1534-1535 / 1904
ELECTRICAL
34
Sr
No DTC Code
DTC
Descriptio
n
Minimum Time for
Fault Setting /
Tester Visibility,
Assuming Fault
was created while
Ignition was OFF
Impact on customer Probable cause
Investigation/Rectificati
on/Repair action
2
U0028 88
Vehicle
Communic
ation Bus
A - bus off
Immediate
EPAS lamp ON, CE
Lamp ON, MIL Lamp
ON. Default steering
assistance, EMS will
go into default mode.
Gear cannot be
changed. TCM will go
into default mode.
TCM Lamp ON
1. Short circuit failure
between CAN High and
CAN Low lines.
2. Short circuit failure
between CAN Low and
Battery lines.
3. Short circuit failure
between CAN High and
Ground line
1. Check CAN wiring
harness for short circuit
failure(s).
2. Measure resistance
between CAN High (OBD
Connector) and CAN
Low (OBD Connector)
lines to detect short
circuit failure.
3. Measure resistance
between CAN Low (OBD
Connector) and Battery
lines (OBD Connector) to
detect short circuit
failure.
4. Measure resistance
between CAN High (OBD
Connector) and Ground
lines (OBD Connector) to
detect short circuit
failure.
5. If measured resistance
is in the range of 0 to 10
ohm, then any one of the
short circuit failure is
present.
6. Repair the wiring
harness.