
Table 89
Diagnostic Trouble Codes
J1939
Code
Code Description
Comments
1485-7
ECM Main Relay : Not Responding
Properly
The Electronic Control Module (ECM) detects that the battery supply voltage is still present
0.5 seconds after the shut-off request from the ECM.
The warning lamp will come on.
The ECM is receiving battery voltage after the keyswitch has been turned OFF, which will
drain battery power.
1485-14
ECM Main relay : Special Instruction
The ECM requires battery voltage for up to 60 seconds after the keyswitch has been turned
OFF.
A fault is caused when the ECM has lost battery voltage before this period has elapsed.
The fault is detected the next time the keyswitch is turned ON. The diagnostic code be-
comes active when the fault is detected for three consecutive starts.
The warning lamp will come on.
This condition is most likely caused by shutting the engine down using the battery discon-
nect switch instead of the keyswitch for three consecutive shutdowns or using the battery
disconnect switch immediately after the keyswitch has been turned OFF.
2840-14
ECU Instance : Special Instruction
The ECM was unable to write data to the internal memory.
This condition is most likely caused by removing battery power from the ECM while the
ECM was attempting to write data to the internal memory.
Follow the troubleshooting procedure in order to identify the root cause of the problem.
180
UENR0612
This document has been printed from SPI2. NOT FOR RESALE