EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002
Page 5E-63
TEST DESCRIPTION
Verify continuity between the following:
ECM 68 PIN CONNECTOR
DEVICE TERMINAL
53
Electrical Fuel Shut Off
Verify supply voltage to fuel shut off valve terminal with the wire disconnected and key ON.
Measure between the wire and the engine ground (–). Current should be present for the first
25 seconds only, and then cease, unless there is a failure.
CURRENT (VOLTS)
MINIMUM / MAXIMUM MEASUREMENT
12
Battery Voltage
Verify the resistance between the terminal on the valve and ground (–):
RESISTANCE (Ohm)
MINIMUM / MAXIMUM MEASUREMENT
7.5
±
0.5
DIAGNOSTIC HELP:
Verify the following:
•
Open or short in the CKT Pin 53.
•
Improper terminals or pins at the device connection or ECM.
•
Defective fuel shut off valve.
•
Defective ECM.
Failure of the fuel shut off valve or circuit influences engine performance as follows:
•
If the valve failed previously the engine will not start.
•
If there is a plausibility error, the engine may start but the ECM controls FUEL
QUANTITY ACTUATION: Maximum engine rpm is 80% of the normal operating
range.
•
If there was a previous failure in the Fuel Shut Off Valve circuit but it is no longer
defective, or the defect memory has not been erased (error still in memory), the
maximum engine rpm will be 80% of the normal operating range. Erase the defect
from memory and retest.
