Mitsubishi Outlander GS45X. Manual — part 1333

DIAGNOSIS

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ELECTRONIC CONTROL AWD

27C-55

DTC C211F: Abnormal power supply voltage (Too high)

ETACS-ECU

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1
RELAY

AWD-ECU

ACA02791

DIAGNOSIS

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ELECTRONIC CONTROL AWD

27C-56

CAUTION

If there is any problem in the CAN bus lines, an
incorrect DTC may be set. Prior to this diagnosis,
always diagnose the CAN bus lines.

.

OPERATION

AWD-ECU detects a power supply voltage abnormal-
ity, and if any abnormality occurs, it interrupts the
system.

.

DTC SET CONDITIONS

If the following conditions are met when the system
is activated, AWD-ECU gradually switches the con-
trol from AWD to FWD, flashes the AWD/LOCK indi-
cators alternately, and sets the DTC C211F.

• Power supply voltage: 17 V or more

• Battery power supply voltage is less than 16 V

.

TROUBLESHOOTING HINTS

Current trouble

• Damaged wiring harness and connectors

• Short to power supply between the battery and

AWD-ECU

• Malfunction of generator or other power supply

systems

Past trouble

• Intermittent wiring harness or connector failure

NOTE: For diagnosis procedures, refer to "How
to treat past trouble" (Refer to GROUP 00

−

How

to Use Troubleshooting/How to Treat Past Trou-
ble

P.00-17

).

• Malfunction of generator or other power supply

systems

DIAGNOSIS

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

• MB991824: Vehicle Communication Interface

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

STEP 1. Generator output current check
Check if the generator is correctly operated (Refer to GROUP
16

− On-vehicle Service/Output Current Test

P.16-8

).

Q: Is the check result normal?

YES : Go to Step 2.
NO : Replace the generator.

STEP 2. Scan tool MB991958 CAN bus diagnostics
Use scan tool MB991958 to diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair the CAN bus line (Refer to GROUP 54C

−

Troubleshooting/CAN Bus Diagnostics Table

P.54C-17

). On completion, go to Step 3.

AC901227AB

C-128

C-31

C-138

Connectors: C-31, C-128, C-138

AC901228AB

C-315

C-309
(B)

ETACS-ECU
(front view)

Connectors: C309, C-315

DIAGNOSIS

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ELECTRONIC CONTROL AWD

27C-57

STEP 3. Check whether the DTC is reset after repairing the
CAN bus line.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(3) Check if the DTC is set.
Q: Is the DTC C211F set?

YES : Go to Step 4.
NO : The procedure is complete.

STEP 4. Check the following connector:
Check the connectors below for improper engagement, termi-
nal damage or terminal drawn in the connector case.

• C-128 AWD-ECU connector

• C-309, C-315 ETACS-ECU connector

• C-138 intermediate connector

• C-31 intermediate connector

Q: Are the connectors and terminals in good condition?

YES : Go to Step 5.
NO : Repair the connector(s) or terminal(s). Then go to

Step 9.

STEP 5. Voltage measurement at the AWD-ECU connector
(1) Disconnect the C-128 AWD-ECU connector.
(2) Measure the voltage between the C-128 wiring harness

side connector terminals No.3, No.4 (Ignition switch "ON")
and body ground.

OK: System voltage

Q: Is the check result normal?

YES : Go to Step 6.
NO : Check if the generator is correctly operated (Refer to

GROUP 16

− On-vehicle Service/Output Current Test

P.16-9

), and then go to Step 7.

STEP 6. Wiring harness check
Check the wiring harness between the C-128 AWD-ECU con-
nector (terminal No.10) and the body ground for damage or
other problem.
Q: Is the wiring harness in good condition?

YES : Go to Step 8.
NO : Repair the wiring harness. Then go to Step 9.

DIAGNOSIS

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ELECTRONIC CONTROL AWD

27C-58

STEP 7. Wiring harness check
Check the wiring harness between the C-128 AWD-ECU con-
nector (terminal No.3) and the C-315 ETACS-ECU connector
(terminal No.4), and the wiring harness between the C-128
AWD-ECU connector (terminal No.4) and the C-313
ETACS-ECU connector (terminal No.2) for damage or other
problem.
Q: Is the wiring harness in good condition?

YES : Go to Step 8.
NO : Repair the wiring harness. Then go to Step 9.

STEP 8. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(3) Check if the DTC is set.
Q: Is the DTC C211F set?

YES : Replace AWD-ECU (Refer to

P.27C-95

). Then go to

Step 9 .

NO : The trouble can be an intermittent malfunction (Refer

to GROUP 00

− How to Use Troubleshooting/How to

Cope with Intermittent Malfunctions

P.00-15

).

STEP 9. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(3) Check if the DTC is set.
Q: Is the DTC C211F set?

YES : Diagnose again from Step 1.
NO : The procedure is complete.