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PGM-FI SYSTEM
4-18
3. TP Sensor Resistance Inspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) connector [1].
Measure the resistance at the ECM 33P (Black)
connector of the wire side.
Connection
:
Yellow - Green/white
Standard:
0.29 - 0.71
Q
(20°C/68°F)
Is the resistance within 0.29 -
o.
71 fl?
YES
- GO TO STEP
4.
NO
- Faulty sensor unit (TP sensor)
4. TP Sensor Power Input Voltage Inspection
Connect the ECM 33P (Black)
connector.
Disconnect the sensor unit 5P connector [1 ].
Turn the ignition switch ON and engine stop switch
110
".
Measure the voltage at the sensor unit 5P connector
of the wire side
.
Connection: Yellow/red (+) - Green/white(-)
Standard:
4.75 - 5.25 V
Is the voltage within 4. 75 - 5.25 V?
YES
- Replace the ECM with a known good one
and recheck.
NO
- • Open circuit in Green/white wire
• Open circuit in Yellow/red wire
OTC 9 (IAT SENSOR)
[1]
(1]
5V
SENSOR UNIT
_L
(IAT SENSOR)
Gr/Bu
GIW
-i
Probable cause
• Open or short circuit in Gray/blue wire between the sensor unit and ECM
• Open circuit in Green/white wire between the sensor unit and ECM
• Faulty sensor unit
• Faulty ECM
ECM
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