Part - 4

OPERATION

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 LCD 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 switch output (run-start) circuit. Therefore, the LCD park assist disabled indication will always be OFF when the ignition switch is in any position 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 is turned to the OFF position, 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.

PERFORM SERVICE INDICATOR

The perform service indicator gives an indication to the vehicle operator when the service distance (kilometers or miles to service) setting becomes zero. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received by the cluster from the PCM over the CAN data bus.

The perform service indicator function of the LCD 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 switch output (run-start) circuit. Therefore, the LCD perform service indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the perform service indicator for the following reasons:

- Kilometers Or Miles To Service calculation Equals Zero - The target service distance is set using the customer programmable features function of the Electronic Vehicle Information Center (EVIC). The cluster subtracts the current odometer distance reading from the target service distance setting to compute the kilometers or miles to service. Each time the ignition switch is turned to the ON position and the cluster calculates that the kilometers or miles to service equals zero, the perform service indicator will be illuminated. The indicator remains illuminated for about three seconds, until the EVIC target service distance is reset, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The PCM continually monitors the vehicle speed pulse information received from the wheel speed sensors, then sends the proper distance messages to the CCN over the CAN data bus. The CCN continually compares the displayed odometer distance to the target service distance setting to determine the kilometers or miles to service, then controls the perform service indicator as appropriate.

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

POSITION LAMP INDICATOR

The position lamp indicator gives an indication to the vehicle operator whenever the position lamps are illuminated. This indicator is controlled by a transistor on the instrument cluster circuit board based upon cluster programming and electronic messages received by the cluster from the Front Control Module (FCM) over the CAN data bus.

The position lamp 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 position. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will turn ON the position lamp indicator for the following reasons:

- Position Lamp Indicator Lamp-On Message - Each time the cluster receives an electronic position lamp indicator lamp-ON message from the FCM indicating the position lamps are turned ON, the position lamp indicator will be illuminated. The indicator remains illuminated until the cluster receives a lamp-OFF message from the FCM, or until the exterior lamp load shedding (battery saver) timed interval expires, whichever occurs first.

The FCM continually monitors electronic exterior lighting switch request messages from the CCN to determine the appropriate outputs to the park lamp relay. The FCM activates or deactivates the park lamp relay then sends the proper lamp-ON or lamp-OFF message back to the CCN.

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

REAR FOG LAMP INDICATOR

The rear fog lamp indicator gives an indication to the vehicle operator whenever the rear fog lamps are illuminated. This indicator is controlled by a transistor on the instrument cluster circuit board based upon cluster programming and electronic messages received by the cluster from the Front Control Module (FCM) over the CAN data bus.

The rear fog lamp 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 position. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will turn ON the rear fog lamp indicator for the following reasons:

- Rear Fog Indicator Lamp-On Message - Each time the cluster receives an electronic rear fog indicator lamp-ON message from the FCM indicating the rear fog lamps are turned ON, the rear fog lamp indicator will be illuminated. The indicator remains illuminated until the cluster receives a lamp-OFF message from the FCM.
- Self Test - Each time the cluster is put through the self test, the rear fog lamp indicator will be turned ON, then OFF again during the bulb check portion of the test to confirm the functionality of the LED and the cluster control circuitry.

The FCM continually monitors electronic exterior lighting switch request messages from the CCN to determine the appropriate outputs to the rear fog lamp relay. The FCM then sends the proper lamp-ON or lamp-OFF message back to the CCN.

For proper diagnosis of the rear fog lamp system, the FCM, the CCN, the CAN data bus or the electronic communication related to rear fog lamp 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 Front Control Module (FCM) and the Wireless Ignition Node (WIN).

The remote start indicator function of the LCD 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 LCD remote start indications can be illuminated regardless of the ignition switch position. The instrument cluster will turn ON the remote start indicator for the following reasons:

- Key Not In Ignition - Remote Start Active Messages - Each time the cluster receives a combination of electronic key not inserted and remote start active messages from the FCM, the INSERT KEY TURN TO ON textual message is displayed. The message is displayed for about five seconds, until the cluster arbitrator logic determines that another display request has priority, or until the key is inserted into the ignition, whichever occurs first.
- Key In Ignition - Remote Start Active Messages - Each time the cluster receives a combination of electronic key inserted and remote start active messages from the FCM and ignition LOCK or ignition OFF messages from the WIN, the TURN TO ON textual message is displayed. The message is displayed for about five seconds, until the cluster arbitrator logic determines that another display request has priority, or until the ignition is turned to the ON position, whichever occurs first.

