Mitsubishi Evolution X. Manual — part 1127
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-143
.
FUNCTION
If the scan tool MB991958 cannot communicate with
the CAN box unit, this diagnosis result will be set.
.
TROUBLE JUDGEMENT CONDITIONS
If a communication flag is not set for the CAN box
unit, the ETACS-ECU determines that there is a fail-
ure.
.
TROUBLESHOOTING HINTS
• Malfunction of the connector [joint connector
(CAN1), CAN box unit connector improperly con-
nected]
• Malfunction of the wiring harness [open circuit
between the CAN box unit connector and the joint
connector (CAN1), power supply circuit to the
CAN box unit]
• Malfunction of the CAN box unit
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Check joint connector (CAN1) C-105, CAN box unit
connector C-15 and intermediate connector C-108 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
CAUTION
The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to
Q: Are joint connector (CAN1) C-105, CAN box unit
connector C-15 and intermediate connector C-108 in
good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC708951BP
Connectors: C-15, C-108
C-15
C-108
AC708950
Connector: C-105
BL
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-144
STEP 2. Check the wiring harness between joint connector
(CAN1) C-105 and CAN box unit connector C-15 for open
circuit.
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
(1) Disconnect joint connector (CAN1) C-105 and CAN box unit
connector C-15, and check the wiring harness.
(2) Check the wiring harness between joint connector (CAN1)
C-105 (terminal 5) and CAN box unit connector C-15
(terminal 8)
OK: Continuity exists (2
Ω or less)
(3) Check the wiring harness between joint connector (CAN1)
C-105 (terminal 16) and CAN box unit connector C-15
(terminal 9)
OK: Continuity exists (2
Ω or less)
Q: Is the wiring harness between joint connector (CAN1)
C-105 and CAN box unit connector C-15 in good
condition?
YES : Check the power supply circuit of the CAN box unit.
Refer to GROUP 54A, Diagnosis <MMCS>
.
NO : Repair the wiring harness between joint connector
(CAN1) C-105 and CAN box unit connector C-15.
AC709707
AC709707 CH
Harness side: C-105
Harness side: C-15
TEST
HARNESS
TEST HARNESS
AC709707 CI
Harness side: C-105
Harness side: C-15
TEST
HARNESS
TEST
HARNESS
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-145
DIAGNOSTIC ITEM 22: Diagnose when the scan tool cannot receive the data sent by satellite radio
tuner.
CAUTION
When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.
CAN-B Communication Circuit
ETACS-ECU
INTERFACE
CIRCUIT
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
HANDS FREE
MODULE
OCCUPANT
CLASSIFICATION-
ECU
SATELLITE
RADIO
TUNER
RADIO AND CD
PLAYER
NOTE
VEHICLES WITHOUT MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)
VEHICLES WITH MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)
CAN
TRANSCEIVER
CIRCUIT
CAN BOX UNIT
JOINT CONNECTOR
(CAN1)
FRONT SEAT
ASSEMBLY (LH)
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-146
.
FUNCTION
If the scan tool MB991958 cannot communicate with
the satellite radio tuner, this diagnosis result will be
set.
.
TROUBLE JUDGEMENT CONDITIONS
If a communication flag is not set for the satellite
radio tuner, the ETACS-ECU determines that there is
a failure.
.
TROUBLESHOOTING HINTS
• Malfunction of the connector [joint connector
(CAN1), satellite radio tuner connector improp-
erly connected]
• Malfunction of the wiring harness [open circuit
between the satellite radio tuner connector and
the joint connector (CAN1), power supply circuit
to the satellite radio tuner]
• Malfunction of the satellite radio tuner
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Check joint connector (CAN1) C-105 and satellite
radio tuner connector C-18 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
CAUTION
The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to
Q: Are joint connector (CAN1) C-105 and satellite radio
tuner connector C-18 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC708951BX
Connector: C-18
AC708950
Connector: C-105
BL
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