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Checking System For Trouble Codes

  1. Using scan tool, read trouble codes and perform appropriate test listed in TROUBLE CODES table. If scan tool displays MAIN RELAY/POWER CIRCUIT FAILURE or VALVE POWER FEED CIRCUIT, go to TEST 14A before proceeding with other tests. If scan tool displays CONTROLLER FAILURE, replace CAB. Perform TEST VER-1A. If scan tool displays NO RESPONSE message, go to TEST 34A. If scan tool screen is blank or no trouble codes are displayed, see scan tool manufacturer's instructions. Also check SYSTEM MALFUNCTION table for problems described by customers, with no trouble codes present, and perform appropriate test.
  2. In some cases, cause of one trouble code may set additional trouble codes. If multiple trouble codes appear on scan tool, trouble code repairs must be performed in order they appear in TROUBLE CODES table. If only one trouble code is set, perform indicated test for that trouble code.
TROUBLE CODES

Trouble Code Perform Test
ABS AMBER WARNING LAMP CIRCUIT FAILURE 2A
DIAGNOSTIC COMPARE (1)
FLUID LEVEL SWITCH OPEN 3A
FLUID LEVEL SWITCH NOT PROCESSABLE 4A
HYDRAULIC FAILURE 5A
LF INLET VALVE 6A
LF OUTLET VALVE 7A
LF SENSOR CIRCUIT FAILURE 8A
LF SENSOR CONTINUITY K 25 MPH 8A
LF SENSOR CONTINUITY J 25 MPH 8A
LF SENSOR SIGNAL MISSING 8A
LF SENSOR SPEED COMPARISON 8A
LR INLET VALVE 10A
LR OUTLET VALVE 11A
LR SENSOR CIRCUIT FAILURE 12A
LR SENSOR CONTINUITY K 25 MPH 12A
LR SENSOR CONTINUITY J 25 MPH 12A
LR SENSOR SIGNAL MISSING 12A
LR SENSOR SPEED COMPARISON 12A
MAIN RELAY/POWER CIRCUIT FAILURE 14A
SYSTEM UNDERVOLTAGE 14A
VALVE POWER FEED CIRCUIT 14A
PEDAL TRAVEL SENSOR CIRCUIT 15A
BRAKE SWITCH CIRCUIT 16A
PUMP MOTOR CIRCUIT NOT WORKING PROPERLY 17A
PUMP MOTOR RUNNING WITHOUT COMMAND 17A
PUMP MOTOR NOT RUNNING 17A
VALVE BLOCK FEED FAILURE 18A
RF INLET VALVE 19A
RF OUTLET VALVE 20A
RF SENSOR CIRCUIT FAILURE 21A
RF SENSOR CONTINUITY K 25 MPH 21A
RF SENSOR CONTINUITY J 25 MPH 21A
RF SENSOR SIGNAL MISSING 21A
RF SENSOR SPEED COMPARISON 21A
RR INLET VALVE 23A
RR OUTLET VALVE 24A
RR SENSOR CIRCUIT FAILURE 25A
RR SENSOR CONTINUITY K 25 MPH 25A
RR SENSOR CONTINUITY J 25 MPH 25A
RR SENSOR SIGNAL MISSING 25A
RR SENSOR SPEED COMPARISON 25A
TRACTION CONTROL VALVE #1 27A
TRACTION CONTROL VALVE #2 28A
SYSTEM OVERVOLTAGE 35A
(1) Replace CAB.
SYSTEM MALFUNCTION

Problem Perform Test
Inoperative LTCS 29A
Inoperative LTCS Active Light (Green) 30A
Inoperative LTCS Warning Light (Amber) 31A
Brake Warning Light (Red) Stays Illuminated 32A
ABS Warning Light (Amber) Does Not
Illuminate At Start-Up 33A
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