WINDOW AS 2G4812 - Caterpillar

Table 1
Diagnostic Trouble Codes for the Indicator Lamps
J1939 Code Description Notes
623-5 Red Stop Lamp : Current Below Normal The Electronic Control Module (ECM) detects a low current condition in the circuit for the shutdown lamp.
623-6 Red Stop Lamp : Current Above Normal The ECM detects a high current condition in the circuit for the shutdown lamp.
624-5 Amber Warning Lamp : Current Below Normal The ECM detects a low current condition in the circuit for the warning lamp.
624-6 Amber Warning Lamp : Current Above Normal The ECM detects a high current condition in the circuit for the warning lamp.
1081-5 Engine Wait to Start Lamp : Current Below Normal The ECM detects a low current condition in the circuit for the wait to start lamp.
1081-6 Engine Wait to Start Lamp : Current Above Normal The ECM detects a high current condition in the circuit for the wait to start lamp.
3697-5 Particulate Trap Lamp Command : Current Below Normal The ECM detects a low current condition in the circuit for the Diesel Particulate Filter (DPF) lamp.
3697-6 Particulate Trap Lamp Command : Current Above Normal The ECM detects a high current condition in the circuit for the DPF lamp.
3698-5 Exhaust System High Temperature Lamp Command : Current Below Normal The ECM detects a low current condition in the circuit for the High Exhaust System Temperature (HEST) lamp.
3698-6 Exhaust System High Temperature Lamp Command : Current Above Normal The ECM detects a high current condition in the circuit for the HEST lamp.
3702-5 Diesel Particulate Filter Active Regeneration Inhibited Status : Current Below Normal The ECM detects a low current condition in the circuit for the DPF disabled lamp.
3702-6 Diesel Particulate Filter Active Regeneration Inhibited Status : Current Above Normal The ECM detects a high current condition in the circuit for the DPF disabled lamp.
5099-5 Engine Oil Pressure Low Lamp Data : Current Below Normal The ECM detects a low current condition in the circuit for the low oil pressure lamp.
5099-6 Engine Oil Pressure Low Lamp Data : Current Above Normal The ECM detects a high current condition in the circuit for the low oil pressure lamp. The Engine Control Module (ECM) provides nine outputs that can be used to illuminate indicator lamps. If applicable, some of the outputs can be programmed to a J1939 device.Each J1/P1 output is a low side driver.Low Side Driver - The ECM provides a connection to ground in order to activate the lamp.J1939 Device - The ECM sends digital data on the J1939 data link in order to control the lamp.Table 2 provides information on the typical lamp outputs.
Table 2
Lamp Outputs (Typical Application)
Lamp Default Output Terminal
Regeneration Active Lamp J1/P1:74
Shutdown Lamp J1/P1:51
Warning Lamp J1/P1:92
Wait to Start Lamp J1/P1:50
Low Oil Pressure Lamp J1/P1:69
Diesel Particulate Filter (DPF) Lamp J1/P1:94
DPF Disabled Lamp J1/P1:48 Testing the CircuitsThe ECM briefly activates the lamps when the keyswitch is turned from OFF to ON.
Table 3
Troubleshooting Test Steps Values Results
1. Test the Circuit
A. Turn the keyswitch from OFF to ON in order to test the circuit.
Watch the