DDEC TROUBLESHOOTING
16.3 TROUBLESHOOTING FLASH CODE 16
The following procedure will troubleshoot Flash Code 16.
16.3.1
Sensor Check
Perform the following steps to check the sensor.
1. Turn ignition OFF.
2. Disconnect Coolant Level Sensor (CLS) connector and install a jumper between sockets
A and B of the CLS harness connector.
3. Attempt to start and run engine at idle.
4. Read DDR for active codes.
[a] If active code 111/3 and any other codes except code 111/4 are logged,
refer to section 16.3.2.
[b] If active code 111/4 and any other codes are logged, refer to section 16.3.4.
5. Stop engine.
16.3.2
Signal Circuit Check
Perform the following steps to check the signal circuit.
1. Turn ignition OFF.
2. Disconnect the CLS.
3. Disconnect the vehicle harness connector.
4. Measure resistance between socket H3 (#115) on the vehicle harness connector and A
(#115 signal) of the CLS connector.
[a] If the resistance measurement is less than or equal to 5 , refer to section 16.3.3.
[b] If the resistance measurement is greater than 5 , or the signal line #115 is open,
repair the open. Refer to section 16.3.7.
16.3.3
Ground Circuit Check
Perform the following steps to check the ground circuit.
1. Measure resistance between cavity B (battery ground) of the CLS connector and battery
ground.
[a] If the resistance measurement is less than or equal to 5 , refer to section 16.3.4.
[b] If the resistance measurement is greater than 5 , or open, the ground circuit is
open. Repair and refer to section 16.3.7.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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