General Information
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 WARNING
This diagram is provided as a diagnostic tool for trained, experienced technicians only. Troubleshooting presents the risk of equipment damage, personal injury, or death. Troubleshooting must be performed by trained, experienced technicians. See important instructions in the service manual.
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Electrical Specifications
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SAE™ J1939 BACKBONE RESISTANCE
High wire to low wire
50 to 70 Ohms
SAE J1939 Termination Resistance
110 to 130 Ohms
ALL CONTINUITY CHECKS
OK (no open circuit) if less than 10 Ohms
ALL SHORTS TO GROUND
All circuits, OK (no short circuit), if more than 100k Ohms
SHORT CIRCUIT TO EXTERNAL VOLTAGE
OK if less than 1.5 VDC
5 VOLT POWER SUPPLY (Sensor Only)
@ ECM/Harness: 4.75 to 5.25 VDC
SOLENOIDS
Fuel Shutoff Valve Coil Resistance
7 to 8 Ohms
Injector
0.5 to 1.5 Ohms after subtracting the multimeter resistance
ECM CONNECTOR
Retaining Capscrew Torque = 3 N•m [25 in-lb]
INJECTOR
Pigtail Retaining Nut Torque = 1.6 N•m [14 in-lb]
NOTE: To convert gauge pressure on all psia sensors, subtract the barometric pressure from the absolute pressure.
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Sensor Specifications
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| INTAKE MANIFOLD AIR PRESSURE SENSOR |
| Torque (threaded style) = 14 N•m [124 in-lb] |
| Pressure (mm Hg) |
Pressure [in Hg] |
Pressure [psia] |
Voltage (VDC) |
| 0 |
0 |
0 |
0.42 to 0.58 |
| 646.48 |
25.45 |
12.5 |
1.42 to 1.58 |
| 1292.88 |
50.90 |
25 |
2.42 to 2.58 |
| 1939.36 |
76.35 |
37.5 |
3.42 to 3.58 |
| 2585.76 |
101.80 |
50 |
4.42 to 4.58 |
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| AMBIENT AIR PRESSURE SENSOR |
| Torque = 14 N•m [124 in lb] |
| Altitude (m) |
Altitude (ft) |
Pressure (psia) |
Pressure (in Hg) |
Voltage (VDC) |
| 0 (sea level) |
0 |
14.7 |
29.9 |
3.65 to 4.28 |
| 915 |
3000 |
13.2 |
26.9 |
3.06 to 3.60 |
| 1830 |
6000 |
11.8 |
24.0 |
2.52 to 2.96 |
| 2744 |
9000 |
10.5 |
21.4 |
2.01 to 2.36 |
| 3659 |
12000 |
9.35 |
19.0 |
1.57 to 1.84 |
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| OIL PRESSURE SENSOR |
| Torque (threaded style) = 14 N•m [124 in-lb] |
| Pressure (kPa) |
Pressure [psia] |
Voltage (VDC) |
| 0 |
14.7 |
0.70 to 1.20 |
| 172.37 |
40 |
2.10 to 2.70 |
| 344.74 |
65 |
3.50 to 4.20 |
| 414.11 |
75 |
4.00 to 4.70 |
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| ALL TEMPERATURE SENSORS |
| Torque = 14 N•m [124 in-lb] |
| Temperature (°C) |
Temperature [°F] |
Resistance (Ohms) |
| 0 |
32 |
30k to 36k |
| 25 |
77 |
9k to 11k |
| 50 |
122 |
3k to 4k |
| 75 |
167 |
1350 to 1500 |
| 100 |
212 |
600 to 675 |
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| ENGINE POSITION SENSOR |
| Torque = 20 N•m [177 in-lb] |
| First Coil Resistance = 1000 to 2000 Ohms |
| Second Coil Resistance = 1000 to 2000 Ohms |
| ENGINE COOLANT LEVEL SWITCH |
| Torque = 8 N•m [70 in-lb] |
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Last Modified: 30-Nov-2007
Published by Jack
Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.
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