Replacement Flowchart for DDEC II EPROM Section 2.17.6 "Replacement Flowchart for DDEC II EPROM"įigure 6. Kent-Moore antistatic wrist strap BT-8639-B (for electrostatic discharge).The following tools are required to replace the former EPROM with the improved EPROM stabilizer kit: Note: Before beginning any repair procedures, the ignition switch must be in the OFF position. Follow the instructions supplied with the reader to clear the fault codes.
#DETROIT DIESEL DIAGNOSTIC LINK MANUAL CODE#
If any code(s) other than code 25 is logged, refer to the Detroit Diesel Single ECM Troubleshooting Manualįault codes can be cleared from the DDEC II and III/IV systems only by using a diagnostic reader. This flashing code will be repeated until the diagnostic switch is turned OFF or the jumper wire is removed from pins A and M (on DDEC II engines only). This code would indicate no trouble codes logged since the last system check. Code 25, for example, would be two flashes followed by a pause, followed by five more flashes. These methods will cause the Check Engine light to begin flashing a code when the ignition is turned to the ON position. This condition will not occur when a diagnostic reader is used. If this is done, the diagnostic mode line will be grounded, and the throttle will be forced to the idle position, affecting vehicle operation. If the vehicle is equipped with an OEM supplied diagnostic switch, the switch must NOT be switched on when operating the vehicle. Examples of Diagnostic Data Link (DDL) Connector NOTICE: If the diagnostic reader is not available, the following procedure can be used to read the fault codes using the "Check Engine" light on the dashboard of the vehicle. Using "Check Engine" light, read the DDEC II Diagnostic codes.
If operating an engine in an enclosed area, vent the exhaust to the outside.Always start and operate an engine in a well ventilated area.If any code(s) other than code 25 is logged, refer to the Detroit Diesel Single ECM Troubleshooting Manualĭiesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Observe the DDR for any diagnostic code(s). Turn the ignition to the "ON" position.Engage the lock tab on the power harness and injector harness connectors.Connect the five (5) wire harness connections at the ECM.Torque the ECM connector hold-down screws to 2.4-3.0 N Torque the ECM-to-engine bolts to 23-27 N Secure the ECM to the engine with through-bolts.Mount the ECM and cold plate to the engine.Inspect the ECM isolators for damage and replace if required.Use Loctite® 262, or equivalent, on the cold plate-to-ECM screws. Tighten the screws securing the cold plate to the ECM.
#DETROIT DIESEL DIAGNOSTIC LINK MANUAL INSTALL#
There are two diagnostic Data Readers (DDR) that can be used for diagnosis of DDEC I and DDEC II engines. Start by reading the "Basic Knowledge Required" section before attempting to diagnosis electrical faults. If the basic mechanical checks fail to locate the problem, refer the Detroit Diesel Single ECM Troubleshooting Manual, Tag defective ECM for recore. Section 2.17.2īasic mechanical checks should be made beforehand to verify that the problem is definitely related to the electrical portion of the system. The DDEC II ECM is a sealed, nonserviceable unit. Replacement of the DDEC II Electronic Control Module
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