Subsection XX (DIAGNOSTIC AND FAULT CODES)
PCODE
MODULE
DESCRIPTION
CAUSE
ACTION
U0155
ECM
Lost
communication
with CLUSTER
(lost of CAN ID’s)
Missing CAN ID
Module internal error
Damaged circuit wires or
damaged module pins.
Check for Cluster fault or ECM fault
Measure voltage between harness
connector CL-17 and ground.
(Expected value = 11 to 13 volts)
Disconnect MPI2 from DB connector.
Measure resistance between
DB-1 and DB-2 (Expected
value = 50 to 70 ohms).
Measure resistance between
DB-1 and ECMB-C1
(Expected value < 2 ohms).
Measure resistance between
DB-2 and ECMB-C2
(Expected value < 2 ohms).
Measure resistance between DB-1
and CL-19 (Expected value < 2 ohms).
Measure resistance between DB-2
and CL-18 (Expected value < 2
ohms).
U0155
SCM-XMR
Communication
network
disconnected
Lost of CAN
communication
1- Verify if all the module
are present in BUDS (under
Module Menu), if they are the
vehicle is working properly.
2- Check continuity between the
cluster, ECM and SCM CAN network.
U0167
ECM
Lost
communication
with Vehicle
Immobilizer
Control Module
The Vehicle Immobilizer is
reporting an electrical fault
on the communication line.
Check for dirty or oxidized Key
contact. Clean key contact if needed.
Check for broke key contact
Ensure sensor connector
is fully inserted.
Measure resistance between
ECMB-A1 and CC-C
(Expected value < 2 ohms).
Measure resistance between
ECMB-C2 and CC-E (Expected value
< 2 ohms).
U0167
ECM
Lost
communication
with Vehicle
Immobilizer
Control Module
The Vehicle Immobilizer is
reporting an electrical fault
on the communication line.
Check for dirty or oxidized Key
contact. Clean key contact if needed.
Check for broke key contact
Ensure sensor connector
is fully inserted.
Measure resistance between
ECMB-A1 and CC-C
(Expected value < 2 ohms).
Measure resistance between
ECMB-C2 and CC-E (Expected value
< 2 ohms).
U0300
ECM
Invalid Security
Exchange
received
Incorrect ECM
or CLUSTER,
Incorrect software version.
Install the proper ECM
or CLUSTER on vehicle.
Update security coding using
BUDS
U0400
DPS
Variant Coding
failure Software
incompatibility
Faulty variant coding
Faulty programming
Check in the BUDS Tab
"vehicle configuration" if
the DPS option is checked.
Reflash the DPS with the latest
software
vmr2015
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