normal condition? YES: Go to Step 3. NO: Troubleshoot the ETACS-ECU. Refer to «DIAGNOSIS»(ref-592558-S04424555492014011000000) .
  3. STEP 3. Check headlight relay (LOW) connector A-25X for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is headlight relay (LOW) connector A-25X in good condition? YES < Halogen type >: Go to Step 5 . YES < Discharge type >: Go to Step 4. NO: Repair the damaged parts.
  4. STEP 4. Check of headlight relay (LOW) Refer to «HEADLIGHT RELAY CHECK»(ref-592608-S20756363542014011000000) . Q: Is the headlight relay (LOW) in good condition? YES: Go to Step 5. NO: Replace the headlight relay (LOW). Verify that the high-beam headlights illuminate normally.
  5. STEP 5. Check the battery power supply circuit to the headlight relay (LOW). Measure the voltage at headlight relay (LOW) connector A-25X. CAUTION: The top and bottom of the headlight relay (LOW) are difficult to identify. Prior to inspection, confirm the triangle mark on the relay box. Disconnect headlight relay (LOW) connector A-25X and measure the voltage available at the relay box side of the connector. Measure the voltage between terminal 4 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts (battery positive voltage)? YES: Go to Step 6. NO: Go to Step 8 .
  6. STEP 6. Check ETACS-ECU connector C-312 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-312 in good condition? YES: Go to Step 7. NO: Repair the damaged parts.
  7. STEP 7. Check the wiring harness between headlight relay (LOW) connector A-25X (terminal 1) and ETACS-ECU connector C-312 (terminal 6). Check the output line for open circuit. Q: Is the wiring harness between headlight relay (LOW) connector A-25X (terminal 1) and ETACS-ECU connector C-312 (terminal 6) in good condition? YES: Go to Step 9 . NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the low-beam headlights illuminate normally.
  8. STEP 8. Check the wiring harness between headlight relay (LOW) connector A-25X (terminal 4) and the fusible link (36). Check the power supply line for open circuit. Q: Is the wiring harness between headlight relay (LOW) connector A-25X (terminal 4) and fusible link (36) in good condition? YES: Go to Step 9. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the low-beam headlights illuminate normally.
  9. STEP 9. Temporarily replace the headlight relay (LOW), and retest the system. Temporarily replace the headlight relay (LOW), check that the headlights (low-beam) illuminate normally. Q: Does the headlights (low-beam) do not illuminate in good condition? YES: Replace the headlight relay (LOW). NO: Replace the ETACS-ECU.

Inspection Procedure 2: None Of Headlights (High-Beam) Illuminates

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 26

Scheme 26
Scheme 26
  1. Malfunction of column switch
  2. Malfunction of headlight relay (HIGH)
  3. Malfunction of the ETACS-ECU
  4. Damaged harness wires and connectors

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 2.
  2. STEP 2. Using scan tool MB991958, check data list Use the ETACS-ECU service data to check the signals related to the operation of headlight function. Turn the headlight switch to the ON position. HEADLIGHT SWITCH CONDITION Item No. Item name Normal condition Item 341 Headlight switch ON Turn the passing switch to the ON position. PASSING SWITCH CONDITION Item No. Item name Normal condition Item 350 Headlight switch (flasher) ON Q: Do scan tool MB991958 display the items "Headlight switch" and "Headlight switch (flasher)" as normal condition? YES: (Normal conditions are displayed for all items.) Go to Step 3. NO: (Normal condition is not displayed.) Troubleshoot the ETACS-ECU. Refer to «DIAGNOSIS»(ref-592558-S04424555492014011000000) .
  3. STEP 3. Check headlight relay (HIGH) connector A-17X for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is headlight relay (HIGH) connector A-17X in good condition? YES: Go to Step 4. NO: Repair the damaged parts.
  4. STEP 4. Check of headlight relay (HIGH) Refer to «HEADLIGHT RELAY CHECK»(ref-592608-S20756363542014011000000) . Q: Is the headlight relay (HIGH) in good condition? YES: Go to Step 5. NO: Replace the headlight relay (HIGH). Verify that the high-beam headlights illuminate normally.
  5. STEP 5. Check the battery power supply circuit to the headlight relay (HIGH). Measure the voltage at headlight relay (HIGH) connector A-17X CAUTION: The top and bottom of the headlight relay (HIGH) are difficult to identify. Prior to inspection, confirm the triangle mark on the relay box. Disconnect headlight relay (HIGH) connector A-17X and measure the voltage available at the relay box side of the connector. Measure the voltage between terminal 2/4 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts (battery positive voltage)? YES: Go to Step 6. NO: Go to Step 8 .
  6. STEP 6. Check ETACS-ECU connector C-312 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-312 in good condition? YES: Go to Step 7. NO: Repair the damaged parts.
  7. STEP 7. Check the wiring harness between headlight relay (HIGH) connector A-17X (terminal 1) and ETACS-ECU connector C-312 (terminal 13). Check the output line for open circuit. Q: Is the wiring harness between headlight relay (HIGH) connector A-17X (terminal 1) and ETACS-ECU connector C-312 (terminal 13) in good condition? YES: Go to Step 9 . NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the high-beam headlights illuminate normally.
  8. STEP 8. Check the wiring harness between headlight relay (HIGH) connector A-17X (terminal 2/4) and the fusible link (36). Check the power supply line for open circuit. Q: Is the wiring harness between headlight relay (HIGH) connector A-17X (terminal 2/4) and fusible link (36) in good condition? YES: Go to Step 9. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the high-beam headlights illuminate normally.
  9. STEP 9. Retest the system Q: Does the headlights (high-beam) do not illuminate in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Inspection Procedure 3: The Headlights Illuminate At Low-Beam (High-Beam Does Not Illuminate) Regardless Of The Lighting Switch Positions

