Tools and Equipmen

Tools and Equipment
Power Supply





When testing power supply to an ECM, the DlSplus/GT1 multimeter function as well as a reputable hand held multimeter can be used.
It is best to make the checks at the ECM connection, this method includes testing the wiring harness.
The correct Universal Adapter for the MS45 application should be used (#90 88 6 121 300). This will ensure the pin connectors and the harness will not be damaged.
When installing the Universal Adapter to the ECM (located in the Electronics Box in the engine compartment), make sure the ignition is switched off.





NOTE for MS45: Allow at least 3 minutes to elapse after the key was set to the OFF position before disconnecting the ECM/ TCM.
This win allow sufficient time to complete the DM n test Voltage may be present (up to 3 minutes) causing damage to the ECM/TCM if they are disconnected during this time period (arcing).








The Engine Control Module Relay should be tested using the relay test kit (P/N 88 88 6 613 010) shown on the right.
This kit allows testing of relays from a remote position. Always consult the ETM for proper relay connections.