U0106-LOST COMMUNICATION WITH GLOW PLUG CONTROL MODULEFor a complete wiring diagram Refer to Section 8WWhen Monitored:Continuously while the system is active.Set Condition:The ECM isn't receiving a LIN bus message from the Glow Plug Control Module.
Possible CausesINTERMITTENT DTC(D509) LIN BUS CIRCUIT OPEN OR HIGH RESISTANCEGLOW PLUG CONTROL MODULEENGINE CONTROL MODULE (ECM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)Diagnostic Test1.DTC IS ACTIVETurn the ignition on.With a scan tool, View DTCs.Record all DTC information.If DTC U1008 LIN 1 BUS is active in addition to this DTC, perform the diagnostic procedure for that DTC before continuing with this test.If DTC U1132 GENERATOR COMMUNICATION is active or stored in addition to this DTC, proceed with this diagnostic procedure.With a scan tool, Clear DTCs.Start the engine and allow it to reach normal operating temperature.Monitor the scan tool for at least 2 minutes.With a scan tool, View DTCs.Is the status Active for this DTC?YesGo To 2NoRefer to the INTERMITTENT CONDITION Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING)2.U1132 GENERATOR COMMUNICATION DTC IS PRESENTWith a scan tool, View DTCs.Is DTC U1132 GENERATOR COMMUNICATION Active in addition to this DTC?YesGo To 3NoGo To 43.(D509) LIN BUS CIRCUIT OPEN OR HIGH RESISTANCETurn the ignition off.Disconnect the Generator harness connector.Disconnect the Glow Plug Module harness connector.Disconnect the Engine Control Module (ECM) harness connector.Measure the resistance of the (D509) LIN Bus circuit between the Generator harness connector and the Engine Control Module (ECM) harness connector.Measure the resistance of the (D509) LIN Bus circuit between the Glow Plug Module harness connector and the Engine Control Module (ECM) harness connector.Is the resistance below 10 ohms for both measurements?YesGo To 6NoRepair the (D509) LIN Bus for an open circuit or high resistance.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)4.(D509) LIN BUS CIRCUIT OPEN OR HIGH RESISTANCETurn the ignition off.Disconnect the Glow Plug Module harness connector.Disconnect the Engine Control Module (ECM) harness connector.Measure the resistance of the (D509) LIN Bus circuit between the Generator harness connector and the Engine Control Module (ECM) harness connector.Is the resistance below 10 ohms?YesGo To 5NoRepair the (D509) LIN Bus for an open circuit or high resistance.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)5.GLOW PLUG CONTROL MODULEIgnition off, engine not running.Connect the Engine Control Module (ECM) harness connector.Replace the Glow Plug Module in accordance with the Service Information.Turn the ignition on.With a scan tool, Clear DTCs.Start the engine and allow it to reach normal operating temperature.Monitor the scan tool for at least 2 minutes.With a scan tool, View DTCs.Is the status Active for this DTC?YesGo to 6NoTest Complete.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)6.ENGINE CONTROL MODULE (ECM)Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the Engine Control Module (ECM).Look for any chafed, pierced, pinched, or partially broken wires.Look for broken, bent, pushed out or corroded terminals.Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.Look for the data to change or for the DTC to reset during the wiggle test.Refer to any Technical Service Bulletins that may apply.Were any problems found?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace the Engine Control Module (ECM) in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)