NHTSA ID Number: 10056982
Manufacturer Communication Number: SIB-10-10-14
TSB/Document Date: 2015-03-24
Summary
DETROIT: INFORMATION REGARDING POSITION SENSORS OF PEDAL DEVIATION BEING TOO HIGH. *PE
10 10-14
1
10 10-14
SB-10056982-3574
SUBJECT
DATE
SPN 2623 (CPC) (GHG14)
October 2014
Additions, Revisions, or Updates
Publication Number / Title
DDC-SVC-MAN-0084
Platform
GHG14 DD
Platform
Section Title
SPN 2623/FMI 2 GHG14
SPN 2623/FMI 8 GHG14
All information subject to change without notice.
10 10-14
Copyright © 2014 DETROIT DIESEL CORPORATION
Change
New steps and graphics added.
3
2 SPN 2623/FMI 2 - GHG14
2
SPN 2623/FMI 2 - GHG14
Accelerator Pedal In-Range Fault
Table 1.
SPN 2623/FMI 2
Description
Pedal Position Sensors Deviation Too High
Monitored Parameter
GAS1, GAS2
Typical Enabling Conditions
Always On
Monitor Sequence
None
Execution Frequency
Continuous When Enabling Conditions Met
Typical Duration
2 Seconds
Dash Lamps
None
Engine Reaction
None
Verification
Key Cycle - Ignition ON
Table 2.
Sensor Connector and Pinout
Function
CPC Pinout
Connector Pinout
Comments
APS1
1/7
A
Sensor 1
GND1
1/4
B
APS 1 GND
VCC1 (+5V)
1/8
C
APS1 Power Supply
VCC2 (+5V)
3/3
D
APS2 Power Supply
GND2
3/2
E
APS2 GND
APS2
4/14
F
Sensor 2
Connector Body
Harness Connector and Seal (P/N:
12066317) Terminal Female (P/N:
12103881)
Check as follows:
1. Turn the ignition ON (key ON, engine OFF).
2. Connect DiagnosticLink ®; are any other fault codes active?
a. Yes; troubleshoot any other faults first.
b. No; Go to step 3.
3. Using DiagnosticLink, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the Instrumentation/
Chart tab.
4. Cycle Accelerator Pedal (AP) slowly several times with a full sweep from top to bottom of travel. Does voltage sweep
smoothly in relation to pedal travel? Do the percentages sweep smoothly in relation to pedal travel?
a. Yes; Go to step 5.
b. No; replace the AP. Refer to Original Equipment Manufacturer (OEM) literature.
5. Clear codes and cycle ignition OFF.
6. Turn the ignition ON (key ON, engine OFF).
7. Does the code return?
a. Yes; replace the AP, clear codes and verify repair. Refer to Original Equipment Manufacturer's (OEM) literature.
b. No; Go to step 8.
8. Gently wiggle pedal and harness connector to simulate road vibration.
4
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION
10 10-14
10 10-14
NOTE: Do not disconnect the AP connector at this time.
NOTICE: Do not tap on AP with metal object or tool as this may damage component.
NOTICE: A second technician may be required to monitor values during wiggle testing.
9. While performing wiggle test, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the
DiagnosticLink Instrumentation/Chart tab.
10. Cycle AP slowly several times with a full sweep from top to bottom of travel. Do the percentages sweep smoothly in
relation to pedal travel?
a. Yes; Go to step 11.
b. No; replace the AP, clear codes and verify repair. Refer to Original Equipment Manufacturer (OEM) literature.
11. Disconnect the AP.
12. Inspect the AP and harness side connectors for signs of damaged, bent, spread, corroded or unseated (pushed out) pins
and signs of moisture in the connector or wire damage near the connector. Is any damage found?
a. Yes; repair as necessary. Verify repair.
b. No; Go to step 13.
13. Gently wiggle the Common Powertrain Controller (CPC) harness connectors to simulate road vibration.
14. While performing wiggle test, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the
DiagnosticLink Instrumentation/Chart tab.
15. Cycle AP slowly several times with a full sweep from top to bottom of travel. Do the percentages sweep smoothly in
relation to pedal travel?
a. Yes; Go to step 16.
b. No; Isolate that section of harness and inspect for wire chaffing, corrosion, improper connections or physical
damage and repair as necessary. Verify repair.
