EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5E-39
TEST DESCRIPTION
Verify continuity between the following:
ECM 68 PIN CONNECTOR
2 TERMINAL CONNECTOR
23 / 45 / 68 1
51 2
Verify the solenoid valves resistance between terminals 1 and 2 of the connector:
RESISTANCE (Ohm)
MINIMUM / MAXIMUM MEASUREMENT
15 ± 0.0
Verify supply voltage to solenoid valve terminal connector with the connector unplugged and
key ON. Measure between terminal1 and engine ground (–):
CURRENT (VOLTS)
MINIMUM / MAXIMUM MEASUREMENT
12 Battery Voltage
DIAGNOSTIC HELP:
Verify the following:
• Open or short in the CKT Pins 23 / 45 / 68 or CKT Pin 51.
• Improper terminals or pins at the 2 terminal connector or ECM.
• Defective fuel injection pump.
• Defective ECM.
Failure of the timing governing solenoid valve influences engine performance as follows:
• FUEL QUANTITY ACTUATION: Maximum engine rpm is 80% of the normal
operating range (35% of fuel quantity reduction).
• The engine becomes noisy.
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