Series 60 DDEC V Troubleshooting – Section 20.4 Amber Warning Lamp and Red Stop Lamp Fault

Section 20.4
Amber Warning Lamp and Red Stop Lamp Fault

Use the following steps to troubleshoot a fault with the CEL/AWL or SEL/RSL. These lights are used to alert the operator of engine faults and flash any trouble codes stored in the ECM/ECU. The lights illuminate for five seconds and then go out during a start sequence, as a bulb check.‪

Section 20.4.1
Determine Fault

Perform the following to determine fault:‪

1. If the CEL/AWL or SEL/RSL is always on, refer to "20.4.2 Display ECM/ECU Light Status" .
2. If the CEL/AWL or SEL/RSL never lights, refer to "20.4.4 Activate Light With Diagnostic Data Reader" .

Section 20.4.2
Display ECM/ECU Light Status

Perform the following steps to display light status:‪

1. While the light is lit, plug in the DDR (ignition ON).
2. Select switch light status.
3. View the displayed status for the problem light.
   1. If status reads OFF, refer to "20.4.3 Check for Grounded Wire" .
   2. If status reads ON, go to step 4 .
4. Verify the diagnostic request is not ON.
   1. If the diagnostic request is ON, refer to "20.10 Engine Brake Inoperative" .
   2. If the diagnostic request is not ON, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .

Section 20.4.3
Check for Grounded Wire

Perform the following steps to check for a grounded wire:‪

1. Turn ignition OFF.
2. Unplug vehicle connector.
3. Turn ignition ON.
   1. If the light stays on, drive (V-2 or V-1) wire is shorted to the ground. Repair or replace the wire. Refer to "20.4.5.1 Verify Repairs" .
   2. If the light goes off, clean the connectors of the vehicle connector and assemble again. Then, refer to "20.4.5.1 Verify Repairs" .

Section 20.4.4
Activate Light With Diagnostic Data Reader

Perform the following steps to activate the light with the DDR:‪

1. Turn ignition ON.
2. Plug in DDR.
3. Select Activate Outputs.
4. Activate affected light; watch status.
   1. If the light stays off. go to step 5 .
   2. If the light illuminates, the problem no longer exists. Refer to DDEC V Application and Installation manual, 7SA821, to review the light operation.
5. To check the bulb, turn ignition OFF and refer to OEM recommendations for checking the bulb..
   1. If the bulb is bad, replace the bulb and refer to "20.4.5.1 Verify Repairs" .
   2. If the bulb is okay, refer to "20.4.5 Check for Voltage Supply" .

Section 20.4.5
Check for Voltage Supply

Perform the following steps to check the voltage supply:‪

1. Disconnect the power supply to the light.
2. Turn ignition ON.
3. Measure voltage between the removed connection and battery ground.
   1. If the voltage is correct based on the system of the vehicle (12V/24V), go to step 4 .
   2. If the voltage is too low to expect the bulb to light, refer to the OEM recommendations to resolve the problem. Refer to "20.4.5.1 Verify Repairs" .
4. To check for an open output wire, measure the resistance between the ground side of the connector of the light and the battery ground.
   1. If the measured resistance is 45,000 to 48,000 Ω, clean the connections. Refer to "20.4.5.1 Verify Repairs" .
   2. If the measured resistance is less than 45,000 Ω or greater than 48,000 Ω, the wire is shorted to voltage, or is opened. Repair wire. Refer to "20.4.5.1 Verify Repairs" .

Section 20.4.5.1
Verify Repairs

Perform the following steps to verify repairs.‪

1. Ensure all removed connections are installed.
2. Turn ignition ON.
   1. If the light comes on for five seconds, then goes out, troubleshooting is complete.
   2. If the light comes on and stays on, refer to "20.4.1 Determine Fault" .
   3. If the light does not turn on, all troubleshooting is complete. Review this section and contact Detroit Diesel Customer Service Center (313–592–5800).