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PACCAR PX-8 CM2150 (2007-09) Fault Code: 1117 PID: SID 251 SPN: 627 FMI: 2 Power Supply Lost With Ignition On – Data Erratic, Intermittent, or Incorrect.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.
This fault is set active if the ECM battery supply voltage drops below +6.2-VDC while the keyswitch is in the ON position.
Make sure the ECM unswitched battery supply is coming directly from the battery and not the starter. If unswitched power is coming from the starter, it is possible for the battery voltage to drop low enough during cranking to set this fault active.
Where the fault code is inactive, familiarize yourself with the vehicle shutdown practices used by the operator. For example, if there are controls inside the cab that can interrupt the (ECM) power supply (before the end of the 30 second power down process after key OFF), these should be considered as a potential cause when the fault code is being addressed. This should be explained to the operator.
This fault can also be caused by resistance in the ECM battery supply (+) or (-) circuits. Resistance in these circuits can cause the voltage level at the ECM input to drop low enough to set Fault Code 1117 active.
An active Fault Code 1117 can prevent critical aftertreatment soot load information from being saved to permanent memory in the ECM. The use of battery disconnect switches to turn the engine off or any device that disconnects battery voltage to the ECM within 10 seconds of turning the keyswitch OFF can cause damage to the aftertreatment system. Donot operate the vehicle with an active Fault Code 1117.
Possible repairs:
1)Tighten the loose connections and clean the terminals.
2)Charge or replace the battery.
3)Flush the dirt, debris, or moisture from the connector pins.
4)Install the appropriate connector seal if it is damaged or missing.
5)Repair the engine harness.
6)Replace the ECM.
7)Replace the OEM harness
8)Replace the blown fuse(s).
9)Repair or replace the OEM power harness from the OEM power connector to the batteries.
10)Repair or replace the ECM power harness
PACCAR PX-8 CM2150 (2007-09) Fault Code: 784 PID: SID 145 SPN: 1590 FMI: 2 Adaptive Cruise Control Mode – Data Erratic, Intermittent, or Incorrect. Loss of communication with adaptive cruise control.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 779 PID: SID 051 SPN: 703 FMI: 11 Auxiliary Equipment Sensor Input 3 – Root Cause Not Known
PACCAR PX-8 CM2150 (2007-09) Fault Code: 778 PID: SID 064 SPN: 723 FMI: 2 Engine Camshaft Speed/Position – Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in the camshaft position sensor signal.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 731 PID: SID 064 SPN: 723 FMI: 7 Engine Speed/Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding Properly or Out of Adjustment. Engine position signal from the engine speed sensor and camshaft position sensor do not match.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 698 PID: 21 SPN: 1136 FMI: 4 ECM Internal Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage or an open circuit detected at the internal ECM temperature sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 692 PID: 692 SPN: 1172 FMI: 4 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the turbocharger compressor inlet air temperature sensor circuit.