Additions, Revisions, or Updates

1 12 05-16 SUBJECT SPN 636 (MCM) (GHG17) SPN 636 (MCM) (EPA07;EPA10;GHG14) SPN 636 (MCM) (GHG14) DATE December 2016 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0191 GHG17 Heavy Duty SPN 636/FMI 2 - GHG17 SPN 636/FMI 15 - GHG17 DDC-SVC-MAN-0084 EPA07/10/ GHG14 Heavy Duty SPN 636/FMI 2 - EPA07 - EPA10 - GHG14 SPN 636/FMI 15 - GHG14 Updated HD 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. 3

2 SPN 636/FMI 2 - GHG17 2 SPN 636/FMI 2 - GHG17 No Match of Camshaft and Crankshaft Signals Table 1. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 636/FMI 2 This Code Will Set When There is a Camshaft and a Crankshaft Mismatch Signal Camshaft/Crankshaft Sensors Engine Idle Continuous When Enabling Conditions Met 10 Seconds MIL, CEL Engine Idle (One minute) Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. Check as follows: 1. Are there any other camshaft (SPN 723/FMI Any) or crankshaft (SPN 636/FMI 3, 8, 10, or 11) faults active? a. Yes, repair circuit failure first. If the problem is still present after circuit repair, Go to step 2. b. No, Go to step 2. 2. Has the engine been recently overhauled or had valve train maintenance? a. Yes, verify proper camshaft timing and gear lash adjustment. Refer to section "Camshaft Timing Verification". Refer to section "Checking and Adjusting Gear Lash with Camshaft Housing Removed". b. No, Go to step 3. 3. Remove the Camshaft Position (CMP) sensor and inspect for damage. Refer to section "Removal of the Camshaft Position Sensor". Is there damage to the sensor? a. Yes; Go to step 4. 4 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION 12 05-16

4. Inspect the tone wheel on the intake camshaft for damage. Check gear train for excessive lash or damage. Is damage present? a. Yes; repair as necessary, and replace the camshaft position sensor. After replacing the CMP sensor, verify the repair and Go to step 5. 5. Connect to DiagnosticLink and check for codes. Is SPN 636/FMI 2 active? a. Yes; replace the camshaft. Refer to section "Removal of the Camshafts". b. No; repair is complete. All information subject to change without notice. 5

3 SPN 636/FMI 15 - GHG17 3 SPN 636/FMI 15 - GHG17 No Match of Camshaft and Crankshaft Signals Table 2. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 636/FMI 15 This Code Will Set When a Mismatch Signal Between the Camshaft and the Crankshaft is Detected Camshaft/Crankshaft Sensors Engine Idle Continuous When Enabling Conditions Met 10 Seconds MIL Engine Idle (One Minute) Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. Check as follows: 1. Are there any other camshaft (SPN 723/FMI Any) or crankshaft (SPN 636/FMI 3, 8, 10, or 11) faults active? a. Yes; repair circuit failure first. If the problem is still present after circuit repair, Go to step 2. b. No; Go to step 2. 2. Has the engine been recently overhauled or had valve train maintenance? a. Yes; verify proper camshaft timing and gear lash adjustment. Refer to section "Camshaft Timing Verification". Refer to section "Checking and Adjusting Gear Lash with Camshaft Housing Removed". b. No; Go to step 3. 3. Remove the Camshaft Position (CMP) sensor and inspect for damage. Refer to section "Removal of the Camshaft Position Sensor". Is there damage to the sensor? a. Yes; Go to step 4. 6 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION 12 05-16

4. Inspect the tone wheel on the intake camshaft for damage. Check gear train for excessive lash or damage. Is damage present? a. Yes; repair as necessary, and replace the camshaft position sensor. After replacing the CMP sensor, verify the repair. Go to step 5. 5. Connect to DiagnosticLink and check for codes. Is SPN 636/FMI 15 active? a. Yes; replace the camshaft. Refer to section "Removal of the Camshafts". b. No; repair is complete. All information subject to change without notice. 7

4 SPN 636/FMI 2 - EPA07 - EPA10 - GHG14 4 SPN 636/FMI 2 - EPA07 - EPA10 - GHG14 No Match of Camshaft and Crankshaft Signals Table 3. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 636/FMI 2 This Code Will Set When There is a Camshaft and a Crankshaft Mismatch Signal Camshaft/Crankshaft Sensors Engine Idle Continuous When Enabling Conditions Met 10 Seconds MIL, CEL Engine Idle (One Minute) Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. Check as follows: 1. Are there any other camshaft (SPN 723/FMI Any) or crankshaft (SPN 636/FMI 3, 8, 10, or 11) faults active? a. Yes; repair circuit failure first. If the problem is still present after circuit repair, Go to step 2. b. No, Go to step 2. 2. Has the engine been recently overhauled or had valve train maintenance? a. Yes, verify proper camshaft timing and gear lash adjustment. Refer to section "Camshaft Timing Verification". Refer to section "Checking and Adjusting Gear Lash with Camshaft Housing Removed". b. No, Go to step 3. 3. Remove the Camshaft Position (CMP) sensor and inspect for damage. Refer to section "Removal of the Camshaft Position Sensor". Is there damage to the sensor? a. Yes; Go to step 4. 8 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION 12 05-16

5 SPN 636/FMI 15 - GHG14 5 SPN 636/FMI 15 - GHG14 No Match of Camshaft and Crankshaft Signals Table 4. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 636/FMI 15 This Code Will Set When a Mismatch Signal Between the Camshaft and the Crankshaft is Detected Camshaft/Crankshaft Sensors Engine Idle Continuous When Enabling Conditions Met 10 Seconds MIL, CEL Engine Idle (One Minute) Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. Check as follows: 1. Are there any other camshaft (SPN 723/FMI Any) or crankshaft (SPN 636/FMI 3, 8, 10, or 11) faults active? a. Yes; repair circuit failure first. If the problem is still present after circuit repair, Go to step 2. b. No, Go to step 2. 2. Has the engine been recently overhauled or had valve train maintenance? a. Yes, verify proper camshaft timing and gear lash adjustment. Refer to section "Camshaft Timing Verification". Refer to section "Checking and Adjusting Gear Lash with Camshaft Housing Removed". b. No, Go to step 3. 3. Remove the Camshaft Position (CMP) sensor and inspect for damage. Refer to section "Removal of the Camshaft Position Sensor". Is there damage to the sensor? a. Yes; Go to step 4. 10 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION 12 05-16

4. Inspect the tone wheel on the intake camshaft for damage. Check gear train for excessive lash or damage. Is damage present? a. Yes; repair as necessary, and replace the camshaft position sensor. After replacing the CMP sensor, verify the repair. Go to step 5. b. No; replace the camshaft position sensor. Refer to section "Removal of the Camshaft Position Sensor". After 5. Connect to DiagnosticLink and check for codes. Is SPN 636/FMI 15 active? a. Yes; replace the camshaft. Refer to section "Removal of the Camshafts" b. No; repair is complete. All information subject to change without notice. 11