Test Point 2 - Power Supply for DME Control Unit and Fuel Pump
TEST POINT 2Fuel Pump Power Supply
1. Fuel pump must run already while starting engine.
If not, check fuse 16 (16 amps).
2. If fuse is okay, bridge voltage with a test lead from fuse 17 to fuse 16.
Fuel pump must run.
3. If fuel pump does not run, fault is either in power supply wire or pump itself.
DME Relay
1. Pull off plug on DME relay. Bridge terminals 30 and 87 b on plug.
Fuel pump must run.
2. Turn on ignition.
Terminal 86 must have positive (15) and terminal 85 must have ground (31).
3. Activation of DME control unit with ground potential takes place on terminal 85b.
Bridge terminals 30 and 87. Terminal 85 b must have ground while starting engine.
DME Control Unit Power Supply
Note: This test should only be made, if no fault was found in previous points of Test Point 2 and engine cannot be started.
1. Turn off ignition and pull off multiple pin plug on DME control unit Connect DME relay.
2. Turn on ignition and measure voltage between terminals 35 and 5 as well as 18 and 5 with a voltmeter
(Tester only connected with help of test leads.)
Specification: battery voltage