EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5E-41
TEST DESCRIPTION
NOTE: Constant voltage may be observed at the very first part and the very last part of the
TP’s rotation.
Verify continuity between the following:
ECM 68 PIN CONNECTOR
7 TERMINAL CONNECTOR
15 1
57 2
55 4
65 5
1 6
Verify supply voltage to TP sensor with the 7 terminal connector unplugged and key ON.
Measure between terminals 2 and 4 of the harness side connector:
CURRENT (VOLTS)
MINIMUM / MAXIMUM MEASUREMENT
5
Verify the TP sensor potentiometer current flow between terminals 4 and 5 of the sensor with
the 7 terminal connector plugged in and key ON:
CURRENT (VOLTS)
MINIMUM / MAXIMUM MEASUREMENT
5
With the key OFF and the 7 terminal connector unplugged, verify the TP sensor
potentiometer resistance between terminals 1 and 4 of the sensor connector:
CONDITION
RESISTANCE (Ohm)
MINIMUM / MAXIMUM
MEASUREMENT
TP at Idle Position 1050 ± 100
TP at WOT Position 1650 ± 100
DIAGNOSTIC HELP:
Verify the following:
• Open or short in the CKT Pin 2, CKT Pin 5 or CKT Pins 1.
• Improper terminals or pins at the 7 terminal connector or ECM.
• Defective TP sensor.
• Defective ECM.
Failure of the TP sensor influences engine performance as follows:
• Any failure of the TP sensor or circuits (e. g. plausibility between TP sensor and low
idle switch, TP out of operating range, LGS defective, TP voltage supply defective)
will cause the engine to operate at 800 rpm maximum.
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