Description - SLS (REAR SUSPENSION) (page 8 of 9)

REAR SUSPENSION

DESCRIPTION AND OPERATION

64-19

Failure modes
Failures are indicated by the SLS warning lamp in the bottom left corner of the instrument pack illuminating 
continuously in an amber colour. The following tables show the type of system failures and their effects on the system 
operation.

Height sensors

Door Switch Inputs

Connector/Pin 

No.

Description

Input/Output

C0504

1

Battery supply

Input

2

Ignition supply

Input

5

K line (diagnostics)

Input/Output

12

Earth

Input

C0654

1

Left height sensor supply

Output

2

Left height sensor earth

Input

3

Left height sensor signal

Input

4

Right height sensor supply

Output

5

Right height sensor earth

Input

6

Right height sensor signal

Input

C0655

1

Driver's door switch

Input

2

Passenger and tail door switches

Input

3

Left air valve

Output

4

Right air valve

Output

5

Exhaust valve

Output

6

Air compressor (SLS relay)

Output

7

Audible warning

Output

8

SLS warning lamp

Output

11

ORM switch/ORM warning lamp

Input/Output

12

Remote handset raise/lower signal

Input

Connectors and pins not listed are either not used or used by the brakes system. 
 

 + 

 BRAKES, DESCRIPTION AND OPERATION, Description.

Failure

Effect

Sensor output stuck at 5 V

Vehicle will not level

Sensor output stuck at 0 V

Vehicle will not level

Mechanical link between radius arm and sensor 
broken

Vehicle will not level

Failure

Effect

Harness leads for open doors are are broken or 
shorted to V Batt.

Air suspension levels when one or more doors 
are open

Harness leads to door(s) shorted to earth

Air suspension will not level