NHTSA ID Number: 10130366
Manufacturer Communication Number: 0510-16 SPN 2623
TSB/Document Date: 2018-03-13
Summary
SPN 2623 (CPC)(GHG17), SPN 2623 (CPC)(GHG14), and SPN 2623 (CPC)(EPA07 EPA10 GHG14)
05 10-16
1
05 10-16
SUBJECT
DATE
SPN 2623 (CPC)(GHG17), SPN 2623 (CPC)(GHG14), and SPN
2623 (CPC)(EPA07;EPA10;GHG14)
May 2016
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
Change
DDC-SVC-MAN-0193
GHG17 DD
Medium Duty
SPN 2623/FMI 2, 8, 14 GHG17
New DD5 and DD8 diagnostic procedures
DDC-SVC-MAN-0191
DD Platform HDEP
SPN 2623/FMI 2, 8, 14 GHG17
Updated GHG17 HDEP diagnostic procedures
DDC-SVC-MAN-0084
DD Platform HDEP
SPN 2623/ FMI 2, 8 GHG14
SPN 2623/FMI 14 - EPA07EPA10-GHG14
Updated EPA07, EPA10 & GHG14 HDEP
diagnostic procedures
DiagnosticLink users: Please update the troubleshooting guides in DiagnosticLink with this newest version. To update the
tool troubleshooting guide, open DiagnosticLink and from the Help – Troubleshooting Guides menu, select the appropriate
troubleshooting manual, then click Update.
All information subject to change without notice.
05 10-16
Copyright © 2016 DETROIT DIESEL CORPORATION
3
2 SPN 2623/FMI 2 - GHG17
2
SPN 2623/FMI 2 - GHG17
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
Two Seconds
Dash Lamps
None
Engine Reaction
None
Verification
Key Cycle - Ignition ON
Figure 1. Analog Pedal Type
4
All information subject to change without notice.
Copyright © 2016 DETROIT DIESEL CORPORATION 05 10-16
05 10-16
Figure 2. Dual-Channel Analog Pedal
Table 2.
Williams Dual-Channel Pedal 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
Check as follows:
1. Turn the ignition ON (key ON, engine OFF).
2. Connect DiagnosticLink®; are any SPN 91/FMI 0, FMI 2, FMI 4, or FMI 8 fault codes active?
a. Yes; troubleshoot other faults first.
b. No; Go to step 3.
3. Check for proper configuration of the CPC against the server information. Does the CPC pedal type have the proper
configuration?
a. Yes; Go to step 4.
b. No; reprogram the CPC with the correct information as necessary. Verify repair.
4. Disconnect the AP.
5. 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 6.
6. Measure the voltage between pin B of the AP harness connector and ground. Is voltage present?
All information subject to change without notice.
05 10-16
Copyright © 2016 DETROIT DIESEL CORPORATION
5
2 SPN 2623/FMI 2 - GHG17
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
a. Yes; repair a short to power between pin B of the AP harness connector and pin 4 of the CPC #1 connector.
Verify repair.
b. No; Go to step 7.
Measure the voltage between pin A of the AP harness connector and ground. Is voltage present?
a. Yes; repair a short to power between pin A of the AP harness connector and pin 7 of the CPC #1 connector.
Verify repair.
b. No; Go to step 8.
Is the vehicle equipped with a Williams Dual-Channel Analog Pedal?
a. Yes; Go to step 9.
b. No; Go to step 11.
Measure the voltage between pin F of the AP harness connector and ground. Is voltage present?
a. Yes; repair a 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 10.
Measure the voltage between pin E of the AP harness connector and ground. Is voltage present?
a. Yes; repair a short to power between pin E of the AP harness connector and pin 2 of the CPC #3 connector.
Verify repair.
b. No; Go to step 12.
Measure the voltage between pin F of the AP harness connector and ground. Is voltage present?
a. Yes; repair a short to power between pin F of the AP harness connector and pin 2 of the CPC #2 connector.
Verify repair.
b. No; Go to step 12.
Reconnect the AP.
Using DiagnosticLink, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the Instrumentation/
Chart tab.
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 15.
b. No; replace the AP. Refer to Original Equipment Manufacturer (OEM) literature.
