Electric fault tracing in EDC systems Specifications General information Technical data Before you start electric fault tracing, check the follow- ing: Measurement of control solenoid The figures in brackets are also found in the “Wiring di- agrams“ chapter at the back of this manual and in the “Component description“ chapter. Fault codes Fuel level and filter Air filter Battery Cables (visual) Main switch, fuses, connectors Relay connections Control unit, (16) Voltage........................................................... 9 – 32 V Connector ...................................................... 42-poligt Electric fault finding can be done on the following com- ponents:
Fuel pump control solenoid, engine speed sensor and position sensor. Coolant temperature sensor. Charge air temperature sensor. Components in injector pump actuator, (17, 18, 19) Do all measurements with a multimeter set for resist- ance measurement. Position sensor ......................................inductive type Measurement of components in the injection pump Speed sensor .........................................inductive type 2. Use a multimeter to measure between pins 2 and 7. The multimeter should show 0.6 – 1.1 Ω . Control solenoid .....................................inductive type Measurement of position sensor Relays, (5, 6, 7) Type .....................................
Switching, 24 V, 10/20 A TWD1231VE TWD740VE 1. Undo the connector on the injection pump acutator. Connector (14) Connector .............................................. 2 pcs. 16 pin (please refer to the label on the inside of the junction box) 3a.Use a multimeter to measure between pins 1 and 6. The multimeter should show 18 -22 Ω . 42 11