|
Your Cadillac is equipped with a very good on-board diagnostic system capable of reading out the stored trouble codes. Contained here is information and instructions for entering the onboard self-diagnostic mode.
The dash mounted "CHECK ENGINE" light (also called "SERVICE ENGINE SOON" (SES) or "MALFUNCTION INDICATOR LAMP" (MIL) on some model years) is used to inform the technician of detected system malfunctions or abnormalities. When the check engine light turns on, it indicates that a malfunction has occurred for which a trouble code has been set. The trouble code can be retreived with either the on-board diagnostic display, or on some model years, through the use of a Tech-2 scan tool. The malfunction may or may not result in abnormal engine operation. The light goes out automatically once the required repairs are made or if the fault clears itself (intermittent). However, the computer stores the trouble code(s) associated with the detected failure until the diagnostic system, is "Cleared" or until 20 (or 50) ignition switch (on-off) cycles have occurred without the fault reappearing. Proper operation of the light is as follows: The dash mounted digital display panel, either the Electronic Climate Control (ECC) or Driver's Information Center (DIC), can be temporarily directed to display trouble codes stored in the onboard computer.
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: HOW TO "CLEAR" TROUBLE CODESTrouble codes stored in the ECM's memory may be cleared (erased) by entering the diagnostic mode and then depressing the "OFF" and "HI" button simultaneously. Hold until "00" appears. After "00" is displayed the ECM will display "70". HOW TO "EXIT" DIAGNOSTIC MODETo get out of the diagnostic mode, depress any of the ECC "function" keys (Auto, Econ, etc. except Rear Defog) or turn ignition switch off for 10 seconds. Trouble codes are not erased when this is done. The temperature setting will reappear in the display panel.
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: After entering On-Board Diagnostics, a segment check is automatically performed and then any trouble code stored in computer memory will be displayed. Codes may be stored for the Powertrain Control Module (PCM), Instrument Panel Cluster (IPC), Air Conditioning Programer (ACP), Supplemental Inflatable Restraint (SIR) Traction Control System (TCS) or Road Sensing Suspension (RSS) systems. Each trouble code consists of the system abbreviation: (P: Powertrain, PCM), (E: Engine, ECM), (I: Instrument Panel Cluster , IPC), (A: Air Conditioning, ACP), (R: Supplemental Inflatable Restraint - Air Bags, SIR), (T: Traction Control - Anit-Lock Brakes, TCS), (S: Road Sensing Suspension, RSS), a three digit code identifier, and the letter C or H. All codes for each system are displayed together, in the order of their three digit number (lowest first). The final digit of the code, a "C" or "H" is used to indicate whether the code is Current or History. A "C" means the fault was still present the last time the diagnostic test was run, while "H" means the failure was not present the last time the code was tested for. If no codes are present for a system, a "NO X CODE" message (with "X" being the system i.e. E, I, A, R, T or S) will be displayed. If the communication line to a component is not operating, a "NO X DATA" message will be displayed, indicating that the IPC could not communicate with that system. HOW TO "CLEAR" TROUBLE CODESSelection of "CLEAR CODES?" test will result in the message "CODES CLEARED" being displayed along with the selected systems name. This message will appear for 3 seconds and then return to the next available test type. HOW TO "EXIT" DIAGNOSTIC MODETo get out of the diagnostic mode anytime during the test, depress the "AUTO" or "DEFOG" button, or turn the ignition switch "OFF." Trouble codes are not erased if this is done prior to selecting "CODES CLEARED."
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: Pointers 00-04 contain the stored trouble codes. HOW TO "CLEAR" TROUBLE CODESA code can be cleared by press the "OFF" button while that particular code is displayed. To get out of the diagnostic mode, depress any of the "ECON" or "DEFOG" buttons, or turn ignition switch off for 10 seconds. Trouble codes are not erased when this is done. The temperature setting will reappear in the display panel.
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: After the segment display test, the driver message center displays all set DTC, current and history, in the following order: The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display. On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system. HOW TO "EXIT" DIAGNOSTIC MODETo exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF."
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: All the dashboard lights will illuminate, including the segments of the DIC display. You are then presented with text. You can cycle through different questions using the UP and DOWN arrows on the info button. HOW TO "EXIT" DIAGNOSTIC MODETo exit the diagnostic mode anytime during the test turn the ignition switch "OFF."
Using the 3 indicators on the rear parking assist display the system is capable of displaying diagnostic trouble codes. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the Ultrasonic Read Parking Assist (URPA) system under this condition.
HOW TO "ENTER" DIAGNOSTIC MODETo enter diagnostic mode, proceed as follows: When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Diagnostic Indicators State/Fault Location Amber Outside Amber Middle Red Outside Start of Diagnostics ON OFF ON RR Corner Object Sensor and Wiring ON OFF OFF RR Middle Object Sensor and Wiring ON ON OFF LR Middle Object Sensor and Wiring OFF ON ON LR Corner Object Sensor and Wiring OFF OFF ON Chime Warning Wiring OFF ON OFF Reverse Input Wiring OFF FLASHES OFF Sensor Supply Voltage Circuit and FLASHES FLASHES FLASHES Sensor Low Reference Circuit HOW TO "CLEAR" TROUBLE CODESThe rear parking assist diagnostic sequences may be cleared in one of the following ways:
The sequences will not clear if the rear parking assist diagnostic connector is grounded.
The Official eGroups Cadillac Owners mailing list is an automatically maintained email mailing list and archive dedicated to the distribution of general information, questions, inquiries about new Cadillac Motor Cars and related topics. Here you'll find owner comments and critiques, articles showing how owners maximize performance, stories of unique owner experiences and news of accessories, recalls, service bulletins, links to other valuable websites and other important information. Whether you presently own a Cadillac or are looking to purchase one this list is for you! Alternatively, you can send a blank email message to cadillacowners-subscribe@egroups.com Consider this mailing list a real-time supplement to the Cadillac Vision Magazine every new Cadillac owner receives.
|