307-13

3 07-13
1
3 07-13
SUBJECT
DATE
SPN 652/FMI 14 - EPA07
March 2013
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
Change
DDC-SVC-MAN-0084
DD Platform
SPN 652/FMI 14 EPA07
In step 8 and 9a, changed refer to section to "Removal of the TwoPiece Fuel Injector Wiring Harness-Three-Filter System."
All information subject to change without notice.
3 07-13
Copyright © 2013 DETROIT DIESEL CORPORATION
3
2 SPN 652/FMI 14 - EPA07
2
SPN 652/FMI 14 - EPA07
This diagnostic is typically used for the Fuel Injector #2 Needle Control Valve abnormal operation.
1. Check for multiple codes.
a. If SPN fault code 168 or 723 / FMI any is present, service those faults first.
b. If SPN fault code 168 or 723 / FMI any is not present, Go to step 2.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
WARNING: PERSONAL INJURY
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.
2.
3.
4.
5.
Start and warm the engine until the coolant temperature is above 71°C (160°F).
Turn the ignition OFF (key OFF, engine OFF).
Disconnect the front fuel injector harness 14-pin connector.
Inspect the front injector harness 14-pin connector for bent or spread pins; inspect the connector seal for damage (signs
of water or oil intrusion).
a. If water or oil intrusion, bent or spread pins are found, repair as necessary.
b. If the connector shows no signs of damage, Go to step 6.
NOTE: DO NOT touch the metal ohmmeter leads with your hands when the measurements are made.
6. Using the appropriate chart below, measure and record the resistance values between the corresponding pins on the
valve cover side of the front injector harness listed below. Are the resistances within range?
4
All information subject to change without notice.
Copyright © 2013 DETROIT DIESEL CORPORATION 3 07-13
3 07-13
Table 1.
Front Fuel Injector Harness 14-Pin Connector Resistance Chart (Valve Cover Side)
Injector #1
Needle
Pins 1 and 2
Pins 1 and 8
Pin 2 and
ground
Pin 8 and
ground
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #2
Needle
Ω
Pins 1 and 3
Pins 1 and 9
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #3
Needle
Ω
Pin 3 and
ground
Ω
Ω
Pin 9 and
ground
Greater than
100kΩ*
Ω
Ω
Pins 1 and 4
Pins 1 and 12
Pin 4 and
ground
Pin 12 and
ground
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Ω
Ω
Ω
* = acceptable resistance
Table 2.
Front Fuel Injector Harness 14-Pin Connector Resistance Chart (Using J-48671-10 Injector Breakout Box)
Note: Ensure J-48671-10 ground strap is connected to cylinder head.
Injector #1
Needle
Pins 3 and 4
Pins 2 and 3
Pin 2 and
ground
Pin 3 and
ground
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #2
Needle
Ω
Ω
Pins 3 and 4
Pins 2 and 3
Pin 2 and
ground
Pin 3 and
ground
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #3
Needle
Ω
Ω
Ω
Ω
Pins 3 and 4
Pins 2 and 3
Pin 2 and
ground
Pin 3 and
ground
1.3 - 2.5Ω*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Ω
Ω
Ω
* = acceptable resistance
a. Yes; Go to step 10.
b. No; Go to step 7.
7. Remove the rocker cover. Refer to section "Removal of the Rocker Cover".
8. Remove the injector harness from the engine. Refer to section "Removal of the Two-Piece Fuel Injector Wiring
Harness - Three-Filter System".
NOTE: DO NOT touch the metal ohmmeter leads with your hands when the measurements are made.
9. Using the chart below, measure and record the resistance values between the injector pins listed below. Are the
resistances within range?
All information subject to change without notice.
3 07-13
Copyright © 2013 DETROIT DIESEL CORPORATION
5
2 SPN 652/FMI 14 - EPA07
Table 3.
Injector Needle Resistance Chart (Injector Harness must be removed from engine)
Injector #1
Needle
Pins 3 and 4
Pins 3 and 2
Pin 2 and
ground
Pin 3 and
ground
2.0Ω or less*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #2
Needle
Ω
Ω
Pins 3 and 2
Pin 2 and
ground
Pin 3 and
ground
2.0Ω or less*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Injector #3
Needle
Ω
Pins 3 and 4
Ω
Ω
Ω
Pins 3 and 4
Pins 3 and 2
Pin 2 and
ground
Pin 3 and
ground
2.0Ω or less*
Greater than
100kΩ*
Greater than
100kΩ*
Greater than
100kΩ*
Ω
Ω
Ω
Ω
* = acceptable resistance
a. Yes; replace the injector harness. Refer to section "Removal of the Two-Piece Fuel Injector Wiring Harness Three-Filter System".
b. No; replace the injector with the out-of-range resistance. Refer to section "Removal of the Fuel Injector - ThreeFilter System".
10. Disconnect the Motor Control Module (MCM) 120-pin connector.
NOTE: DO NOT touch the metal ohmmeter leads with your hands when the measurements are made.
11. Using the chart below, measure and record the resistance values between the engine side of the front valve cover 14-pin
connector and the MCM 120-pin connector. Are the resistances within range?
Table 4.
Engine Harness Injector Circuit Resistance Table
Front Engine Side
Valve Cover 14-pin
connector #
MCM 120-Pin Harness
Connector
1
25
Ω
1 and ground
Ω
2
26
Ω
2 and ground
Ω
3
22
Ω
3 and ground
Ω
4
24
Ω
4 and ground
Ω
Acceptable Resistance
1Ω or less
Front Engine Side
Valve Cover 14 pin
connector #
Acceptable Resistance
1KΩ or greater
a. Yes; Go to step 12.
b. No; repair the engine side harness.
NOTE: The use of extension harness J-49120 will ease installation of test MCM.
12. Install a test MCM.
13. Reconnect all connections and start engine. Bring to operating temperature of 71°C (160°F). Does fault become active?
a. Yes; retain log file of active fault and the measured resistance values recorded in this procedure and contact the
Customer Support Center at 800-445-1980 for further instructions.
b. No; replace the MCM. Refer to section "Removal of the Motor Control Module".
6
All information subject to change without notice.
Copyright © 2013 DETROIT DIESEL CORPORATION 3 07-13