DIAGNOSTIC CODE 7-6

Checking for an internal short to ground, or voltage in the pump

Do not check continuity between Deutsch pins A, E and F.

If there is continuity with another pin, continue with the next step.

If there is no continuity, proceed to Test 8.

2.Visually inspect the pins and crimps in injection pump harness for the cause of the open.

If there is a repairable condition, repair. Retest to be sure the problem has been corrected.

1.Check continuity: Choose one of the following pins: Deutsch pin A, E or F. Check continuity between the pin you chose and each of the remaining pins (not including the original three selected) on the pump connector (one at a time). For example, if you choose pin A, check continuity between pin A and pins B, C, D, G, H, and J; but not between pin A and pins E or F. Also check continuity between the pin you chose and the case.

If there is not a repairable condition, send the pump to a certified pump shop for repair of the pump or integral jumper harness. Then retest to be sure the problem has been corrected.

Test 8

DIAGNOSTIC CODE 7-6

Checking for a short to voltage on any rack position sensor line in the harness

1.Disconnect the J1A and J1B connectors from the V-MAC II module.

2.Connect the serial link jumper into the serial communication port.

3.Measure the voltage from J1A connector pin K1 (the rack position sensor signal [+] line) to a good ground.

4.Measure the voltage from J1A connector pin K2 (the rack position sensor signal [+] line) to a good ground.

5.Measure the voltage from J1A connector pin J3 (the rack position sensor signal [+] line) to a good ground.

If the voltage is greater than 0.5 volts on any of the lines, locate and repair the short in the harness or connectors. Retest to be sure the problem has been corrected.

If the voltage is less than 0.5 volts on all of the lines, proceed to Test 16.