Mitsubishi Outlander XL. Manual — part 1008
DTC B16A8: Taillight (LH) circuit short
M15410900093USA0000010000
Taillight (LH) Circuit
REAR
COMBINATION
LIGHT (LH)
ETACS-ECU
TAILLIGHT
CONTROL CIRCUIT
ZC6008780025
Connector: C-311
LIGHTING
54Ac-105
DIAGNOSIS
ZC6008800019
Connector: D-14
D-14
TROUBLE JUDGMENT
When an open circuit is detected in the taillight circuit,
the ETACS-ECU sets DTC B16A1. If a short circuit is
detected, DTC B16A8 is set.
TECHNICAL DESCRIPTION (COMMENT)
The problem detection of taillight is made based on
the digital feed back signal (input signal to ETACS-
ECU) which operates the taillight. When the ignition
switch is "ON", the ETACS-ECU determines the
taillight circuit state from the load placed on the line.
After 100 ms has elapsed since the start of the check,
the ETACS-ECU performs a sampling with each 10
ms. If an abnormality is detected, it increases the
counter by 2, and when no abnormality is detected, it
decreases the counter by 1. Once the counter
reaches "10", the ETACS-ECU sets the DTC B16A1
if the load is detected on the line, and sets the DTC
B16A8 if no load is detected.
TROUBLESHOOTING HINTS
⦆
The wiring harness or connectors may have loose,
corroded, or damaged terminals, or terminals
pushed back in the connector
⦆
Malfunction of the ETACS-ECU
DIAGNOSIS
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 rear combination light (LH) connector D-14
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q:Is combination light (RH) connector D-14 in good
condition?
YES:
Go to Step 2.
NO:
Repair the damaged parts.
STEP 2. Resistance measurement at rear combination light
(LH) connector D-14.
(1)
Disconnect the connector, and measure at the wiring harness
side.
54Ac-106
LIGHTING
DIAGNOSIS
ZC5015310005
Connector D-14
(Harness side)
(2)
Measure the resistance between the rear combination light
(LH) connector D-14 (terminal No. 4) and the body ground.
The measured value should be continuity exists (2
Ω or less).
Q:Does the measured resistance value correspond with this
range?
YES:
Go to Step 4.
NO:
Go to Step 3.
STEP 3. Check the wiring harness between rear
combination light (LH) connector D-14 (terminal No. 4) and
ground.
Q:Is the check result normal?
YES:
Go to Step 6.
NO:
Repair the wiring harness.
STEP 4. Check ETACS-ECU connectors C-311 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q:Is ETACS-ECU connectors C-311 in good condition?
YES:
Go to Step 5.
NO:
Repair the damaged parts.
STEP 5. Check the wiring harness between rear
combination light (LH) D-14 connector (terminal No. 2) and
ETACS-ECU connector C-311 (terminal No. 10).
Q:Is the wiring harness between rear combination light (LH)
D-14 connector (terminal No. 2) and ETACS-ECU
connector C-311 (terminal No. 10) in good condition?
YES:
Go to Step 6.
NO:
Repair the wiring harness.
LIGHTING
54Ac-107
DIAGNOSIS
STEP 6. Using scan tool MB991958, Check whether the
diagnostic trouble code is reset.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
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 P.54Ac-99."
(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?
YES:
Replace the ETACS-ECU.
NO:
The procedure is complete.
TROUBLE SYMPTOM CHART
M15410900009USA0000010002
Trouble symptom
Inspection
Procedure No.
Reference page
The taillights do not illuminate.
1
Any of the taillights does not illuminate.
2
SYMPTOM PROCEDURES
Inspection Procedure 1: The taillights do not illuminate.
M15410900112USA0000010000
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the
communication circuit are normal.
TECHNICAL DESCRIPTION (COMMENT)
If all the taillights do not illuminate normally, the
taillight switch input circuit or ETACS-ECU may have
a problem.
TROUBLESHOOTING HINTS
⦆
Malfunction of column switch
⦆
Malfunction of the ETACS-ECU
⦆
The wiring harness or connectors may have loose,
corroded, or damaged terminals, or terminals
pushed back in the connector
54Ac-108
LIGHTING
DIAGNOSIS
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