Engine regulator setting
Check the switch module, including wiring and connectors.Measure the voltage (or the resistance) between coordinator pins 29 and 48. The values must not deviate significantly from those indicated below: Governor setting STIFF: 0.7-0.9 V (60 ohms)SOFT: 2.5-2.7 V (333 ohms)NORMAL: 3.3-3.5 V (665 ohms)DEFAULT: 4.5 V or higher Check also whether the engine control unit has generated any fault codes.If this is shown to be an internal fault in the coordinator, the coordinator must be renewed.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The voltage in the regulator setting switch module circuit has been either higher or lower than permitted.For each function in the switch module (STIFF, SOFT, NORMAL and DEFAULT) a unique voltage value is sent to the coordinator during activation. The fault code is generated if the voltage between coordinator pins 29 and 48 has been implausible in relation to the activated function.
Short circuit or open circuit in the regulator setting switch module circuit. There may also be an internal fault in the switch module or in exceptional cases in the coordinator.