Service bulletin SGI14-21

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10101647
Published by NHTSA	2017-06-01
Manufacturer's number	SGI14-21
Manufacturer's date	2014-05-30
NHTSA component	SEATS; ELECTRICAL SYSTEM:WIRING

NHTSA's summary

"DESCRIPTION AN ISSUE HAS BEEN IDENTIFIED ON 2014 MODEL YEAR RANGE ROVER (L405) LONG WHEELBASE (LWB) VEHICLES EQUIPPED WITH REAR BUSINESS SEATS. THERE IS A RISK OF WIRING HARNESS CONTACT WITH THE REAR LEFT AND RIGHT BUSINESS SEAT MECHANISM, LEADING TO A POSSIBLE CHAFING CONDITION AT THE BREAKOUT TO THE REAR SEATS AND CAUSING THE SEAT(S) TO NOT FUNCTION PROPERLY."

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Seats, Wiring and fuses

Vehicles listed
LAND ROVER RANGE ROVER	2014

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
SSM73845	2018-07-02. Service bulletin. In the event that a SRS firing circuit is found to be damaged, please refer to SCN JLRP00128 and TOPIx (workshop manual section 418-02 - Description and Operation ? Diagnosis and Testing) for the updated wiring repair standard and guidelines.
SSM71278	2017-06-14. Service bulletin. ISSUE: A CUSTOMER MAY REPORT THE VEHICLE STEERING FEELS HEAVY FOLLOWING AN ECO STOP START EVENT, POTENTIALLY ACCOMPANIED BY VISUAL OR AUDIBLE WARNINGS THROUGH THE INSTRUMENT PACK.
SSM71278	2017-06-13. Service bulletin. VEHICLE STEERING FEELS HEAVIER THAN EXPECTED ACCOMPANIED BY VISUAL OR AUDIIBLE WARNINGS
SSM71278	2017-06-13. Service bulletin. "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 (FOR L405/L494) G1D132 AND OR G4D178, (SEE ATTACHED DIAGRAM). OR IF ON L550/L538 HIGH RESISTANCE AT G1D122A, G1D122B, G1D122AZ AND G1D108. -POOR CONNECTION OR PIN SET CONDITION AT CONNECTOR NUMBER: C11-G1"
SSM71278	2017-06-12. Service bulletin. "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 (FOR L405/L494) G1D132 AND OR G4D178, (SEE ATTACHED DIAGRAM). OR IF ON L550/L538 HIGH RESISTANCE AT G1D122A, G1D122B, G1D122AZ AND G1D108."
LTB00626NAS2	2017-06-07. Service bulletin. "SITUATION: ONE OR MORE OF THE FOLLOWING ISSUES MAY BE EVIDENT: • THE ALARM IS TRIGGERED FOR NO APPARENT REASON; • THE 'HOOD OPEN' MESSAGE IS DISPLAYED ON THE INSTRUMENT CLUSTER; AND/OR • A MISLOCK SOUND IS EMITTED WHEN LOCKING THE VEHICLE. CAUSE: THESE ISSUES MAY BE CAUSED BY A FAULTY HOOD OPEN SWITCH."
SSM72100	2017-06-05. Service bulletin. "ISSUE: A POTENTIAL CONCERN HAS BEEN IDENTIFIED WITH THE ACCELERATOR PEDAL ON A SMALL NUMBER OF RANGE ROVER AND RANGE ROVER SPORT VEHICLES WHICH MAY RESULT IN THE VEHICLE ENTERING RESTRICTED PERFORMANCE MODE. CAUSE: THE ACCELERATOR PEDAL SWITCH PRINTED CIRCUIT BOARD MAY NOT HAVE BEEN CORRECTLY SOLDERED LEADING TO AN INTERMITTENT CONNECTION."
LTB00660NAS2	2017-06-01. Service bulletin. "SITUATION: THE FRONT AND/OR REAR PARKING AID SYSTEM MAY BE INOPERATIVE. CAUSE: THIS MAY BE CAUSED BY A CORRODED WIRING HARNESS AT THE FRONT AND/OR REAR BUMPER HARNESSES."
Q394 UPS3714-2BN	2017-06-01. Service bulletin. "SITUATION: AN ISSUE HAS BEEN IDENTIFIED ON 2014 MODEL YEAR RANGE ROVER (L405) LONG WHEELBASE (LWB) VEHICLES EQUIPPED WITH REAR BUSINESS SEATS. THERE IS A RISK OF WIRING HARNESS CONTACT WITH THE REAR LEFT AND RIGHT BUSINESS SEAT MECHANISM, LEADING TO A POSSIBLE CHAFING CONDITION AT THE BREAKOUT TO THE REAR SEATS AND CAUSING THE SEAT(S) TO NOT FUNCTION PROPERLY. ACTION: RETAILERS ARE REQUIRED TO HOLD ALL AFFECTED VEHICLES WITHIN THE LISTED VIN RANGE THAT ARE IN THEIR CONTROL AND REFRAIN FROM RELEASING THE VEHICLES FOR NEW OR USED VEHICLE SALE PENDING COMPLETION OF THE REWORK ACTION DETAILED IN THIS TECHNICAL BULLETIN."
SSM71278	2017-05-31. Service bulletin. "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)."