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of column switch
  2. Malfunction of the ETACS-ECU
  3. Damaged harness wires and connectors

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 2.
  2. STEP 2. Retest the system Q: Do the headlights illuminate normally? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Inspection Procedure 4: Headlights Do Not Illuminate When The Passing Switch Is Operated

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of column switch
  2. Malfunction of the ETACS-ECU
  3. Damaged harness wires and connectors

Required Special Tools

  1. MB991223: Harness set
  2. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Check that the headlights operate. Check that the low-beam and high-beam headlights illuminate normally. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to «INSPECTION PROCEDURE 1 "NONE OF HEADLIGHTS (LOW-BEAM) ILLUMINATES."»(ref-592608-S22076798142014011000000) and «INSPECTION PROCEDURE 2 "NONE OF HEADLIGHTS (HIGH-BEAM) ILLUMINATES."»(ref-592608-S13810801452014011000000) .
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 3.
  3. STEP 3. Retest the system Q: Do the headlights (low-beam and high-beam) illuminate normally when turning ON the passing switch? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Scheme 27

Scheme 27: Inspection Procedure 5: One Of The Headlight(s) Does Not Illuminate
Scheme 27: Inspection Procedure 5: One Of The Headlight(s) Does Not Illuminate

Scheme 28

Scheme 28
Scheme 28
  1. Malfunction of the headlight bulbs
  2. Malfunction of the headlight assembly
  3. Damaged harness wires and connectors

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  1. STEP 1. Check headlight assembly connector A-31 < LH > or A-47 < RH >, for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is headlight assembly connector A-31 < LH > or A-47 < RH > in good condition? YES: Go to Step 2. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  2. STEP 2. Check bulb. Check the bulb(s) of headlight that does not illuminate. NOTE: If discharge-type lower beam headlights do not illuminate, their bulbs cannot be inspected. In this case, assume the bulbs to be normal and proceed with steps. Q: Is the bulb in good condition? YES: Go to Step 3. NO: Replace the bulb(s) of the light that does not illuminate.
  3. STEP 3. Check the wiring harness between headlight assembly connector and headlight relay connector. Check the power supply line for open circuit. Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 2) and headlight relay (LOW) connector A-25X (terminal 3). < LH-LOW > Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 1) and headlight relay (HIGH) connector A-17X (terminal 3). < LH-HIGH > Check the wiring harness between headlight assembly (LH) connector A-31 (terminal 6) and ground. < LH-LOW and HIGH > Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 2) and headlight relay (LOW) connector A-25X (terminal 3). < RH-LOW > Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 1) and headlight relay (HIGH) connector A-17X (terminal 3). < RH-HIGH > Check the wiring harness between headlight assembly (RH) connector A-47 (terminal 6) and ground. < RH-LOW and HIGH > Q: Is the wiring harness between headlight assembly connector and headlight relay connector in good condition? YES: Replace the headlight assembly that does not illuminate. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the headlights illuminate normally.

