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PGM-FI SYSTEM
4-20
3.
IAT Sensor Inspection
Turn the ignition switch
OFF.
[2)
Disconnect the sensor unit 5P connector [1 ].
Connect the IAT sensor terminals at the wire side
with a jumper wire [2].
Connection: Gray/blue - Green/white
~
Turn the
ignition
switch ON and engine stop switch
"o
".
Check the IAT sensor with the MCS
.
Is about 0 Vindicated?
YES
- Faulty sensor unit (IAT sensor)
NO
-
GO TO STEP
4
.
4. IAT Sensor Voltage Input Line Open Circuit Inspection
Turn the ignition switch
OFF.
Disconnect the ECM 33P
(Black)
connector [1].
Check for continuity between the ECM
33P
(Black)
connector and sensor unit 5P connector [2] of the
wire side
.
Connection: Gray/blue - Gray/blue
TOOL:
Test probe (2 pack)
07ZAJ-RDJA 110
Is there continuity?
YES
- Replace the ECM with a known good one
and
recheck.
NO
- Open
circuit
in Gray/blue wire
OTC 11 (VS SENSOR)
NOTE:
[2)
Gr/Bu
Gr/Bu
G/W
(1)
[1)
Before starting the inspection
,
check for loose or poor contact on the VS sensor 3P
(Blue)
connector and
recheck the MIL blinking.
ECM
To SPEEDOMETER
VS
SENSOR
Probable cause
• Open or short circuit in Pink or White/red
wire
between the
VS
sensor and ECM
• Faulty VS sensor
• Faulty ECM
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