Mitsubishi Lancer Evolution X. Manual - part 2
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-33
DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU.
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, a component con-
nected to the CAN bus line may be broken.
.
FUNCTION
When the CAN bus diagnosis is carried out, the scan
tool sets communication "OK" flags in the patch
between the ETACS-ECU and active other ECUs. If
a commutation "OK" flag is not set for the ECUs
other than the ETACS-ECU, this diagnosis result will
be set.
.
TROUBLE JUDGEMENT CONDITIONS
If no communication flags are set for the ECUs (on
the CAN-B or CAN-C lines) other than the
ETACS-ECU, the ETACS-ECU determines that there
is a failure.
.
TROUBLESHOOTING HINT
Malfunction of the ETACS-ECU
DIAGNOSIS
Required Special Tools:
• 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
Recheck for other system diagnostic trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
Check whether ETACS-ECU-related DTC is set.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES (The DTC other than the U code is set.) :
Troubleshoot the ETACS-ECU. Refer to GROUP 54A,
ETACS-ECU
YES (Only U-code DTC is set.) : Check the power supply
circuit of the ETACS-ECU. Refer to GROUP 54A,
ETACS-ECU
NO (The DTC is not set.) : Check the power supply circuit
of the ETACS-ECU. Refer to GROUP 54A,
ETACS-ECU
AC608435
Data link connector
MB991827
MB991824
MB991910
AB