DDEC VI SERIES 60 TROUBLESHOOTING GUIDE
34.2 SPN 723/FMI 4
A typical diagnosis is a short to ground.
34.2.1
Short to Ground Check
Perform the following step to troubleshoot a short to ground.
1. Disconnect the CMP Sensor.
2. Measure the resistance between pin 1 of the CMP Sensor and ground. See Figure 34-2.
Figure 34-2
MCM — Camshaft Position Sensor Schematic
[a] If the resistance is greater than 5
Ω
, go to step 3.
[b] If the resistance is less than 5
Ω
, replace the CMP Sensor.Refer to section 34.2.1.1.
3. Measure the resistance between pin 2 of the CMP Sensor and ground.
[a] If the resistance is greater than 5
Ω
, go to step 4.
[b] If the resistance is less than 5
Ω
, replace the CMP Sensor.Refer to section 34.2.1.1.
4. Disconnect 120-pin MCM connector.
5. Measure the resistance across pins 1 and 2 of the CMP harness connector.
[a] If the resistance is greater than 5
Ω
, go to step 6.
[b] If the resistance is less than 5
Ω
, repair the short between pins 1 and 2 of the
CMP harness connector and pins 44 and 45 of the 120–pin MCM connector.
Refer to section 34.2.1.1.
6. Measure the resistance between pin 1 of the CMP harness connector and ground.
[a] If the resistance is greater than 5
Ω
, go to step 7.
All information subject to change without notice.
PRELIMINARY 6SE567 0512
Copyright © 2005 DETROIT DIESEL CORPORATION
34-5
Summary of Contents for Series 60 DDEC VI
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Page 89: ...4 SPN 84 VEHICLE SPEED SENSOR Section Page 4 1 SPN 84 FMI 3 4 3 4 2 SPN 84 FMI 4 4 4 ...
Page 93: ...5 SPN 86 ADAPTIVE CRUISE CONTROL FAULT Section Page 5 1 SPN 86 FMI 14 5 3 ...
Page 201: ...21 SPN 625 CAN FAULT Section Page 21 1 SPN 625 FMI 2 9 10 13 14 21 3 21 2 SPN 625 FMI 4 21 5 ...