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

For proper diagnosis of the remote start system, the WIN, the FCM, 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 switch output (run-start) circuit. Therefore, the LED will always be OFF when the ignition switch is in any position 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 switch output (run-start) circuit, the indicator will be illuminated as a seatbelt reminder for about six seconds, or until the ignition switch is turned to the OFF position, 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) with the ignition switch in the START or ON positions, 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 is turned to the OFF position, 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) with the ignition switch in the START or ON positions, 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 is turned to the OFF position, 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 each time the ignition is turned to the ON position, during the bulb test.

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 position. 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 is turned to the OFF position, 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 re-configurable dot matrix display. 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 is in the OFF position and the VTSS is arming, armed, or alarming. Whenever the ignition switch is in the ON or START positions, the WIN performs a self-test to decide whether the SKIS is in good operating condition and whether a valid key is present in the ignition lock cylinder. The WIN then sends the proper lamp-ON or lamp-OFF message to the CCN. If the cluster flashes the security indicator upon ignition 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.

SERVICE 4WD INDICATOR

The service 4WD indicator gives an indication to the vehicle operator when the Final Drive Control Module (FDCM) has recorded a DTC for an electronic transfer case circuit or component malfunction. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received by the cluster from the FDCM over the CAN data bus.

The service 4WD indicator function of the LCD 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 switch output (run-start) circuit. Therefore, the LCD service 4WD indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the service 4WD indicator for the following reasons:

- Service 4WD Indicator Lamp-On Message - Each time the cluster receives an electronic service 4WD indicator lamp-ON message from the FDCM, the service 4WD indicator will be illuminated. The indicator remains illuminated for about five seconds, until the cluster receives a lamp-OFF message from the FDCM, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The FDCM continually monitors the electronic transfer case control circuits and transfer case shift motor/mode sensor assembly to determine the condition of the system. The FDCM then sends the proper lamp-ON or lamp-OFF message to the CCN.

For proper diagnosis of the FDCM, the CCN, the CAN data bus or the electronic communication related to service 4WD indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

SERVICE COLUMN LOCK INDICATOR

The service column lock indicator gives an indication to the vehicle operator when the Wireless Ignition Node (WIN) has recorded a DTC for a steering column shaft lock module circuit or component malfunction. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received by the cluster from the WIN over the CAN data bus.

The service column lock indicator function of the LCD 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 switch output (run-start) circuit. Therefore, the LCD service column lock indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the service column lock indicator for the following reasons:

- Service Column Lock Indicator Lamp-On Message - Each time the cluster receives an electronic service column lock indicator lamp-ON message from the WIN, the service column lock indicator will be illuminated. The indicator remains illuminated for about five seconds, until the cluster receives a lamp-OFF message from the WIN, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The WIN continually monitors the steering column shaft lock module circuits and components to determine the condition of the system. The WIN then sends the proper lamp-ON or lamp-OFF message to the CCN.

For proper diagnosis of the shaft lock module, the WIN, the CCN, the CAN data bus or the electronic communication related to service column lock indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

SERVICE EXHAUST INDICATOR

The service exhaust indicator gives an indication to the vehicle operator when the diesel exhaust particulate filter is clogged, requiring service or replacement. 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 PCM.

The service exhaust indicator function of the LCD 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 switch output (run-start) circuit. Therefore, the LCD service exhaust indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the service exhaust indicator for the following reasons:

- Service Exhaust Indicator Lamp-On Message - Each time the cluster receives an electronic service exhaust indicator lamp-ON message from the PCM indicating the diesel exhaust particulate filter is clogged, the service exhaust indicator will be illuminated. The indicator remains illuminated for about five seconds, until the cluster receives a lamp-OFF message from the PCM, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The PCM continually monitors a diesel engine particulate filter differential pressure sensor to determine the condition of the particulate filter. The PCM then sends the proper lamp-ON or lamp-OFF message to the CCN.

For proper diagnosis of the diesel engine particulate filter system, the differential pressure sensor, the PCM, the CCN, the CAN data bus or the electronic communication related to service exhaust indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.