Cold Start - Service Action H855 (H855)

Publication date: 1995-03-17
Reference number: H855

COLD START - SERVICE ACTION H855

SERVICE CAMPAIGN BULLETIN

Reference Number(s): H855, Date of Issue: March 17, 1995

LAND ROVER:	Range Rover, Discovery, Defender
SECTION:	General Info
AFFECTED VEHICLES:	Selected vehicles as defined by Model Year and vehicle location map.

DETAIL

We have developed improved fueling tunes to enhance starting performance in extreme cold. These tunes reduce the amount of fuel injected into the engine at temperatures below -5 °F (-20°C). 1995 MY Range Rover Classics, '94 and '95 MY Discoverys, and '95 MY Defender 90's that are located in the shaded areas on the map included with this bulletin are included in this Service Action.

In addition to the updated tune, engineering have also identified that a high level of cranking speed is critical to starting. As a result an oil change to 5W/30 or 5W/40 engine oil is required (unless the vehicle recently had an oil change at PDI in line with TIB # 12/07/94/US ).

The vehicle owners will be sent an advisory requesting them to make an appointment with their dealer to have the work completed. Refer to Service Bulletin G95-010.

NOTE: Before the action below is carried out ensure that the battery/charging system is in good condition and the vehicles ignition system is functioning correctly.

ACTION REQUIRED

Upon customer complaint, follow the procedure below.

PARTS INFORMATION

PRM 3361A - 4.2 PROM (95 Range Rover)

PRM 3360A - 3.9 PROM (94, 95 Discovery)

PRM 3365A - 3.9 PROM (95 Defender)

5W/30 or 5W/40 - locally sourced to conform to:

CCMC G4 or G5 or API grade SG or SH

PROCEDURE

Upgrade Prom
Remove ECM from the vehicle, and using an appropriate anti static mat and equipment, install new prom. Before installing the new prom, ensure that the semi-circular cut out in the top surface of the prom, is aligned with the similar cut out in the prom socket.

Complete a Service Action Label. Clean an area on the hood locking panel just above the vehicle's emissions label (or another location close to this label). Firmly stick the Service Action label to the panel, and then cover with the clear plastic film as supplied. (see Fig 2 and Fig 3 )

Fig 1: Identifying Match Cut Outs
Oil change
Remove sump plug and allow oil to drain. Refit plug and refill DO NOT REPLACE OIL FILTER.

NOTE: If 5W oil was installed at new vehicle PDI, do not carry out the oil change.

Fig 2: Identifying Label

Place label on vehicle as shown below:

Fig 3: Placing Label On Vehicle

Fig 4: Identifying Map Location

WARRANTY

COMP. CODE:
1. C855

SRO:
1. Prom upgrade:
2. Option 1: 95 Range Rover
3. Option 2: 94, 95 Discovery
4. Option 3: 95 Defender
5. Oil change: claim material only, part # LRNAOIL (as per TIB 12/07/94/US )