Inspection Procedure 6: High-Beam Indicator Light Does Not Illuminate Normally

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 29

Scheme 29
Scheme 29
  1. Malfunction of the ETACS-ECU
  2. Malfunction of combination meter
  3. Damaged harness wires and connectors

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Check of headlight (high-beam). Check that the headlights (high-beam) illuminate/extinguish normally when the lighting switch is operated. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to «INSPECTION PROCEDURE 2 "NONE OF HEADLIGHTS (HIGH-BEAM) ILLUMINATES»(ref-592608-S13810801452014011000000) ."
  2. STEP 2. Using scan tool MB991958, diagnose the CAN bus line. 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. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 3. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592553-S00268715102014011000000) ).
  3. STEP 3. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Connect scan tool MB991958. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 4.
  4. STEP 4. Using scan tool MB991958, check actuator test. Turn the ignition switch to the "ON" position. Perform the actuator test for the combination meter, and check that the high-beam indicator light illuminates (Refer to combination meter «ACTUATOR TEST TABLE < VEHICLES WITHOUT COLOR LIQUID CRYSTAL DISPLAY >»(ref-592561-S08260754522014011000000) ). Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result normal? YES: Replace the ETACS-ECU. NO: Replace the combination meter.

Inspection Procedure 7: The Headlight Automatic Shutdown Function Does Not Work Normally

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of front door switch (LH)
  2. Malfunction of the ETACS-ECU
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, Check the configuration function. Use the ETACS-ECU configuration function to check that the "Head light auto cut customize" is set to "Enable (C-spec.)" 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. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Use the ETACS-ECU configuration function to check that the "Headlight auto cut customize" is set to "C-spec." Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result normal? YES: Go to Step 2. NO: Use the ETACS-ECU configuration function to set the "Headlight auto cut customize" to "Enable (C-spec.)" (Refer to «CUSTOMIZATION FUNCTION»(ref-592608-S29405535172014011000000) ).
  2. STEP 2. Using scan tool MB991958, read the diagnostic trouble code. Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ). NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, check data list. Use the ETACS-ECU service data to check the signals related to the operation of headlight automatic shutdown function. Turn the ignition switch to the LOCK (OFF) position. Illuminate the headlights. HEADLIGHT CONDITIONS Item No. Item name Normal condition Item 206 Head light LO ON duty 100% Item 254 IG voltage 1 V or less Open the driver's door. DOOR AJAR SWITCH CONDITIONS Item No. Item name Normal condition Item 256 Dr door ajar switch Open Q: Does scan tool MB991958 display the items "Head light LO ON duty", "IG voltage" and "Dr door ajar switch" as normal condition? YES: Go to Step 4. NO: Troubleshoot the ETACS-ECU. Refer to «DIAGNOSIS»(ref-592558-S04424555492014011000000) .
  4. STEP 4. Retest the system Check that the headlight automatic shutdown function works normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Inspection Procedure 8: Daytime Running Light Function Does Not Work Normally - Halogen Type Headlight

CAUTIONWhenever the ECU is replaced, ensure that the input and output signal circuits are normal.

Scheme 30

Scheme 30
Scheme 30
  1. Trouble in input signal system
  2. Malfunction of headlight relay (LOW)
  3. Malfunction of the ETACS-ECU
  4. Damaged harness wires and connectors

Required Special Tools

  1. MB991223: Harness Set
  2. MB992006: Extra Fine Probe
  3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
  1. STEP 1. Verify the headlight (low-beam) operation. Check to see that the headlight (low-beam) lights up properly when operating the dimmer switch while the headlight switch is ON. Q: Do the headlights (low-beam) illuminate normally? YES: Go to Step 2. NO: Refer to «INSPECTION PROCEDURE 1 "NONE OF HEADLIGHTS (LOW-BEAM) ILLUMINATES»(ref-592608-S22076798142014011000000) ."
  2. STEP 2. Using scan tool MB991958, diagnose the CAN bus line. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 3. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592553-S00268715102014011000000) ).
  3. STEP 3. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check whether ETACS-ECU DTCs are set. Turn the ignition switch to the "ON" position. Check for ETACS-ECU DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 4.
  4. STEP 4. Using scan tool MB991958, read the MFI system diagnostic trouble code. Check whether engine control module DTCs are set or not. Turn the ignition switch to the "ON" position. Check for engine control module DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the MFI system. Refer to «DIAGNOSIS»(ref-592554-S34172480472014011000000) . < 2.0L Engine non-turbo >, «DIAGNOSIS»(ref-592555-S21340300262014011000000) . < 2.0L Engine turbo >, «DIAGNOSIS»(ref-592556-S26682004632014011000000) . < 2.4L Engine > NO: Go to Step 5.
  5. STEP 5. Check the parking brake switch. Check the input signals from the parking brake switch. Turn the ignition switch to the "ON" position. Check that the brake warning light on the combination meter goes off when the parking brake lever is released. Turn the ignition switch to the "LOCK" (OFF) position. Q: Does the brake warning light go off? YES: Go to Step 6. NO: Refer to «INSPECTION PROCEDURE 2: WHEN THE PARKING BRAKE LEVER IS PULLED, THE BRAKE WARNING LIGHT DOES NOT ILLUMINATE»(ref-592606-S19392295942014011000000) . Verify that the daytime running light function does not work normally.
  6. STEP 6. Temporarily replace the headlight relay (LOW), and retest the system. After temporarily replacing the headlight relay (LOW), with the ignition switch being in the ON position (engine is running), release the parking brake (parking brake switch: OFF) and turn the lighting switch to the OFF or TAIL position, and then check if the headlights (low-beam) illuminate with a reduced beam state. Q: Does the headlights (low-beam) do not illuminate in good condition? YES: Replace the headlight relay (LOW). NO: Replace the ETACS-ECU.

