For a complete wiring diagram Refer to Section 8W.When Monitored:With the Headlamp Washers activated.Set Condition:When the Totally Integrated Power Module (TIPM) detects an shorted low condition.Possible Causes(W28) HEADLAMP WASHER RELAY SUPPLY CIRCUIT OPEN(W20) HEADLAMP WASHER RELAY CONTROL CIRCUIT SHORT TO GROUNDHEADLAMP WASHER RELAYHEADLAMP WASHER MOTORTOTALLY INTEGRATED POWER MODULE1. INTERMITTENT CONDITIONTurn the ignition on.With the scan tool, clear all DTC's.Turn the Headlamp Washers on.With the scan tool read DTC's.Does the scan tool display this DTC as active?YesGo To 2NoThe condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.Perform the BODY VERIFICATION TEST-VER1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 2. (W28) HEADLAMP WASHER RELAY SUPPLY CIRCUIT OPENCheck all fuses and circuit breakers before proceeding with the diagnosis of this DTC.Turn the ignition off.Remove the Headlamp Washer relay.Turn the ignition on.Measure the voltage on the (W28) Headlamp Washer Relay Supply circuit at the Headlamp Washer relay.Is the voltage above 10.0 volts?YesGo To 3NoRepair the (W28) Headlamp Washer Relay Supply circuit for an open.Perform the BODY VERIFICATION TEST — VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 3. HEADLAMP WASHER RELAYTurn the ignition off.Replace the Headlamp Washer relay with a known good relay.Turn the ignition on.With the Scan Tool, clear all DTC's.Activate the Headlamp Washers.With the Scan Tool, read the DTC's.Does the scan tool display this DTC as active?YesGo To 4NoReplace the Headlamp Washer relay in accordance with the Service Information.Perform the BODY VERIFICATION TEST — VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 4. (W20) HEADLAMP WASHER RELAY CONTROL CIRCUIT SHORT TO GROUNDTurn the ignition off.Disconnect the TIPM C3 Connector.Measure the resistance to ground of the (W20) Headlamp Washer Relay Control circuit.Is the resistance below 5.0 ohms?YesRepair the (W20) Headlamp Washer Relay Control circuit for a short to ground.Perform the BODY VERIFICATION TEST — VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoReplace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.Perform the BODY VERIFICATION TEST — VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)