C1830

C1830; RELAY DRIVE CIRCUIT FAULT

G256924t51: CHECK THE RELAY DRIVE CIRCUIT FOR SHORT TO B+
1. Remove the air suspension relay.
2. Measure the voltage between the relay base, pin 02, and GROUND.
^ Is the voltage greater than 3 volts?
-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.
-> No

G256924t48: CHECK THE RELAY DRIVE CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the relay base, pin 02, and GROUND.
^ Is the resistance less than 10,000 ohms?
-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.
-> No

G256924t52: CHECK THE RELAY DRIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ASU electrical connector, CR91.
3. Measure the resistance between CR91, pin 12 (NR).
^ Is the resistance greater than 5 ohms?
-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.
-> No
INSTALL a new air suspension relay. CLEAR the DTC. TEST the system for normal operation. if the DTC is repeated, contact dealer technical support for confirmation of possible module failure, and/or raise an EPQR.