Inspection Procedure 8: Daytime Running Light Function Does Not Work Normally - Discharge Type Headlight

CAUTIONWhenever the ECU is replaced, ensure that the input and output signal circuits are normal.

Scheme 31

Scheme 31
Scheme 31

COMMENTS ON TROUBLE SYMPTOM

If the daytime running lights do not illuminate, the wiring harness connector(s), the bulb or the ETACS-ECU may have a problem.

Required Special Tools

  1. MB991223: Harness Set
  2. MB992006: Extra Fine Probe
  3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

Scheme 32

Scheme 32
Scheme 32

Scheme 33

Scheme 33
Scheme 33
  1. STEP 1. Check that the tail/stop lights and headlights operate. Check that the tail/stop lights and headlights illuminate normally. Q: Do the tail/stop lights and headlights operate normally? YES: Go to Step 2. NO: Check the tail/stop lights and the headlights (Refer to «TROUBLE SYMPTOM CHART»(ref-592608-S07559379362014011000000) ).
  2. STEP 2. Check the daytime running light bulb. Remove the daytime running light bulb. Verify that the daytime running light bulb is not damaged or burned out. Q: Is the daytime running light bulb in good condition? YES: Go to Step 3. NO: Replace the fog light bulb. Verify that the daytime running lights illuminate normally.
  3. STEP 3. Using scan tool MB991958, diagnose the CAN bus line. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 4. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592553-S00268715102014011000000) ).
  4. STEP 4. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check whether ETACS-ECU DTCs are set. Turn the ignition switch to the "ON" position. Check for ETACS-ECU DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 5.
  5. STEP 5. Using scan tool MB991958, read the MFI system diagnostic trouble code. Check whether engine control module DTCs are set or not. Turn the ignition switch to the "ON" position. Check for engine control module DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the MFI system. Refer to «DIAGNOSIS»(ref-592554-S34172480472014011000000) . < 2.0L Engine non-turbo >, «DIAGNOSIS»(ref-592555-S21340300262014011000000) . < 2.0L Engine turbo >, «DIAGNOSIS»(ref-592556-S26682004632014011000000) . < 2.4L Engine >. NO: Go to Step 6.
  6. STEP 6. Check the parking brake switch. Check the input signals from the parking brake switch. Turn the ignition switch to the "ON" position. Check that the brake warning light on the combination meter goes off when the parking brake lever is released. Turn the ignition switch to the "LOCK" (OFF) position. Q: Does the brake warning light go off? YES: Go to Step 7. NO: Refer to «INSPECTION PROCEDURE 2: WHEN THE PARKING BRAKE LEVER IS PULLED, THE BRAKE WARNING LIGHT DOES NOT ILLUMINATE»(ref-592606-S19392295942014011000000) . Verify that the daytime running light function does not work normally.
  7. STEP 7. Check daytime running light (LH) connector A-32, daytime running light (RH) A-46 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is daytime running light (LH) connector A-32, daytime running light (RH) A-46 in good condition? YES: Go to Step 8. NO: Repair the damaged parts.
  8. STEP 8. Check the ground circuit to the daytime running light (LH) or daytime running light (RH). Measure the resistance at daytime running light (LH) connector A-32 or daytime running light (RH) connector A-46. Disconnect the connector, and measure at the wiring harness side. Check the resistance between the fog light connector and ground. Resistance between A-32 daytime running light (LH) connector terminal No. 4 and ground Resistance between A-46 daytime running light (RH) connector terminal No. 4 and ground OK: The measured value should be continuity exists (2 ohms or less). Q: Is the measured resistance 2 ohms or less? YES: Go to Step 10 . NO: Go to Step 9.
  9. STEP 9. Check the wiring harness between daytime running light (LH) connector A-32 (terminal 4) or daytime running light (RH) connector A-46 (terminal 4) and ground. Check the ground wires for open circuit. Q: Is the wiring harness between daytime running light (LH) connector A-32 (terminal 4) or daytime running light (RH) connector A-46 (terminal 4) and ground in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the daytime running lights illuminate normally.
  10. STEP 10. Check daytime running light relay connector A-20X for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is daytime running light relay connector A-20X in good condition? YES: Go to Step 11. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  11. STEP 11. Check the daytime running light relay. Refer to «HEADLIGHT RELAY CHECK»(ref-592608-S20756363542014011000000) . Q: Is the daytime running light relay in good condition? YES: Go to Step 12. NO: Replace the daytime running light relay. Verify that the daytime running lights illuminate normally.
  12. STEP 12. Check the battery power supply circuit to the daytime running light relay. Measure the voltage at daytime running light relay connector A-20X. CAUTION: The top and bottom of the daytime running light relay are difficult to identify. Prior to inspection, confirm the triangle mark on the relay box. Disconnect daytime running light relay connector A-20X and measure the voltage available at the relay box side of the connector. Measure the voltage between terminal 2 and ground, and also between terminal 4 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts (battery positive voltage)? YES: Go to Step 14 . NO: Go to Step 13.
  13. STEP 13. Check the wiring harness between daytime running light relay connector A-20X (terminal 2 and 4) and fusible link (36). Check the power supply line for open circuit. Q: Is the wiring harness between daytime running light relay connector A-20X (terminal 2 and 4) and fusible link (36) in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the daytime running lights illuminate normally.
  14. STEP 14. Check ETACS-ECU connector C-312 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-312 in good condition? YES: Go to Step 15. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  15. STEP 15. Check the wiring harness between daytime running light relay connector A-20X (terminal 1) and ETACS-ECU connector C-312 (terminal 10). Check the communication wires for open circuit. Q: Is the wiring harness between daytime running light relay connector A-20X (terminal 1) and ETACS-ECU connector C-312 (terminal 10) in good condition? YES: Go to Step 16. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the daytime running lights illuminate normally.
  16. STEP 16. Retest the system. Q: Does the daytime running lights illuminate in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Scheme 34

