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8 11-14
SUBJECT
DATE
SPN 525 (CPC) (GHG14)
August 2014
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
Change
DDC-SVC-MAN-0084
DD Platform
SPN 525/FMI 7 - GHG14
This is a new Section.
All information subject to change without notice.
8 11-14
Copyright © 2014 DETROIT DIESEL CORPORATION
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2 SPN 525/FMI 7 - GHG14
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SPN 525/FMI 7 - GHG14
Internal Error with the DT12 Shift Stalk Lever
Table 1.
Shift Lever Pin Number
Signal Description
CPC Connector Pin
1
12V Ignition
2/3 Ignition
2
LIN
2/4 LIN COM
3
GND
2/2 Main Battery Ground
4
No Connection
No Connection
Check as follows:
1. Disconnect shift stalk lever.
2. Turn ignition ON (key ON, engine OFF).
3. Measure voltage between pin 1 of the shift stalk harness connector and ground. Is the voltage between 11.5 and 12
volts?
a. Yes; Go to step 4.
b. No; Go to step 9.
4. Turn ignition OFF.
5. Disconnect the Common Powertrain Controller (CPC) connector #2.
6. Inspect CPC connector #2 for bent, spread or corroded pins . Was any damage found?
a. Yes; repair as necessary.
b. No; Go to step 7.
7. Measure the resistance between pin 4 of the CPC connector #2 and pin 2 of the shift stalk lever harness connector. Is
the resistance less than 5 ohms?
a. Yes; Go to step 8.
b. No; repair wire between pin 4 of the CPC connector #2 and pin 2 of the shift stalk lever harness connector.
8. Measure the resistance between pin 2 of the CPC connector #2 and pin 3 of the shift stalk lever harness connector. Is
the resistance less than 5 ohms?
a. Yes; replace the shift stalk lever.
b. No; repair wire between pin 4 of the CPC connector #2 and pin 3 of the shift stalk lever harness connector.
9. Turn the ignition OFF.
10. Disconnect CPC connector #2.
11. Measure the resistance between pin 4 of the CPC connector #2 and pin 2 of the shift stalk lever harness connector. Is
the resistance less than 5 ohms?
a. Yes; refer to Original Equipment Manufacturer literature for chassis side harness information on Ignition supply
voltage to pin 3 of the CPC connector #2.
b. No; repair wire between pin 4 of the CPC connector #2 and pin 2 of the shift stalk lever harness connector.
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All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 8 11-14