Diagnostic Test

VERIFY DTC IS ACTIVE
NOTE: Diagnose all CAN B and C communication failures before continuing.
1. Ignition on, engine not running.
2. Using a scan tool, read ACC DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors, pay particulate attention the CAN circuits.
  - Perform ADAPTIVE CRUISE CONTROL VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Adaptive Cruise Control (ACC) - Standard Procedure .
VERIFY SCM IS ACTIVE ON CAN C BUS
1. Using a scan tool, select ECU View.
2. Verify that the SCM is active on the bus.
  Is the SCM active on the bus?
  
  Yes
  - Go to step 3
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the No Response from SCM diagnostic procedure.
CHECK FOR ACTIVE OR STORED DTCs IN SCM
1. Using a scan tool, read SCM DTCs.
  Are any DTCs active or stored in the SCM?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Steering Control (SCM) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - Go to step 4
CHECK FOR ACTIVE OR STORED COMMUNICATION DTCs IN TIPM
1. Using a scan tool, read TIPM DTCs.
  Are any active or stored SCM Communication DTCs set in the TIPM?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - Go to step 5
CHECK FOR STUCK SPEED CONTROL SWITCH (CRUISE CONTROL STALK)
NOTE: There is a possibility that the Speed Control Switch has internal damages causing a jammed signal to be sent to both the Steering Control Module (SCM) and Adaptive Cruise Control (ACC) module. Using a scan tool, read the Speed Control Switch Inputs to the SCM to verify if a stuck switch condition exits.
1. Using a scan tool, select Data Display in SCM and then select Cruise Control Status and Cruise Control from the Inputs Menu.
2. The Cruise Control input Status changes when the Cruise Stalk On/Off button is pressed and released. Normally, the status should read Set when the button is pressed and Not Set when the button is not pressed. Operate the switch. If the input status does not correspond to the switch position as specified, the switch is jammed.
3. The Cruise Control Status input status changes for each Cruise Stalk function position. Normally, the status should read None (when not moved), Cancel (when in CANCEL position), Set (when in DISTANCE position), Acc/Res (when in ACCEL/RESUME position), and Coast (when in DECEL/SET position). Operate the switch in each position. If the input status does not correspond to the switch position as specified, the switch is jammed.
  Does the input status correspond to the switch position as specified?
  
  Yes
  - Replace and program the ACC Module in accordance with the Service Information.
  - Perform ADAPTIVE CRUISE CONTROL VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Adaptive Cruise Control (ACC) - Standard Procedure .
  No
  - Replace the Speed Control Switch in accordance with the Service Information.
  - Perform ADAPTIVE CRUISE CONTROL VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Adaptive Cruise Control (ACC) - Standard Procedure .