Scheme 34: LANCER
Scheme 34: LANCER

Scheme 35

Scheme 35: LANCER SPORTBACK
Scheme 35: LANCER SPORTBACK
  1. Malfunction of bulbs
  2. Malfunction of rear combination light
  3. Malfunction of rear combination light harness
  4. Malfunction of taillight
  5. Malfunction of license plate light
  6. Malfunction of headlight
  7. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set

Scheme 36

Scheme 36
Scheme 36

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38

Scheme 39

Scheme 39
Scheme 39

Scheme 40

Scheme 40
Scheme 40

Scheme 41

Scheme 41
Scheme 41

Scheme 42

Scheme 42
Scheme 42
  1. STEP 1. Bulb check. Check the bulb(s) of the light that does not illuminate. Q: Is the check result normal? YES < LANCER >: Go to Step 2. YES < LANCER SPORTBACK >: Go to Step 8 . NO: Replace the bulb(s) of the light that does not illuminate.
  2. STEP 2. Check headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH) for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH) in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  3. STEP 3. Resistance measurement at headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH). Disconnect the connector, and measure at the wiring harness side. Measure the resistance between the connector of light which does not illuminate and the body ground. Measure the resistance between headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH) (terminal 6) and body ground. Measure the resistance between rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH) (terminal 1) and body ground. Measure the resistance between taillight connector F-18 (LH) or F-07 (RH) (terminal 1) and body ground. Measure the resistance between license plate light connector F-13 (LH) or F-11 (RH) (terminal 1) and body ground. OK: The measured value should be continuity exists (2 ohms or less). Q: Does the measured resistance value correspond with this range? YES: Go to Step 5 . NO: Go to Step 4.
  4. STEP 4. Check the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and the body ground. Check the ground line for open circuit. Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 6) and the body ground. Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 6) and the body ground. Check the wiring harness between rear combination light (taillight/rear side marker light: LH) connector F-20 (terminal 1) and the body ground. Check the wiring harness between rear combination light (taillight/rear side marker light: RH) connector F-06 (terminal 1) and the body ground. Check the wiring harness between taillight (LH) connector F-18 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-23 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between taillight (RH) connector F-07 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-23 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (LH) connector F-13 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-15 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (RH) connector F-11 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-15 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Q: Is the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and the body ground in good condition? YES: Go to Step 7 . NO: Repair the wiring harness.
  5. STEP 5. Check ETACS-ECU connector C-304 or C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-304 or C-311 in good condition? YES: Go to Step 6. NO: Repair the damaged parts.
  6. STEP 6. Check wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and ETACS-ECU connector. Check the power supply line for open circuit or short circuit. Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 4) and ETACS-ECU connector C-304 (terminal 3). Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 4) and ETACS-ECU connector C-304 (terminal 7). Check the wiring harness between rear combination light (taillight/rear side marker light: LH) connector F-20 (terminal 3) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between rear combination light (taillight/rear side marker light: RH) connector F-06 (terminal 3) and ETACS-ECU connector C-311 (terminal 13). NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between taillight (LH) connector F-18 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 and F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-23 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between taillight (RH) connector F-07 (terminal 2) and ETACS-ECU connector C-311 (terminal 13). NOTE: Also check intermediate connectors D-14 and F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-23 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (LH) connector F-13 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 and F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-15 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (RH) connector F-11 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 and F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-15 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Q: Is the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and ETACS-ECU connector in good condition? YES: Go to Step 7. NO: Repair the wiring harness.
