For a complete wiring diagram Refer to Section 8W.When Monitored:Continuously.Set Condition:When the Totally Integrated Power Module (TIPM) detects a HIGH condition.Possible CausesCHECK (Z910) GROUND CIRCUIT(Z910) GROUND CIRCUIT OPENCHECK (L53) LEFT STOP LAMP CONTROL CIRCUIT(L53) LEFT STOP LAMP CONTROL CIRCUIT OPEN(L53) LEFT STOP LAMP CONTROL CIRCUIT SHORTED TO VOLTAGELEFT STOP LAMP BULBTOTALLY INTEGRATED POWER MODULE1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.With the scan tool, clear all DTC'sTurn the Stop Lamps on.With the scan tool, read DTC's.Does the scan tool display active: B16B1–LEFT STOP LAMP CONTROL CIRCUIT HIGH?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 - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 2. CHECK (Z910) GROUND CIRCUITSTurn the ignition off.Disconnect the Left Rear Tail Lamp harness connector.With a 12–volt test light connected to 12–volts, probe each (Z910) Ground circuit.Does the test light illuminate brightly on each ground circuit?YesGo To 4NoGo To 33. (Z910) GROUND CIRCUIT OPENMeasure the resistance of the appropriate (Z910) Ground circuit(s) at the Left Rear Tail Lamp assembly harness connector.Is the resistance below 10.0 ohms?YesReplace the Inoperative bulb in accordance with the Service Information.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoRepair the appropriate (Z910) Ground circuit(s) for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 4. CHECK (L53) LEFT STOP LAMP CONTROL CIRCUITTurn the ignition on.With the Stop Lamps still on and a 12–volt test light connected to ground, check the (L53) Left Stop Lamp Control circuit.Does the test light illuminate brightly?YesReplace the Inoperative bulb in accordance with the Service Information.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoGo To 55. (L53) LEFT STOP LAMP CONTROL CIRCUIT OPENDisconnect the TIPM C7 harness connector.Measure the resistance of the (L53) Left Rear Turn Signal Control circuit between the Left Rear Tail Lamp harness connector and the TIPM C7 harness connector.Is the resistance below 10.0 ohms?Yes Go To 6No Repair the (L53) Turn Signal Control circuit for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 6. (L53) LEFT STOP LAMP CONTROL CIRCUIT SHORTED TO VOLTAGETurn the ignition on.Measure for voltage on the (L53) Left Stop Lamp Control circuit.Is there any voltage present?YesRepair the (L53) Left Stop Lamp Control circuit for a short to voltage.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)