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Entering & Exiting Diagnostics

NOTE: If vehicle is to be operated in diagnostics without engine running for an extended time period, use battery charger to prevent battery from running down or system setting false diagnostic information.

Climate Control Panel (CCP) is used to display Body Control Module (BCM) information while in diagnostic mode. CCP displays Diagnostic Trouble Codes (DTCs) for Powertrain Control Module (PCM), Instrument Panel Cluster (IPC), Air Control Module (ACM), Supplemental Inflatable Restraint (SIR), Traction Control System (TCS), Road Sens-ing Suspension (RSS), Body Control Module (BCM), Integrated Radio Controller (IRC), Remote Function Actuator (RFA), Climate Control Panel (CCP), and Cellular Telephone (PHN).

  1. To enter diagnostic mode, turn ignition on. Simultaneously press OFF and WARMER (red bar) buttons on climate control center (digital instrument panel), or OFF and PASSENGER WARMER on climate control panel (analog instrument panel). Continue pressing appropriate buttons until segment check appears (about 3 seconds) on Instrument Panel Control (IPC).
    NOTE: Failure of any segment to glow may result in inaccurate test results (turn signal indicators should not be lit). Replace any inoperative segment display before proceeding with self-diagnostic process.
  2. When segment check appears (all segments glow), system has entered diagnostic mode. Release both buttons. Driver Information Center (DIC) portion of IPC will display Diagnostic Trouble Codes (DTCs). Diagnostic trouble codes will be displayed in levels beginning with PCM codes first, followed by IPC, ACM, SIR, TCS, RSS, PZM codes, etc. (if so prompted).
  3. To select PZM level, press and release CCP LO (fan down) button until PZM level is displayed. After codes are displayed, press CCP HI (fan up) button to enter service mode or press OFF button to return to next selection in previous test level. To continue with system diagnostics, see SERVICE MODE OPERATION  .
  4. To exit diagnostic mode, press DEFOG or MODE button on CCP, or turn ignition off. Codes will not be cleared. System will return to normal vehicle operation.
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