  7. STEP 7. Retest the system. Check that the position light, taillight, rear side marker light, or license plate light illuminate normally. Q: Do the position light, taillight, rear side marker light, or license plate light work normally? YES (The light illuminate normally.): The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO < When the position light does not illuminate >: Replace the position light socket. NO < When the rear combination light (taillight/rear side marker light) do not illuminate >: Replace the rear combination light socket. NO < When the taillight do not illuminate >: Replace the taillight socket. NO < When the license plate light does not illuminate >: Replace the license plate light socket.
  8. STEP 8. Check headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH) for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH) in good condition? YES: Go to Step 9. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) .
  9. STEP 9. Resistance measurement at headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH). Disconnect the connector, and measure at the wiring harness side. Measure the resistance between the connector of light which does not illuminate and the body ground. Measure the resistance between headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH) (terminal 6) and body ground. Measure the resistance between rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH) (terminal 3) and body ground. Measure the resistance between rear side marker light connector F-40 (LH) or F-35 (RH) (terminal 1) and body ground. Measure the resistance between license plate light connector F-13 (LH) or F-11 (RH) (terminal 1) and body ground. OK: The measured value should be continuity exists (2 ohms or less). Q: Does the measured resistance value correspond with this range? YES: Go to Step 11 . NO: Go to Step 10.
  10. STEP 10. Check the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and the body ground. Check the ground line for open circuit. Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 6) and the body ground. Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 6) and the body ground. Check the wiring harness between rear combination light connector F-20 (taillight: LH) (terminal 3) and the body ground. Check the wiring harness between rear combination light connector F-06 (taillight: RH) (terminal 3) and the body ground. Check the wiring harness between rear side marker light connector F-40 (LH) (terminal 1) and the body ground. Check the wiring harness between rear side marker light connector F-35 (RH) (terminal 1) and the body ground. Check the wiring harness between license plate light (LH) connector F-13 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-30 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (RH) connector F-11 (terminal 1) and the body ground. NOTE: Also check intermediate connector F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-30 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Q: Is the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and the body ground in good condition? YES: Go to Step 13 . NO: Repair the wiring harness.
  11. STEP 11. Check ETACS-ECU connector C-304 or C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-304 or C-311 in good condition? YES: Go to Step 12. NO: Repair the damaged parts.
  12. STEP 12. Check wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and ETACS-ECU connector. Check the power supply line for open circuit or short circuit. Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 4) and ETACS-ECU connector C-304 (terminal 3). Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 4) and ETACS-ECU connector C-304 (terminal 7). Check the wiring harness between rear combination light (taillight: LH) connector F-20 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between rear combination light (taillight: RH) connector F-06 (terminal 2) and ETACS-ECU connector C-311 (terminal 13). NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between rear side marker light (LH) connector F-40 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connector D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between rear side marker light (RH) connector F-35 (terminal 2) and ETACS-ECU connector C-311 (terminal 13). NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (LH) connector F-13 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 and F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-30 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Check the wiring harness between license plate light (RH) connector F-11 (terminal 2) and ETACS-ECU connector C-311 (terminal 10). NOTE: Also check intermediate connectors D-14 and F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-30 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592557-S11382637462014011000000) . Q: Is the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and ETACS-ECU connector in good condition? YES: Go to Step 13. NO: Repair the wiring harness.
  13. STEP 13. Retest the system. Check that the position light, taillight, rear side marker light, or license plate light illuminate normally. Q: Do the position light, taillight, rear side marker light, or license plate light work normally? YES (The light illuminate normally.): The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO < When the position light does not illuminate >: Replace the position light socket. NO < When the rear combination light (taillight) do not illuminate >: Replace the rear combination light socket. NO < When the rear side marker light do not illuminate >: Replace the rear side marker light socket. NO < When the license plate light does not illuminate >: Replace the license plate light socket.