Clear codes and cycle ignition OFF.
Turn the ignition ON (key ON, engine OFF).
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 18.
Gently wiggle pedal and harness connector to simulate road vibration.
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.
19. While performing wiggle test, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the
DiagnosticLink Instrumentation/Chart tab.
20. 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 21.
b. No; replace the AP, clear codes and verify repair. Refer to Original Equipment Manufacturer (OEM) literature.
21. Gently wiggle the Common Powertrain Controller (CPC) harness connectors to simulate road vibration.
22. While performing wiggle test, monitor PWM Pedal Signal GAS1 and PWM Pedal Signal GAS2 under the
DiagnosticLink Instrumentation/Chart tab.
23. 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 24.
6
All information subject to change without notice.
Copyright © 2016 DETROIT DIESEL CORPORATION 05 10-16
05 10-16
24.
25.
26.
27.
b. No; isolate that section of harness and inspect for wire chaffing, corrosion, improper connections or physical
damage and repair as necessary. Verify repair.
Disconnect the CPC #1 connector.
Disconnect the CPC #3 connector.
Disconnect the CPC #4 connector.
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.
05 10-16
Copyright © 2016 DETROIT DIESEL CORPORATION
7
3 SPN 2623/FMI 8 - GHG17
3
SPN 2623/FMI 8 - GHG17
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
Two Seconds
Dash Lamps
CEL
Engine Reaction
None
Verification
Key Cycle - Ignition ON
Figure 3. Analog Pedal Type
8
All information subject to change without notice.
Copyright © 2016 DETROIT DIESEL CORPORATION 05 10-16
05 10-16
Figure 4. Dual-Channel Analog Pedal
Table 4.
Williams Dual-Channel Pedal 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
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).
4. Measure the voltage between pin B of the AP harness connector and ground. Is voltage present?
a. Yes; repair the short to power between pin B of the AP harness connector and pin 4 of the CPC #1 connector.
Verify repair.
b. No; Go to step 5.
5. Is the vehicle equipped with a Williams Dual-Channel Analog Pedal?
a. Yes; Go to step 6.
b. No; Go to step 12.
6. Measure the resistance between pin D of the AP harness connector and pin 3 of the CPC #3 connector. Is the
resistance less than five ohms?
All information subject to change without notice.
05 10-16
Copyright © 2016 DETROIT DIESEL CORPORATION
9
3 SPN 2623/FMI 8 - GHG17
7.
8.
9.
10.
11.
12.
13.
10
a. Yes; Go to step 7.
b. No; repair the open circuit between pin D of the AP harness connector and pin 3 of the CPC #3 connector.
Verify repair.
Measure the voltage between pin D of the AP harness connector and ground. Is voltage greater than 5.5 volts?
a. Yes; repair the short to battery power between pin D of the AP harness connector and pin 3 of the CPC #3
connector. Verify repair.
b. No; Go to step 8.
Measure the voltage between pin E of the AP harness connector and ground. Is voltage present?
a. Yes; repair the short to power between pin E of the AP harness connector and pin 2 of the CPC #3 connector.
Verify repair.
b. No; Go to step 9.
Measure the resistance between pin F of the AP harness connector and pin 14 of the CPC #4 connector. Is the
resistance less than five ohms?
a. Yes; Go to step 10.
b. No; repair the open circuit between pin F of the AP harness connector and pin 14 of the CPC #4 connector.
Verify repair.
Measure the resistance between pin F of the AP harness connector and ground. Is the resistance greater than 10K
ohms?
a. Yes; Go to step 11.
b. No; repair the short to ground circuit between pin F of the AP harness connector and pin 14 of the CPC #4
connector. Verify repair.
Measure the voltage between pin F of the AP harness connector and ground. Is 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; replace the AP. Refer to Original Equipment Manufacturer (OEM) literature.
Measure the resistance between pin F of the AP harness connector and pin 2 of the CPC #2 connector. Is the resistance
less than five ohms?
a. Yes; Go to step 13.
b. No; repair the open circuit between pin F and pin 2 of the CPC #2 connector. Verify repair.
Measure the voltage between pin F of the AP harness connector and ground. Is voltage present?
a. Yes; repair the short to power between pin F of the AP harness connector and pin 2 of the CPC #2 connector.
