DTC B16A5: Turn-Signal Light (RH) Short Circuit: Diagnosis

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Required Special Tools:

MB992006: Extra fine probe
MB991223: Harness set
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)

STEP 1. Check headlight assembly (RH) connector A-57 <front>, side turn-signal light (RH) connector A-02 <side>, rear combination light (RH) connector F-06 <rear> for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are headlight assembly (RH) connector A-57 <front>, side turn-signal light (RH) connector A-02 <side>, rear combination light (RH) connector F-06 <rear> in good condition?
1. YES: Go to Step 2.
2. NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
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?
1. YES: Go to Step 3.
2. NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
STEP 3. Check the wiring harness between headlight assembly (RH) connector A-57 (terminal 3) <front>, side turn-signal light (RH) connector A-02 (terminal 2) <side>, rear combination light (RH) connector F-06 (terminal 2) <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 .
- Check the communication line for open circuit.
  Q: Are the wiring harness between headlight assembly (RH) connector A-57 (terminal 3) <front>, side turn-signal light (RH) connector A-02 (terminal 2) <side>, rear combination light (RH) connector F-06 (terminal 2) <rear> and ETACS-ECU connector C-304 (terminal 16) <front or side> or C-311 (terminal 19) <rear> in good condition?
  1. YES: Go to Step 4.
  2. 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.
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.
1. Connect scan tool MB991958. Refer to "HOW TO CONNECT SCAN TOOL ."
2. Turn the ignition switch to the "ON" position.
3. Erase the DTC.
4. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
5. Check if DTC is set.
Q: Is the DTC set?
1. YES: Replace the ETACS-ECU.
2. NO: The procedure is complete.
Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.