Inspection Procedure 10: The Auto Light Function Does Not Work Normally

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of the lighting control sensor
  2. Malfunction of the column switch
  3. Malfunction of the ETACS-ECU
  4. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958 Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827 M.U.T.-III USB Cable MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line 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. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592553-S00268715102014011000000) ).
  2. STEP 2. Using scan tool MB991958, read the diagnostic trouble code. Check if DTC is set to the LIN. Q: Is the DTC set? YES: Refer to «DTC CHART»(ref-592608-S13824884972014011000000) . NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, read the ETACS diagnostic trouble code. Check if DTC is set to the ETACS-ECU. Q: Is the DTC set? YES: Troubleshoot the ETACS (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ). NO: Go to Step 4.
  4. STEP 4. Check that the headlights operate. Check that the headlights (low-beam) illuminate normally. Q: Is the check result normal? YES: Go to Step 5. NO: Refer to «INSPECTION PROCEDURE 1 "NONE OF HEADLIGHTS (LOW-BEAM) ILLUMINATES."»(ref-592608-S22076798142014011000000) .
  5. STEP 5. Using scan tool MB991958, check data list Use the ETACS-ECU service data to check the signals related to the operation of auto light function. Turn the lighting switch to the "AUTO" position. AUTO LIGHT CONDITION Item No. Item name Normal condition Item 348 Headlight switch (auto) ON Q: Do scan tool MB991958 display the items "Headlight switch (auto)" as normal condition? YES: Go to Step 6. NO: Troubleshoot the ETACS-ECU. Refer to ETACS, «DIAGNOSIS»(ref-592558-S04424555492014011000000) .
  6. STEP 6. Lighting control sensor check Check the lighting control sensor. Refer to «LIGHTING CONTROL SENSOR (LIGHT SENSOR) CHECK»(ref-592608-S19746904482014011000000) . Q: Is the check result normal? YES: Go to Step 7. NO: Replace the lighting control sensor.
  7. STEP 7. Retest the system Check that the auto light function works normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.
  1. Malfunction of column switch
  2. Malfunction of the ETACS-ECU
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ). NO: Go to Step 2.
  2. STEP 2. Using scan tool MB991958, check data list. Using the ETACS-ECU service data, check the signals related to the illumination of turn-signal light. Turn the ignition switch to the "ON" position. TURN-SIGNAL LIGHT CONDITION Item No. Item name Normal conditions Item 254 IG voltage Battery positive voltage Q: Does scan tool MB991958 display the item "IG voltage" as normal condition? YES: Go to Step 3. NO: Troubleshoot the ETACS-ECU. Refer to «INSPECTION PROCEDURE 2 "THE IGNITION SWITCH (IG1) SIGNAL IS NOT RECEIVED"»(ref-592558-S20121232692014011000000) .
  3. STEP 3. Retest the system. Check that turn-signal lights illuminate. Q: Do turn-signal lights work normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.
  1. Malfunction of column switch
  2. Malfunction of the ETACS-ECU
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, Check the configuration function. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Use the ETACS-ECU configuration function to check that the "Comfort flasher" is set to "Enable". Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the "Comfort flasher" set to "Enable"? YES: Go to Step 2. NO: Use the ETACS-ECU customize function to set the "Comfort flasher" to "Enable" (Refer to «CUSTOMIZATION FUNCTION»(ref-592608-S29405535172014011000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ). NO: Go to Step 3.
  3. STEP 3. Check that the turn-signal light operates. Check that the turn-signal light work normally when the ignition switch is in the "ON" position. Q: Do turn-signal lights work normally? YES: Go to Step 4. NO: Refer to «INSPECTION PROCEDURE 11 "NONE OF TURN-SIGNAL LIGHTS ILLUMINATES"»(ref-592608-S30799424472014011000000) .
  4. STEP 4. Retest the system Check that the comfort flashing function works normally. Q: Does comfort flashing function works normally? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Inspection Procedure 13: The Turn-Signal Indicator Lights Do Not Illuminate

