Displays Test
Certain instrument panel cluster (IPC) features are tested when the ignition is turned on in order to verify the features are working properly. The following occurs at key up:
| • | The air bag indicator flashes 7 times (not IPC controlled). |
| • | The ABS indicator illuminates briefly. |
| • | The battery Indicator illuminates briefly. |
| • | The brake indicator illuminates briefly. |
| • | The coolant temperature indicator illuminates briefly. |
| • | The engine oil pressure indicator illuminates briefly. |
| • | The malfunction indicator lamp (MIL) illuminates briefly (not IPC controlled). |
| • | The seat belt indicator illuminates for 70 seconds or until the driver seat belt is latched (not IPC controlled). |
| • | The security indicator illuminates briefly. |
| • | The tire pressure low indicator illuminates briefly. |
| • | The vehicle dynamics caution (VDC) indicator illuminates briefly. |
| • | All message center segments illuminate briefly. |
| • | All odometer segments illuminate briefly. |
Indicators and Warning Messages
Refer to
Indicator/Warning Message Description and Operation.
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives serial data messages from the ECM indicating the engine coolant temperature. The engine coolant temperature gage
defaults to 60°C (140°F) or below if:
| • | The ECM detects a malfunction in the engine coolant temperature sensor circuit. |
| • | The IPC detects a loss of serial data communications with the ECM. |
Odometer
The instrument panel cluster (IPC) displays the odometer, trip odometer A and B in the driver information center (DIC). When the power mode is OFF or ACCY, a momentary press of the DIC trip/fuel switch displays the vehicle odometer. The trip odometer A
and B is accessed from the DIC trip/fuel switch and is part of the trip/fuel switch menu. When the trip odometer A or B is displayed in the DIC, a press of the set/reset switch clears the trip odometer. The IPC calculates the mileage based on the serial data
vehicle speed information from the engine control module (ECM). The IPC stores the odometer information in non volatile memory. The odometer will display 'error' if an internal IPC memory failure is detected. The odometer displays either miles or kilometers
as requested by the activation of the English/Metric mode from the DIC vehicle information switch.
PRND321 Display
The instrument panel cluster (IPC) displays the selected gear position in the driver information center (DIC) as determined by the transmission control module (TCM). The IPC receives serial data messages from the TCM indicating the gear position. The PRND321
display blanks if:
| • | The TCM detects a malfunction in the transmission range switch circuit. |
| • | The IPC detects a loss of serial data communications with the TCM. |
The manual shift mode gear position is also displayed in the DIC as M1, M2, M3, M4, M5 and M6. Also, when the transmission sport mode is selected, the DIC displays the sport mode indicator. Domestic vehicles only display gear position in the DIC while
export vehicles utilize the jewel gear position display.
Speedometer
The instrument panel cluster (IPC) displays the vehicle speed as determined by the engine control module (ECM). The IPC calculates the mileage based on the serial data vehicle speed information from the ECM. The speedometer defaults to 0 km/h (0 mph)
if the IPC detects a loss of serial data communications with both the ECM.
Tachometer
The instrument panel cluster (IPC) displays the engine speed as determined by the engine control module (ECM). The IPC receives serial data messages from the ECM indicating the engine speed. The tachometer will default to 0 rpm if:
| • | The ECM detects a malfunction in the engine speed sensor circuit. |
| • | The IPC detects a loss of serial data communications with the ECM. |
Clock
The instrument panel cluster (IPC) is equipped with an analog clock. The analog clock utilizes battery positive voltage circuit from the BCM and the clock ground circuit to operate. An open circuit condition, a high resistance or a short to ground in the
battery positive circuit or the ground circuit will cause the clock not to operate properly.
