SSM71278

TOPix - SSM71278 - Vehicle Steering Feels Heavy
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1Ground Points.pdf
I
Reference SSM71278
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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