NHTSA ID Number: 10101263
Manufacturer Communication Number: SSM71278
TSB/Document Date: 2017-05-31
Summary
"ISSUE: A CUSTOMER MAY REPORT THE VEHICLE STEERING FEELS HEAVY POTENTIALLY ACCOMPANIED BY VISUAL OR AUDIBLE WARNINGS THROUGH THE INSTRUMENT PACK. THE FOLLOWING DTCS MAY ALSO BE LOGGED: EPAS DTCS LOGGED: -B1304-16: ELECTRONIC POWER ASSISTED STEERING (EPAS) SYSTEM CIRCUIT VOLTAGE BELOW THRESHOLD -U3001-00: POWER STEERING CONTROL MODULE (PSCM) SYSTEM IMPROPER SHUTDOWN. THESE MAY BE ACCOMPANIED BY: -U0001-87 / 88 HIGH SPEED CAN BUS INVALID SERIAL DATA RECEIVED / MISSING MESSAGE. CHCM DTCS LOGGED: -U0131-00 CHASSIS CONTROL MODULE (CHCM) LOST COMMS WITH PSCM. -U3003-62 BATTERY VOLTAGE SIGNAL COMPARE FAILURE. -U0420-68 CHCM INVALID DATA RECEIVED FROM PSCM. CAUSE: THIS MAY BE CAUSED BY: -LOW BATTERY VOLTAGE. -WIRING HARNESS ISSUE (SHORT / OPEN CIRCUIT, HIGH RESISTANCE). -HIGH RESISTANCE AT EPAS EARTH TERMINAL G1D132 AND OR G4D178, (SEE ATTACHED DIAGRAM)."
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TSB/Document ID: SSM71278
Replacement Service Bulletin Number:
MFR Communication Date: 2014-02-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
MFR Component System:
MFR Component Subsystem:
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TOPix - SSM71278 - Vehicle Steering Feels Heavy
Page 1 of 1
1Ground Points.pdf
I
Reference SSM71278
M d
0
Range Rover Sport / L494
I
e s Range Rover (All New) / L405
Title
Category
Last modified
Symptom
Vehicle Steering Feels Heavy
Chassis
06-Feb-2014 00:00:00
303000 Steering/Handling
Issue:
A customer may report the vehicle steering feels heavy
potentially accompanied by visual or audible warnings
through the instrument pack. The following DTCs may
also be logged:
EPAS DTCs logged:
-B1304-16: Electronic Power Assisted Steering (EPAS)
system circuit voltage below threshold
-U3001-00: Power Steering Control Module (PSCM)
system improper shutdown.
These may be accompanied by:
-U0001-87 I 88 High speed CAN bus invalid serial data
received/ missing message.
CHCM DTCs logged:
-U0131-00 CHassis Control Module (CHCM) lost comms
with PSCM.
-U3003-62 Battery voltage signal compare failure.
-U0420-68 CHCM invalid data received from PSCM.
Content Cause:
This may be caused by:
-Low battery voltage.
-Wiring harness issue (short/ open circuit, high
resistance).
-High resistance at EPAS earth terminal G1D132 and or
G4D178, (see attached diagram).
Action:
-Using SOD please check the CHCM and EPAS for any
OTC
-Confirm the vehicle battery condition is OK
-Confirm ignition and main feed fuses are secure.
-Check and clean the earth terminals (G1D132 &
G4D178), replacing the washer if found to be corroded
and re-tighten retaining fixings.
-Refer to the electrical circuit diagrams (211.02 in TOPlx)
and check the power steering control module power feed
circuit for short circuit to ground, open circuit, high
resistance.
http://topix.landrover.jlrint.com/topix/service/archive/45 3 23 7/index
2/20/2014
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