Verify repair.
b. No; replace the AP. Refer to Original Equipment Manufacturer (OEM) literature. Verify repair.
All information subject to change without notice.
Copyright © 2016 DETROIT DIESEL CORPORATION 05 10-16
05 10-16
4
SPN 2623/FMI 14 - GHG17
2-Channel Accelerator Pedal GAS1 and GAS2 Signal Missing
Table 5.
SPN 2623/FMI 14
Description
PWM Pedal Signal is Missing
Monitored Parameter
CAN Communication
Typical Enabling Conditions
Always Enabled
Monitor Sequence
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 0510-16 SPN 2623
Replacement Service Bulletin Number:
MFR Communication Date: 2016-05-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:ELECTRICAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- 🎉[OTOFIX D1 Lite, Perfect Cost-effective Diagnostic Tool]: OTOFIX D1 Lite, a newest bidirectional scan tool from OTOFIX company, is a great choice for DIYers and repair shops. 👉This obd2 scanner diagnostic tool packs all practical functions: OE level all systems diagnoses, Bi-Directional Control, 38+ reset services fixing 99% of common problems, support DoIP & CANDF protocols and FCA
AutoAuth, high-end hardware configuration. Worldwide vehicles and 🔥2 Years Free Updating🔥 covered. - 🎉[Bi-Directional Scan Tool, Active Test]: OTOFIX D1 Lite bluetooth obd2 scanner can also command ECUs and monitor the operation of the actuators to track down the problems of certain parts, like windows, sunroof, wipers, fuel pumps, etc., saving repair time & trouble. This makes OTOFIX D1 Lite the most cost-effective bidirectional scan tool.
- 🎉[2026 Newest, 38+ Hot Reset Functions]: Equipped with 38+ reset functions in one, the OTOFIX D1 lite automotive scanner diagnostic tool allows you to troubleshoot 99% of common vehicle problems. You can use this car diagnostic scanner holding enough functions to easily repair common vehicle models in your repair shops. Including Oil Reset, Injector Coding, Throttle, DPF Reset, SCR Reset, Gear Learning, Clutch Learning, Suspension, etc. Note* Reset functions vary by model.
- 🎉[OE Level Full Systems Diagnostics]: Unlike the 2-system and 4-system diagnostic tools, the OTOFIX auto scan tool can complete comprehensive system diagnostics within 5 minutes. It accesses and scans all available onboard systems like for Engine /AT /ABS /EPB /BMS /TPMS /SRS /SAS /Audio System /BCM /Air Conditioning / etc., to read & clear codes, view live data, and check ECU information. Note: Active test is not involved.
- 🎉[Powerful Hardware Configuration]: Designed with a fashion appearance & a 7” touchscreen and a weight of 463g, this OTOFIX D1 Lite OBD2 diagnostic scanner scan tool is convenient for everywhere and easy to use & store. Android9.0 OS and 2+64GB memory enhance multi-task smoothness and diagnostic operation, no more wasting too much time. 5800mAh battery allows hours-lasting use. WiFi & VCI1 also bring faster communication for your diagnostics.
AutoAuth, high-end hardware configuration. Worldwide vehicles and 🔥2 Years Free Updating🔥 covered.
- 🏆【2026 TOP OBD2 Scanner Diagnostic Tool】OTOFIX D1 Lite wireless obd2 scanner has upgraded hardware configuration and car coverage. The newly upgraded D1 Lite with 🔥OS Android 9.0🔥1.5Ghz 4 core high efficiency processor🔥2GB RAM+64GB ROM large storage🔥5800mAh large battery, more stable and longer lasting diagnostics🔥 38+ Reset🔥action tests🔥full system diagnostic🔥Supports MV105 endoscope🔥21+ Language Supports🔥100000+ vehicle coverage to meet all your daily maintenance needs.
- 👍【Bi-Directional Control / Active Test】D1 Lite obd2 scanner has bidirectional control(worth $300+), which is the most beloved feature among mechanic. If your headlights or car windows are broken, going to a repair shop will cost a lot of money. You can use D1 Lite to send execution commands to the ECU module and identify the repair status. Such as ABS, car windows, doors, valves, wipers, headlights, etc., effectively shorten diagnostic time and reduce diagnostic costs.
