Part - 4

OPERATION

NO BUS INDICATOR

The no-bus indicator gives an indication to the vehicle operator when the electronic communication data bus is ineffective. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages not being received over the CAN data bus from the Totally Integrated Power Module (TIPM).

The no-bus indicator function of the odometer display unit is completely controlled by the instrument cluster logic circuit. This logic only allows the indicator to operate when the instrument cluster receives a battery current input on the fused ignition output (run-start) circuit. Therefore, the odometer display no-bus indicator is always off when the ignition switch status is anything except ON or START. The instrument cluster turns ON the no bus indicator for the following reasons:

- No Electronic Communication Messages - Each time the ignition switch status transitions to ON and the cluster does not receive electronic communication messages over the CAN data bus, the no-bus indicator illuminates. The indicator remains illuminated until CAN bus communication is restored or until the ignition switch status transitions to OFF, whichever occurs first.

The CCN continually monitors the CAN data bus to determine the status of many sensors and systems throughout the vehicle. If bus communication is interrupted, the CCN cannot provide accurate displays and outputs.

Use a diagnostic scan tool is required for proper diagnosis of the no-bus indicator, the CCN, the CAN data bus or the electronic communication related to no-bus indicator operation. Refer to the appropriate diagnostic information.

NO FUSE INDICATOR

The no fuse indicator gives an indication to the vehicle operator when the Ignition Off Draw (IOD) fuse is ineffective or is not installed. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the CAN data bus from the Totally Integrated Power Module (TIPM).

The no fuse indicator function of the odometer display unit is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition output (run-start) circuit. Therefore, the no fuse indication will always be OFF when the ignition switch status is anything except ON or START. The instrument cluster will turn ON the no fuse indicator for the following reasons:

- No Fuse Indicator Lamp-On Message - Each time the ignition switch status transitions to ON and the cluster receives an electronic no fuse indicator lamp-ON message from the TIPM indicating that the IOD fuse is missing or ineffective, the no fuse indicator will be illuminated. The indicator remains illuminated for about three seconds, until the IOD fuse is installed, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch status transitions to OFF, whichever occurs first.

The TIPM continually monitors the IOD circuit to determine the status of the IOD fuse, then sends the proper lamp-ON or lamp-OFF message to the CCN over the CAN data bus.

For proper diagnosis of the no fuse indicator, the TIPM, the CCN, the CAN data bus or the electronic communication related to no fuse indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

PARK ASSIST DISABLED INDICATOR

The park assist disabled indicator gives an indication to the vehicle operator when the front and rear park assist systems have been manually disabled using the park assist switch found in the instrument panel lower switch pod. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the CAN data bus from the park assist module.

The park assist disabled indicator function of the electronic display unit is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition output (run-start) circuit. Therefore, the park assist disabled indication will always be OFF when the ignition switch status is anything except ON or START. The instrument cluster will turn ON the park assist disabled indicator for the following reasons:

- Park Assist Disabled Indicator Lamp-On Message - Each time the cluster receives an electronic park assist disabled indicator lamp-ON message from the park assist module indicating that the park assist system has been manually disabled, the park assist disabled textual warning is illuminated. The park assist disabled textual warning remains illuminated until the cluster receives a lamp-OFF message from the park assist module, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch status transitions to OFF, whichever occurs first.

The instrument cluster continually monitors the park assist switch in the instrument panel lower switch pod to determine the selected status of the park assist system. The cluster then sends the proper switch status message to the park assist module. After a switch status message is sent by the cluster, the park assist module enables or disables the system as appropriate then sends an electronic message back to the CCN to confirm the system status. The CCN then energizes or de-energizes the park assist disabled textual warning and the LED indicator in the park assist switch as appropriate.

For proper diagnosis of the park assist switch, the park assist module, the CCN, the CAN data bus or the electronic communication related to park assist disabled indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

POWER LIFTGATE INDICATOR

The power liftgate indicator gives an indication to the vehicle operator of the system status or when the system has been automatically disabled. This indicator is controlled by the CCN logic circuit based upon programming and electronic messages received over the CAN data bus from the Power Liftgate Module (PLGM).

The power liftgate indicator function of the electronic display unit is completely controlled by the instrument cluster logic circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, the power liftgate indications can be illuminated regardless of the ignition switch status. The instrument cluster will turn ON the power liftgate indicator for the following reasons:

- Unlock To Operate Message - Each time the CCN receives an electronic unlock to operate message from the PLGM, the UNLOCK TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Put In Park To Operate Message - Each time the CCN receives an electronic put in PARK to operate message from the PLGM, the PUT IN PARK TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Function Disabled Message - Each time the CCN receives an electronic function disabled message from the PLGM, the FUNCTION DISABLED textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Close Liftgate Glass Message - Each time the CCN receives an electronic close liftgate glass message from the PLGM, the CLOSE LIFTGLASS textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Obstacle Detected Message - Each time the CCN receives an electronic obstacle detected message from the PLGM, the OBSTACLE DETECTED textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Manually Close To Operate Message - Each time the CCN receives an electronic manually close to operate message from the PLGM, the MANUAL CLOSE TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.

