Electronic air suspension-warning lamps

ELECTRONIC AIR SUSPENSION-WARNING LAMPS

Model

Range Rover

Affected vehicles

All Range Rover with electronic Air Suspension.

Date

1994-05-25

Reference

25/05/94

Bulletin text

SUBJECT Electronic Air Suspension (EAS) Valve Block With Seperate Driver Box

MODEL AFFECTED VEHICLES

Range Rover All Range Rover with electronic Air Suspension.

DETAIL

To improve serviceability the EAS valve block has been modified to allow replacement of its two main components. The valve block and driver box are now both serviced individually as spare parts.

Vehicles BEFORE VIN LH 647328: When replacing an old style valve block with the latest part which has a detachable driver box, the extra electrical cable should be tie wrapped to the valve block as shown in the illustration. Position the leads from the driver box to the white connector over the top of the valve block to ensure it does not get trapped under the solenoids. Vehicles AFTER VIN LH 647328: If the new valve block is diagnosed as being faulty the attached flowchart should be used to determine which part of the assembly requires changing

ACTION REQUIRED

Fix on customer complaint.

PARTS INFORMATION

ANR 3282 Valve block replaces NTC 9811.

ANR 3147 New valve block assembly. ANR 3157 New driver box

PROCEDURE

Refer to section 68 of the workshop manual for removal instructions.

25/05/94

60/10/94/EN

WARRANTY

Normal warranty policy and prcedures apply.

COMP. CODE

5Y4

SRO

60.50.42 Diagnostic check - 00.50 hour 60.50.11 Valve block - replace 00.95 hour

60/10/94

SUSPECTED FAULTY VALVE BLOCK

Connect Testbook or HHT

Y Use dynamic test to Compressor failure Air supply leak Exhaust ensure compressor valve stuck open Inlet valve stuck shut Pressure runs when display is on

N Y Clear faults Compressor ok Air leak

Y N

Perform valve test Diagnose Replace (F1 Initial test) source and cure

Start engine and measure voltage between terminal 10 Greater than and 12 (Black and grey/red 12 volts on chassis harness to valve Y block connector) N

Check chassis harness and connectors for cause of voltage drop

N Remove valve Is driver box block detachable

Y

Seperate, valve block 13 way and 2 way connector

Y Replace valve Is valve 7 short circuit 0 to block

Y Are valves 1-6 short Replace valve circuit? 0 to 3 ohms block and driver

N Has a fault been set

Y

N Investigate displayed fault switch stuck code

Y Does vehicle fail Y OK other initial tests

N

N Disconnect valve block from chassis Check for electrical harness possible frozen (13 way connector exhaust valve on floor of box) refer to bulletin 60/09/94

FIX Fix fault displayed

Fit new valve block and driver

Measure resistance of each solenoid

N Are there any open circuits

30 ohms Y

Replace valve N block

N Replace driver box