- 🔥【All Systems Diagnostics, In-depth Checking】This advanced OBD2 Scanner D1 Lite can perform OE-level diagnosis of all systems including engine, transmission, airbag, ABS, ESP, TPMS, gateway, steering, radio, and air conditioning for more than 100 brands. This diagnostic scanner supports essential functions, such as reading ECU version info, reading and clearing fault codes, and reading data streams.With just a simple click, it provides you with accurate and in-depth diagnostics.
- 🏆【38+ Reset Hot Functions】For repair workshops, holding an OTOFIX D1 Lite Auto scanner is a strong advantage over others. Its 38+ maintenance functions provide various solutions for all module repairs, including Oil Reset, TPMS Reset, Injector Coding, Suspension, Throttle Matching, etc., which will usher your repair business to a new pinnacle. Continuously updating will never make the functionality & compatibility out-of-date.
- 🏆【150+ Models, 10000+ Car Coverage & 16 Languages】D1 Lite is a comprehensive car diagnostic scan tool, help you to troubleshoot car issues fast for 95% US, European, Asian auto makes. ✅ With frequent updates and optimizations allow D1 Lite to cover more vehicles to meet your needs. ✅ Multilingual menu allows auto mechanics around the world to use it without language barriers. 🚩Note: Kindly send us the S/N of the device to authorize new language updates before changing the menu language.
- 2026 Newest Wireless Bluetooth Scan Tool D1: OTOFIX D1 Diagnostic scanner is upgraded version with Enhanced Hardwares & Newest Functions, FASTER and SMARTER! ✅Alternative Bluetooth 5.0 +USB connect✅2G+64GB✅Android 9.0 OS✅5G & 2.4 GHz Dual WiFi✅5800mAh battery👍VAG Guided Function👍ECU Online Coding👍CANFD&DOIP👍40+ Services👍Bi-Directional Control👍Full Systems Diagnose👍2 Years Free Update👍150+ Vehicle Coverage🎁Contact to get gift: otofixaftersales-amz@ outlook.com
- ECU Coding to Unlock the Hidden Features: OTOFIX D1 obd2 scanner diagnostic tool newly adds ECU Coding which can Online Coding(ONLY for VW/Au.di/Sk0da), Variant Coding/Offline Programming, Flash Hidden Functions, Reset Adaptive Data, Match Replaced Components, Customize OE-Settings. Such as: halogen fog lamps retrofitted with xenon fog lamps, different capacity battery retrofit, disbale auto start-stop, sunroof initialization, injector calibration, etc. PS: Coding functions vary by model&year.
- Full Bidirectional Control for Active Car Tests: The D1 OTOFIX scanner also offers bi-directional control, allowing you to perform powerful active tests on car subsystems. This means that you can check the working status and functionality of open & close solenoids, energize injectors, turn cooling fan on & off, and more, all from the device itself.🚩The D1 bi-directional obd2 scanner can quickly help you to check if a system or component goes well,Improving 200% Efficiency.**Note that Active Tests available depend on the make/model/year of your car.
- 40+ Popular Maintenance Functions: OTOFIX D1 obd scanner for car performs 40+ hot services, including Oil Reset, EPB, TPMS, BMS, E.GR, G.PF, D.PF, SAS Calibration, ABS Bleeding, Injector Coding, Gearbox Match, Suspension, Crankshaft Relearn, Power Balance, etc., still growing. Great choice for DIYers, technician, repair shop. 🚩Get MORE special functions from "Car Brand>System>Service". Check compatibility before purchase via 📧 otofixaftersales-amz@ outlook.com.
- OE-Level All Systems Diagnostic + One-Click AutoVIN & AutoSCAN: OTOFIX D1 scanner automotriz gives you the ability to troubleshoot entire car systems including engion system,transmission system,body system,chassis,etc. 🚩One of the standout features of the D1 obd2 scanner diagnostic tool is the one-click AutoVIN & AutoScan function. This feature allows you to quickly and easily scan all diagnosable ECUs with just one click, and identify any problems hidden in your vehicle's systems.
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.