43.3 TROUBLESHOOTING FLASH CODE 43
The following procedure will troubleshoot Flash Code 43.
Coolant Level Low
Perform the following steps to diagnose the coolant level low.
1. Turn ignition ON; plug in DDR.
2. Read active codes.
[a] If code 111-1 is logged, there is an indication of a low coolant level condition. Add
coolant to ensure coolant level probe is immersed in coolant.
[b] If code 111-1 remains active, refer to section 43.3.2.
Replace Coolant Level Sensor
Using the sensor tester may be of assistance. Use Tool J 37164.
When replacing the coolant level sensor, the CLS could be an OEM supplied part.
1. Turn ignition OFF; replace CLS.
2. Turn ignition ON.
3. Read active codes.
[a] If no codes are logged, troubleshooting is complete.
[b] If codes are logged, refer to section 43.3.3.
Clean and Check Alternator Grounds
Perform the following steps to check the alternator ground.
1. If the grounds are clean and good, troubleshooting is complete.
2. If the grounds are damaged, repair the ground circuit and verify repairs.
Refer to section 43.3.4.
Perform the following steps to verify repairs
1. Turn ignition OFF.
2. Reconnect all connectors.
3. Turn ignition ON.
4. Clear DDR codes.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION