2
Diagnostics, Troubleshooting and Testing
17
WABCO
Maintenance Manual MM-1306 (Revised 08-18)
1590
19
Incorrect J1939 ACC Mode data in
ACC1 message received from engine.
This code may indicate the engine has
recognized a radar malfunction (e.g.
blocked radar) and has disabled Cruise
Control.
This code may also indicate the engine
is not configured for operation with an
Adaptive Cruise Control system.
앫
Check for multiple active DTCs in the radar.
앫
If there is more than one active code, repair all other codes, then
cycle the ignition to clear the error recognition in the engine.
앫
If this is the only active DTC, verify the engine ECM has the
Adaptive Cruise Control parameter enabled.
1633
19
Incorrect J1939 Cruise Control Pause
Switch data received in CCVS1
message (from engine ECM, body, cab
or chassis controller)
앫
Verify operation of the Cruise Control Pause Switch and the ECU
broadcasting this information on the J1939 network (engine ECM,
body, cab or chassis controller) is functional.
앫
Verify the correct radar part number is installed on the vehicle.
2919
9
J1939 Electronic Brake Controller 5
(EBC5) message from ABS not received
or intermittent
앫
Verify the ABS ECU is connected to the J1939 network and is
functional.
앫
Verify the correct radar part number is installed on the vehicle.
앫
Verify correct ABS part number is used.
앫
Cycle ignition to clear DTCs after ABS servicing.
5023
9
J1939 Adaptive Cruise Control 2
(ACC2) message from the display (or
instrument cluster) not received or
intermittent
앫
Intermittent power or J1939 network connection to display or
instrument cluster.
앫
Verify harness is correct.
앫
Verify correct software version in display or instrument cluster.
5606
9
J1939 Cruise Control/Vehicle Speed 3
(CCVS3) message (usually from the
engine) not received or intermittent
앫
Verify the correct radar part number is installed on the vehicle.
앫
Cycle the ignition to clear DTCs after engine servicing.
앫
Verify the engine ECM has the Adaptive Cruise Control parameter
enabled.
5606
19
Incorrect J1939 Adaptive Cruise
Control Readiness Status data received
in CCVS3 message from engine.
This code may indicate the engine has
recognized a radar malfunction (e.g.
blocked radar) and has disabled Cruise
Control.
This code may also indicate the engine
is not configured for operation with an
Adaptive Cruise Control system.
앫
Verify the fault is active at all times by cycling the key off for 2 to 3
minutes and powering it back up to see if the fault code is still
active.
앫
Verify there are no faults in any system on the vehicle and repair all
other faults before diagnosing the system.
앫
Check for multiple active DTCs in the radar.
앫
If there is more than one active code, repair all other codes, then
cycle the ignition to clear the error recognition in the engine.
앫
If this is the only active DTC, instruct the dealer to verify with the
engine manufacturer that the engine parameters are set correctly.
앫
Check any optional components that are connected to the J1939
network that may cause a message issue.
SPN
FMI
Cause/Description
Action/Repair Instructions