16. Disconnect the CPC #1 connector.
17. Disconnect the CPC #3 connector.
18. Disconnect the CPC #4 connector.
19. Inspect the CPC and the harness connectors for signs of damaged, bent, spread, corroded or unseated (pushed out) pins
and signs of moisture in the connector or wire damage near the connectors. Is any damage found?
a. Yes; repair as necessary. Verify repair.
b. No; replace the AP, clear codes and verify repair. Refer to Original Equipment Manufacturer (OEM) literature.
Verify repair.
All information subject to change without notice.
10 10-14
Copyright © 2014 DETROIT DIESEL CORPORATION
5
3 SPN 2623/FMI 8 - GHG14
3
SPN 2623/FMI 8 - GHG14
2-Channel Accelerator Pedal Signal 2 Missing
Table 3.
SPN 2623/FMI 8
Description
Channel 2 Sensor Signal Failed (High Or Low)
Monitored Parameter
GAS2
Typical Enabling Conditions
Always On
Monitor Sequence
None
Execution Frequency
Continuous When Enabling Conditions Met
Typical Duration
2 Seconds
Dash Lamps
CEL
Engine Reaction
None
Verification
Key Cycle - Ignition ON
Check as follows:
1. Disconnect the Accelerator Pedal (AP).
2. Inspect the AP and harness side connectors for signs of damaged, bent, spread, corroded or unseated (pushed out) pins
and signs of moisture in the connector or wire damage near the connector. Is any damage found?
a. Yes; repair as necessary. Verify repair.
b. No; Go to step 3.
3. Turn the ignition ON (key ON, engine OFF).
6
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION
10 10-14
10 10-14
Table 4.
Sensor Connector and Pinout
Function
CPC Pinout
Connector Pinout
Comments
APS1
1/7
A
Sensor 1
GND1
1/4
B
APS 1 GND
VCC1 (+5V)
1/8
C
APS1 Power Supply
VCC2 (+5V)
3/3
D
APS2 Power Supply
GND2
3/2
E
APS2 GND
APS2
4/14
F
Sensor 2
Connector Body
Harness Connector and Seal (P/N:
12066317) Terminal Female (P/N:
12103881)
4. Measure the voltage between pins D and E of the AP harness connector. Is the voltage between 4.5 and 5.5 volts.
a. Yes; Go to step 6.
b. No; Go to step 5.
5. Measure the voltage between pin D of the AP harness connector and ground. Is the voltage between 4.5 and 5.5 volts?
a. Yes; repair the open circuit between pin E of the AP harness connector and pin 2 of the Common Powertrain
Controller (CPC) #3 connector. Verify repair.
b. No; repair the circuit between pin D of the AP harness connector and pin 3 of the CPC #3 connector. Verify
repair.
6. Measure the voltage between pin F of the AP harness connector and ground. Is any voltage present?
a. Yes; repair the short to power between pin F of the AP harness connector and pin 14 of the CPC #4 connector.
Verify repair.
b. No; Go to step 7.
7. Turn the ignition OFF.
8. Disconnect the CPC #4 connector.
9. Inspect the CPC and the harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins
and signs of moisture in the connector or wire damage near the connector. Is any damage found?
a. Yes; repair as necessary. Verify repair.
b. No; Go to step 10.
10. Measure the resistance between pin F of the AP harness connector and pin 14 of the CPC #4 connector. Is the
resistance less than 5 ohms?
a. Yes; Go to step 11.
b. No; repair the open circuit between pin F of the AP harness connector and pin 14 of the CPC #4 connector.
11. Measure the resistance between pin F of the AP harness connector and ground. Is the resistance greater than 10K
ohms?
a. Yes; replace the AP. Refer to Original Equipment Manufacturer (OEM) literature.
b. No; repair the short to ground circuit between pin F of the AP harness connector and pin 14 of the CPC #4
connector.
All information subject to change without notice.
10 10-14
Copyright © 2014 DETROIT DIESEL CORPORATION
7
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TSB/Document ID: SIB-10-10-14
Replacement Service Bulletin Number:
MFR Communication Date: 2014-10-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
MFR Component System:
MFR Component Subsystem:
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