DDEC III/IV Single ECM Troubleshooting – Section 57.1 Description of Flash Code 57

Section 57.1
Description of Flash Code 57

Flash Code 57 indicates that the J1922 (Low Speed Powertrain) data link is no longer allowing the ECM, see Figure "ECM" , to transmit data.‪

This diagnostic condition is typically:‪

• Either or both of the data link circuits are open at some point in the network.
• Either or both of the data link circuits are shorted to ground at some point in the network.
• Either or both of the data link circuits are shorted to battery (+) at some point in the network.
• The pair of data link circuits are shorted together.