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of the ETACS-ECU
  2. Malfunction of combination meter
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Check turn-signal light. Check that the turn-signal light flashes normally when the turn-signal switch is operated. Q: Do Turn-signal light work normally? YES: Go to Step 2. NO: Refer to «INSPECTION PROCEDURE 11 "NONE OF TURN-SIGNAL LIGHTS ILLUMINATES"»(ref-592608-S30799424472014011000000) .
  2. STEP 2. Using scan tool MB991958, diagnose the CAN bus line. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 3. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592553-S00268715102014011000000) ).
  3. STEP 3. Using scan tool MB991958, read the diagnostic trouble code. Check if diagnostic trouble code is set to the ETACS-ECU. Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) . NO: Go to Step 4.
  4. STEP 4. Using scan tool MB991958, check actuator test. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Set scan tool MB991958 to the actuator test mode. Item 7: Indicator 1 Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result normal? YES: Replace the ETACS-ECU. NO: Replace the combination meter.

Inspection Procedure 14: The Welcome Light Function Does Not Work Normally

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of the keyless entry system
  2. Malfunction of the ETACS-ECU

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Scheme 43

Scheme 43
Scheme 43
  1. STEP 1. Using scan tool MB991958, Check the configuration function. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check that any one of the followings other than "Disabled" is set for "Welcome light" with a customization function. Small light Head light Turn the ignition switch to the "LOCK" (OFF) position. Q: Is it set to other than "Disabled"? YES: Go to Step 2. NO: Set "Welcome light" to any one other than "Disabled" with a customization function (Refer to «CUSTOMIZATION FUNCTION»(ref-592608-S29405535172014011000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ) NO: Go to Step 3.
  3. STEP 3. Check the keyless entry system operation Check that the keyless entry system operation normally. Q: Is the check result normal? YES: Go to Step 4. NO: Troubleshoot the keyless entry system. Refer to «ACTUATOR TEST TABLE»(ref-592552-S24391294582014011000000) < KOS > or Troubleshooting «TROUBLE SYMPTOM CHART»(ref-592550-S40166312252014011000000) < WCM >.
  4. STEP 4. Check the tail lights and headlights. When the lighting switch is operated, check that the tail lights and headlights illuminate/go off normally. Q: Is the check result normal? YES: Go to Step 5. NO: Troubleshoot the tail lights and headlights. Refer to «TROUBLE SYMPTOM CHART»(ref-592608-S07559379362014011000000) .
  5. STEP 5. Retest the system. Check that the welcome light function works normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

Inspection Procedure 15: The Coming Home Light Function Does Not Work Normally

CAUTIONWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. Malfunction of the keyless entry system
  2. Malfunction of the ETACS-ECU

Required Special Tools

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
  1. STEP 1. Using scan tool MB991958, Check the configuration function. 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. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(ref-592608-S09824045912014011000000) ." Turn the ignition switch to the "ON" position. Check that any one of the followings other than "Disabled" is set for "Coming home light" with a customization function. 15 sec 30 sec 60 sec 180 sec Turn the ignition switch to the "LOCK" (OFF) position. Q: Is it set to other than "Disabled"? YES: Go to Step 2. NO: Set "Coming home light" to any one other than "Disabled" with a customization function (Refer to «CUSTOMIZATION FUNCTION»(ref-592608-S29405535172014011000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code Turn the ignition switch to the "ON" position. Check whether the ETACS-ECU DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592558-S22710001632014011000000) ) NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, check data list Use the ETACS-ECU data list to check the signals related to the front dome light. Turn the ignition switch to the LOCK (OFF) position. FRONT DOME LIGHT CONDITION Item No. Item name Normal condition Item 254 IG voltage 1 V or less OK: Normal condition is displayed. Q: Is the check result normal? YES: Go to Step 4. NO: Troubleshoot the ETACS-ECU. Refer to «INSPECTION PROCEDURE 2 "THE IGNITION SWITCH (IG1) SIGNAL IS NOT RECEIVED"»(ref-592558-S20121232692014011000000) ; .
  4. STEP 4. Check the headlights. When the lighting switch is operated, check that the headlights illuminate/go off normally. Q: Is the check result normal? YES: Go to Step 5. NO: Troubleshoot the headlights. Refer to «TROUBLE SYMPTOM CHART»(ref-592608-S07559379362014011000000) .
  5. STEP 5. Retest the system. Check that the coming home light function works normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592551-S36408212772014011000000) ). NO: Replace the ETACS-ECU.

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