FMI 5 SPN 3361 / 2012 Cascadia...Need help diagnosing the problem / CEL MIL lights

on the road for another 4-5 weeks ? you are not an owner-operator?
or bad def metering unit or bad harness
Diesel Exhaust Fluid Dosing Valve Circuit Failed Open


SPN 3361/FMI 5
Description Diesel Exhaust Fluid (DEF) Dosing Valve Circuit Failed Open
Monitored Parameter DEF Dosing Valve
Typical Enabling Conditions Always Enabled
Monitor Sequence None
Execution Frequency Always Enabled
Typical Duration 2 Seconds
Dash Lamps MIL, CEL
Engine Reaction Derate 25%
Verification Engine Idle (1 minute)
Check as follows:

1. 
   Show/Hide Checkboxes
2. Check for multiple codes.
   1. If SPN 4353/FMI 5 is active confirmed along with SPN 3361/FMI 5, repair the open circuit between pin 3 of the ACM 120-pin connector and the DEF metering unit dosing valve connector for pin 2.
   2. If only SPN 3361/FMI 5 is present, Go to step 2.
3. Disconnect the DEF dosing valve wiring harness connector.
4. Inspect the dosing valve connector terminals for spread or corroded pins.
   1. If the pins are spread or corroded, repair as necessary.
   2. If connector shows no signs of damage, Go to step 4.
5. Turn the ignition ON (key ON, engine OFF).
6. Measure the voltage between pin 2 on the harness side of the DEF dosing valve connector and ground.
7. Is the voltage within 1 volt of battery voltage?
   1. Yes; Go to step 7.
   2. No; repair the wire between pin 2 on the harness side of the DEF dosing valve and pin 3 of the Aftertreatment Control Module (ACM) 120-pin connector.
8. Measure resistance across pin 1 and pin 2 of the DEF dosing valve.
9. Is the resistance between 13-16 ohms?
   1. Yes; repair the wire between pin 1 of the DEF dosing valve harness connector and pin 28 of the ACM 120-pin connector. Refer to section "Removal of the Diesel Exhaust Fluid Metering Unit" .
   2. No; replace the DEF metering unit.Refer to section "Installation of the Diesel Exhaust Fluid Metering Unit" .
10. Perform a DEF Dosing Quantity Test to verify repair.

Regulatory Fault Ignored - Derate On

For 2011 models, this code sets when the vehicle has been driven for 30 miles while a code is present for the DEF tank level, DEF metering valve, DEF pump, NOx sensors, Blocked DEF line, DEF quality, NOx efficiency, SCR harness and/or SCR sensor.

For 2010 models, this code sets when the vehicle has been driven for 10 hours or 500 miles while a code is present for the DEF tank level, DEF metering valve, DEF pump, NOx sensors, Blocked DEF line, DEF quality, NOx efficiency, SCR harness and/or SCR sensor.


SPN 5246/FMI 15
Description Regulatory Fault Ignored - Derate On.
Monitored Parameter SCR and DPF sensors
Typical Enabling Conditions Always enabled
Monitor Sequence None
Execution Frequency Always enabled
Typical Duration 2 seconds
Dash Lamps CEL
Engine Reaction 25 percent derate
Verification
Parked SCR efficiency test for extended SCR faults

High idle regeneration for DPF and NOx faults

Check as follows:

1. 
   Show/Hide Checkboxes
2. Connect DiagnosticLink® . Go to step 2.
3. Check for other emission-related fault codes. Are there any Selective Catalyst Reduction (SCR) or Diesel Particulate Filter (DPF) related fault codes present?
   1. Yes; diagnose and repair the emission-related fault codes first. Verify repair.
   2. No; perform the Selective Catalyst Reduction (SCR) efficiency test or high idle regeneration. Use DiagnosticLink to clear the code.

 

the harness starts from ACM(aftertreatment control module is located right behind of splash guard on driver side) and goes to onebox, def metering unit,....

 

it's located on battery box. facing to the front.

http://www.dtnaecomponents.com/Frei...DetroitDiesel/Images/ACMAtBatteryBoxLarge.bmp

 

BTW... @Emil Baran you should thank mhyn by clicking that "Thank" button on his post!