Navistar INTERNATIONAL DT 466 User Manual

504 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Figure 486 MAP circuit diagram
WA RNING: To avoid serious personal injury,
possible death, or damage to the engine or vehicle,
always disconnect main negative battery c
able first. Always connect the main negative battery cable
last.
Circuit Checks for MAP Sensor (Use EST, DMM, breakout harness, and 500 Ohm Resistor Harness.)
Test Condition Spec Checks
Sensor disconnected using EST
0V
If voltage > 0.039 V, che ck signal ci
rcuit for short to V
REF
or B+.
Voltage from Pin 2 (Blue) to
ground using DMM
5V±0.5V
If voltage > 5 .5 V, che ck V
REF
for short to B +. If voltage is
< 4.5 V, check V
REF
for open or short to ground.
500 Ohm Resistor Harness
connected between Pin 3
(Green) and Pin 2 (Blue) of
breakout harness using EST.
5V
If voltage < 4.9 V, check signal circuit for open or short
to ground.
— Disconnect connector 9260
1
. Measure resistance
from Pin 3 to Pin A of connector 9260 (spec > 1 kΩ)
to check for short to ground within wiring harness.
— D isconnect negative battery cable. Measure
resistancefromPin3togroundcabletocheckfor
short to ground.
— Use a breakout box from Pin 3 to Pin X2–8 (spec < 5
Ω) to check for open in the harness.
Resistance from Pin 1
(Black)
of breakout harness t
oPinAof
connector 9260 usin
gDMM
<5Ω If resistance is > 5 Ω,
check for open or high resistance
between ECM and senso
r connector. Use a breakout
box and measure resi
stance from between Pin 1 and Pin
X1–6 (spec < 5 Ω).
Connect engine harness to sensor. Use the EST to clear DTCs. If an active code remains after
checking test conditions, replace the MAP sensor.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.

Navistar INTERNATIONAL DT 466 Specifications

General

Brand	Navistar
Model	INTERNATIONAL DT 466
Category	Engine
Language	English