The PLGM continually monitors the power liftgate inputs to determine the proper outputs to the power liftgate components. The PLGM then sends the proper lamp-ON or lamp-OFF message to the CCN.

For proper diagnosis of the power liftgate, the PLGM, the CCN, the CAN data bus or the electronic communication related to power liftgate indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

REMOTE START INDICATOR

The remote start indicator gives an indication to the vehicle operator of the system status. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the CAN data bus from the Totally Integrated Power Module (TIPM) and the Wireless Ignition Node (WIN).

The remote start indicator function of the electronic display unit is completely controlled by the instrument cluster logic circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, the remote start indications can be illuminated regardless of the ignition switch status. The instrument cluster will turn ON the remote start indicator for the following reasons:

- Remote Start Active Messages - Each time the IC receives an electronicremote start active message from the BCM, the REMOTE START ACTIVE - PUSH START BUTTON textual message is displayed. The message is displayed while the current remote start event remains active (about 15 minutes), until the IC arbitrator logic determines that another display request has priority, or until the ignition switch status transitions to ON, whichever occurs first.
- Remote Start Abort Messages - Each time the IC receives a combination of electronic remote start abort and door ajar, hood ajar, liftgate ajar or low fuel messages from the BCM the REMOTE START ABORTED and appropriate DOOR AJAR, HOOD AJAR, LIFTGATE AJAR or FUEL LOWtextual messages are displayed. The messages are displayed while the current remote start event remains active (about 15 minutes), until the IC arbitrator logic determines that another display request has priority, or until the ignition switch status transitions to ON, whichever occurs first.
- Remote Start Disabled Messages - Each time the IC receives an electronic remote start disabled message from the BCM the REMOTE START DISABLED - START VEHICLE TO RESET textual message is displayed. The message is displayed while the current remote start event remains active (about 15 minutes), until the IC arbitrator logic determines that another display request has priority, or until the ignition switch status transitions to START, whichever occurs first.

The TIPM continually monitors the remote start system inputs and the WIN to determine the proper outputs to the remote start components. The TIPM then sends the proper lamp-ON or lamp-OFF message to the CCN.

For proper diagnosis of the remote start system, the WIN, the TIPM, the CCN, the CAN data bus or the electronic communication related to remote start indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

SEAT BELT INDICATOR

The seatbelt indicator gives an indication to the vehicle operator of the status of the driver side front seat belt. This indicator is controlled by a transistor on the instrument cluster circuit board based upon cluster programming and a hard-wired input from the seatbelt switch in the driver side front seat belt buckle through the seat belt switch sense circuit.

The seatbelt indicator also includes a programmable enhanced seatbelt reminder or BELTMINDER feature that is enabled when the vehicle is shipped from the factory. This BELTMINDER feature can be disabled and enabled by the customer using a specific programming event sequence, or by the dealer using a diagnostic scan tool.

The seatbelt indicator LED is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition output (run-start) circuit. Therefore, the LED will always be OFF when the ignition switch status is anything except ON or START. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will turn ON the seatbelt indicator for the following reasons:

- Seatbelt Reminder Function - Each time the cluster receives a battery current input on the fused ignition output (run-start) circuit, the indicator will be illuminated as a seatbelt reminder for about six seconds, or until the ignition switch status transitions to OFF, whichever occurs first. This reminder function will occur regardless of the status of the seatbelt switch input to the cluster.
- Front Seatbelt Not Buckled - Beltminder Active - Following the seatbelt reminder function, each time the cluster detects an open circuit on either of the front seat belt switch sense circuit (seatbelt switch open = seatbelt unbuckled) while the ignition switch status is START or ON, the indicator will be illuminated. In addition, if the front seat belt remains unbuckled about 60 seconds after the conclusion of the seatbelt reminder function with the vehicle speed greater than about 8 kilometers-per-hour (5 miles-per-hour), the seatbelt indicator will begin to cycle between flashing ON and OFF for 3 seconds, then lighting solid for 2 seconds. The seatbelt indicator will continue to cycle between flashing and solid illumination for 13 complete cycles, until the seat belt switch sense inputs to the cluster are closed circuits to ground (seatbelt switch closed = seatbelt buckled), or until the ignition switch status transitions to OFF, whichever occurs first.
- Front Seatbelt Not Buckled - Beltminder Inactive - Following the seatbelt reminder function, each time the cluster detects an open circuit on the seat belt switch sense circuit (seatbelt switch open = seatbelt unbuckled) while the ignition switch status is START or ON, the indicator will be illuminated. The seatbelt indicator remains illuminated until the seat belt indicator driver input to the cluster is a closed circuit to ground (seatbelt switch closed = seatbelt buckled), or until the ignition switch status transitions to OFF, whichever occurs first.

