EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5E-67
TEST DESCRIPTION
Verify continuity between the following:
ECM 68 PIN CONNECTOR
2 TERMINAL CONNECTOR
11 2 (is shield wire, also)
12 1
Verify the sensor resistance between terminals 1 and 2 of the sensor:
RESISTANCE (Ohm)
MINIMUM - MAXIMUM MEASUREMENT
100 90 - 110
DIAGNOSTIC HELP:
Verify the following:
• Open or short in the CKT Pin 11 or CKT Pin 12.
• Defective sensor.
• Defective ECM.
• It is possible to have this failure when the two terminals in the Instrumented Injector
connector are reversed.
Failure of the rpm Signal From Injector influences engine performance as follows:
• FUEL QUANTITY ACTUATION: Maximum engine rpm is 80% of the normal
operating range (35% of fuel quantity reduction).
• TIMING ADVANCE: Timing actuation is in open loop which means the engine may
be slightly noisier.
IMPORTANT: Torque the Instrumented Injector to specification when replacing.
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