Service bulletin LTB00791NAS1

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	10105733
Published by NHTSA	2017-06-08
Manufacturer's number	LTB00791NAS1
Manufacturer's date	2015-09-28
NHTSA component	ELECTRICAL SYSTEM; SUSPENSION; ELECTRICAL SYSTEM:WIRING

NHTSA's summary

"SITUATION: THE ADAPTIVE DAMPING (AD) WARNING LIGHT MAY BE DISPLAYED ON THE INSTRUMENT CLUSTER (IC). UPON DIAGNOSIS, A TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES (DTC ) PRESENT IN THE INTEGRATED SUSPENSION CONTROL MODULE (ISC M) OR SUSPENSION CONTROL MODULE (SUM). CAUSE: THIS MAY BE CAUSED BY DAMAGE TO THE ADAPTIVE DAMPER ELECTRICAL WIRING HARNESS."

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, Suspension, Wiring and fuses

Vehicles listed
LAND ROVER RANGE ROVER EVOQUE	2012, 2013, 2014, 2015, 2016

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."
SSM72448	2017-06-09. Service bulletin. "ISSUE: THE CUSTOMER MAY OBSERVE A MIL IN THE INSTRUMENT CLUSTER RELATING TO THE ENGINE SYSTEM (CHECK ENGINE LIGHT) AND ONE OR MORE CODES STORED IN THE PCM RELATING TO HEATED OXYGEN SENSOR (HO2S) IN THE EXHAUST SYSTEM. THE CODE WILL REFER TO A FAULT WITH THE PRE, OR MID, OR POST CATALYST HEATED OXYGEN SENSOR: P0030, P0031, P00D1, P0130, P0131, P0132, P0133, P0134, P0135, P014C, P2195, P2196, P2231, P2237, P2243, P2245, P2251, P2297, P2626, P2A00, P0050, P0051, P00D3, P0150, P0151, P0152, P0153, P0154, P0155, P2197, P2198, P2234, P2240, P2247, P2254, P0037, P0038, P0054, P0136, P0137, P0138, P0139, P013A, P013E, P0140, P0141, P2270, P2271, P0056, P0057, P0060, P013C, P014A, P0156, P0157, P0158, P0159, P0160, P0161, P2272, P2273, P0042, P0043, P0044, P0055, P0142, P0143, P0144, P0147, P2274, P2275, P0061, P0062, P0063, P0162, P0163, P0164, P0167, P2276, P2277 UPON DIAGNOSIS NO FAULT IS FOUND WITH THE WIRING HARNESS OR CONNECTOR AND THE FAULT IS DETERMINED TO BE WITH THE SENSOR (HAVING FOLLOWED THE DIAGNOSTIC INFORMATION AND HELP TEXT RELATING TO PCM CODES AS READ BY SDD). CAUSE: THE ROOT CAUSE HAS YET TO BE IDENTIFIED AND IS CURRENTLY UNDER INVESTIGATION."
LTB00841NAS3	2017-06-08. Service bulletin. SITUATION: ON VEHICLES FITTED WITH HALOGEN HEADLAMPS, THE HB3 HALOGEN BULBS MAY HAVE BLOWN AT LOW TIME IN SERVICE.
LTB00740NAS2	2017-06-08. Service bulletin. "SITUATION: A 'GEARBOX FAULT' MESSAGE MAY BE DISPLAYED ON THE INSTRUMENT CLUSTER ALONG WITH ONE OR MORE OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES (DTC) STORED IN THE TRANSMISSION CONTROL MODULE (TCM): P0600-04, P0710-27, P0710-64, P0712-11, P0713-13, P0975-19, P0978-19, P0981-19, AND P0984-19. CAUSE: THIS MAY BE CAUSED BY A FAULTY CRIMP ON THE TRANSMISSION INTERNAL WIRING HARNESS."
LTB00740NAS1	2017-06-07. Service bulletin. "SITUATION: A 'GEARBOX FAULT' MESSAGE MAY BE DISPLAYED ON THE INSTRUMENT CLUSTER ALONG WITH ONE OR MORE OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES (DTC) STORED IN THE TRANSMISSION CONTROL MODULE (TCM): P0600-04, P0710-27, P0710-64, P0712-11, P0713-13, P0975-19, P0978-19, P0981-19, AND P0984-19. CAUSE: THIS MAY BE CAUSED BY A FAULTY CRIMP ON THE TRANSMISSION INTERNAL WIRING HARNESS."
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."