The seatbelt switch is connected in series between ground and the seat belt switch sense circuit input to the CCN. The seatbelt switch input to the instrument cluster circuitry may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. For proper diagnosis of the CCN, the CAN data bus or the electronic communication related to seatbelt indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

SECURITY INDICATOR

The security indicator gives an indication to the vehicle operator when the Vehicle Theft Security System (VTSS) is arming or is armed. On vehicles equipped with the Sentry Key Immobilizer System (SKIS), the security indicator also gives an indication to the vehicle operator of the status of the SKIS. This indicator is controlled by a transistor on the instrument cluster circuit board based upon cluster programming, hard-wired inputs to the cluster from the various security system components, and electronic messages received by the cluster from the Wireless Ignition Node (WIN) over the CAN data bus. The CCN will illuminate the security indicator for about three seconds as a bulb test each time the ignition switch status transitions to ON.

The security indicator LED is completely controlled by the instrument cluster logic circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, the LED can be illuminated regardless of the ignition switch status. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. Depending upon the programmed condition the indicator can be illuminated solid, flashed at a slow rate (0.5 Hertz, 12.5 percent duty cycle), or flashed at a fast rate (1 Hertz, 50 percent duty cycle). The instrument cluster will turn ON the security indicator for the following reasons:

- VTSS Indication - During the 16 second VTSS arming function, the cluster will flash the security indicator ON and OFF repeatedly at a steady, fast rate to indicate that the VTSS is in the process of arming. Following successful VTSS arming, the cluster flashes the security indicator ON and OFF continuously at a slower rate to indicate that the VTSS is armed. The security indicator continues flashing at the slower rate until the VTSS is disarmed or triggered. If the VTSS has alarmed and rearmed, the cluster will flash the security indicator at a steady, slow rate for about 30 seconds after the VTSS is disarmed.
- SKIS Indicator Lamp-On Message - Each time the cluster receives an electronic SKIS indicator lamp-ON message from the WIN, the security indicator will be illuminated. The indicator can be flashed ON and OFF, or illuminated solid, as dictated by the WIN message. The indicator remains illuminated solid or continues to flash until the cluster receives a lamp-OFF message from the WIN, or until the ignition switch status transitions to OFF, whichever occurs first. For more information on the SKIS and the security indicator control parameters, Vehicle Theft Security System - Operation.
- SKIS Textual Message - When the WIN detects certain monitored conditions or is placed in the programming mode it will send electronic messages requesting the cluster display textual messages, and the appropriate textual message or combination of messages is illuminated in the cluster electronic display unit. PROGRAMMING ACTIVE, NEW KEY PROGRAMMED, REMOTE KEY BATTERY LOW, and SERVICE SECURITY KEY messages appear individually, while a KEY NOT PROGRAMMED message is followed by either a DAMAGED KEY, INVALID KEY or EXCEEDED KEY PROGRAM LIMIT message, and an INVALID KEY message is followed by a TRY ALTERNATE KEY message. The textual messages related to key programming are active only on vehicles sold in markets where customer programming is an available feature of the SKIS.
- Communication Error - If the cluster receives no lamp-ON or lamp-OFF messages from the WIN for 10 consecutive message cycles, the security indicator is illuminated by the instrument cluster. The indicator remains controlled and illuminated by the cluster until a valid lamp-ON or lamp-OFF message is received from the WIN.

The instrument cluster circuitry controls the security indicator whenever the ignition switch status is OFF and the VTSS is arming, armed, or alarming. Whenever the ignition switch status is ON or START, the WIN performs a self-test to decide whether the SKIS is in good operating condition and whether a valid key is present within the vehicle. The WIN then sends the proper lamp-ON or lamp-OFF message to the CCN. If the cluster flashes the security indicator when the ignition switch status transitions to ON, or turns ON the security indicator solid after the bulb test, it indicates that a SKIS malfunction has occurred or that the SKIS is ineffective.

For proper diagnosis of the VTSS, the SKIS, the WIN, the CCN, the CAN data bus or the electronic communication related to security indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.