Cold Start Injector: Testing and Inspection

COLD START SYSTEM

TEST





WARNING: THIS TEST RESULTS IN FUEL VAPOR BEING PRESENT IN THE ENGINE COMPARTMENT. IT IS THEREFORE IMPERATIVE THAT ALL DUE PRECAUTIONS ARE TAKEN AGAINST FIRE AND EXPLOSION.

1 Remove two setscrews and washers securing cold start injectors to inlet manifolds. Remove cold start injectors.

2 Arrange containers to collect sprayed fuel.

3 Disconnect -ve terminal from ignition coil.

NOTE: If engine is cold (below 15°C), proceed with operations 4 and 5. If engine is hot (above 15°C) proceed with operations 7 to 11.

4 Switch on ignition and observe cold start injectors for fuel leakage. Crank engine one or two revolutions. Injectors should spray while engine cranks.

NOTE: Do not operate starter motor longer than necessary to make this, and the following observations. 5 If injectors do not spray, carry out the following tests.

a Crank engine. Check for battery voltage at cold start injector supply (White/Pink cable). If yes:

check all electrical plug and earth connections to cold start injectors. If satisfactory, cold start injectors are suspect. If no: Proceed to test (b).

b Crank engine. Check for battery voltage at terminal 87. If yes: Check cables between cold start relay and cold start injectors. If no: Proceed to test (c).

c Crank engine. Check for battery voltage at terminal 30. If yes: Cold start relay not energized or contacts faulty. Proceed to test (d). If no: Check supply from pump relay.

d Crank engine. Check for battery voltage at terminal 86. If yes: Cold start relay not energized or contacts faulty. Proceed to test (e).

Disconnect lead at terminal 85.

5 Check for battery voltage at terminal 85. If yes:

Bridge terminal 85 to earth. Cold start relay should energize check voltage at terminal 87. If OV, replace relay. If satisfactory, check cables and connections to thermotime switch. If satisfactory, thermotime switch is suspect. If no: Replace cold start relay.

6 Replace cold start injectors and all cables and connectors removed.

7 Crank engine. Voltage at terminal 87 of cold start relay must be OV.

8 If battery voltage present, disconnect terminal 85. Crank engine and re-check voltage at terminal 87.

9 If voltage at terminal 87 is OV, thermotime switch is faulty and should be replaced.

10 If battery voltage is present, replace cold start relay.

11 If cold start injectors pass fuel while voltage at terminal 87 is OV, injector(s) must be renewed.