Mitsubishi L200. Manual — part 800

LIGHTING
CONTROL
SENSOR

ETACS-ECU

LIN
INTERFACE

Lighting Control Sensor LIN Communication Circuit

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

FUSE

13

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-11

TROUBLE JUDGEMENT
The ETACS-ECU receives signal from the lighting
control sensor. If signal cannot be received at all,
diagnosis code No.U1504 will be set.

COMMENT ON TROUBLE SYMPTOM

The M.U.T.-III shows a diagnosis code status as

active.

• Connector(s) or wiring harness in the LIN bus

lines between the lighting control sensor and the
ETACS-ECU, the power supply system of the
lighting control sensor, or the lighting control sen-
sor itself may be defective.

The M.U.T.-III shows a diagnosis code status as

stored.

• If diagnosis code No.U1504 is stored as a past

trouble, carry out diagnosis with particular
emphasis on wiring and connector(s) in the LIN
bus line between the lighting control sensor and
the ETACS-ECU, and the power supply system of
the lighting control sensor. For diagnosis proce-
dures, refer to GROUP 00, How to Use Trouble-
shooting/Inspection Service Points

− How to

Treat Past Trouble .

PROBABLE CAUSES

• Malfunction of the lighting control sensor

• Damaged harness wires and connectors

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-12

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-206 junction block
connector, C-219 ETACS-ECU connector, D-38
lighting control sensor connector

AC509935AU

Connectors: C-206, C-219 <LHD>

C-219

C-206

Harness side

C-206

C-219

Harness side

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector. Go to Step
7.

STEP 2. Resistance measurement at the D-38
lighting control sensor connector

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

(1) Disconnect the connector, and measure at the

wiring harness side.

AC310506LG

Connector D-38
(Harness side)

(2) Measure the resistance between the D-38

lighting control sensor connector terminal No. 2
and the body earth.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Go to Step 3.

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-13

STEP 3. Check the wiring harness between D-38
lighting control sensor connector terminal No. 2
to body earth

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.

STEP 4. Voltage measurement at the D-38
lighting control sensor connector.

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

(1) Disconnect the connector, and measure at the

wiring harness side.

AC310507MM

Connector D-38
(Harness side)

(2) Measure the voltage between the D-38 lighting

control sensor connector terminal No. 1 and the
body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 5.

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-14

STEP 5. Check the wiring harness between C-206
junction block connector terminal No. 3 and D-38
lighting control sensor connector terminal No. 1

AC509934

Connector: C-206 <LHD>

Junction block (Front view)

CW

Harness side

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

Check the power supply line for open circuit and
short circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.