Warning/Status Message Analysis

WARNING/STATUS MESSAGE ANALYSIS
This section is arranged in alphabetical order according to the Warning/Status message. Each message contains a concise description of the symptoms resulting in that message. In some cases a number will be displayed with a driver information message, such as "TRUNK OPEN 24 EXR" This indicates that the vehicle is configured for a country which does not use English as a primary language. The number provides a cross reference to a non-English owner's manual. To change the vehicle configuration, refer to "IPC Diagnostic Parameters" in this section, specifically the IPC Overrides, IPS01 through IPS05. The message analysis begins with "--" (dashed) display messages, which is then followed by actual messages.

DASHED MESSAGES

"--" Displayed In Engine RPM Or Coolant Temp
On vehicles equipped with digital clusters, the engine RPM and coolant temperature display will be "--" if a malfunction occurs in the serial data communications from the IPC to the PCM. This symptom should be diagnosed by retrieving and diagnosing the IPC to PCM serial data DTC IP 2016.

"--" Displayed In Fuel Data Center
If a malfunction occurs in the serial data communications from the IPC to the PZM, "--" will be displayed in the fuel data panel display. This symptom should be diagnosed by retrieving and diagnosing the PZM to IPC serial data DTC IP 2016.

"--" Displayed In Set Temp
If a malfunction occurs in the serial data communications from the IPC to the Heater and A/C Programmer (DTCs IP 2152 and AC 2096), "-" will be displayed in the IPC set temp indicator. This symptom should be diagnosed by retrieving and diagnosing DTCs.

"--" Displayed In Outside Temp
If the outside temperature sensor fails, "-" will be displayed in the outside temperature display on the IPC. This symptom will also appear if serial data communications from the IPC to the Heater and A/C Programmer fail. This symptom should be diagnosed by retrieving and diagnosing the ACM outside temperature (DTCs AC 1310 / AC 1311) or Loss of ACM Serial Data DTC IP 2152.

ACTUAL MESSAGES

A/C OFF For Engine Protection
The IPC will display this message when requested by a Class 2 serial request from the ACM. The ACM will transmit this request when it detects the conditions for DTC AC 1350 (engine coolant overtemperature).

Apply Brake To Shift
The Brake Transaxle Shift Interlock (BTSI) system requires that the regular service brake be applied to shift the vehicle out of Park. The PCM monitors the brake switch and the transmission position and broadcasts this information to the IPC via Class 2 serial data. If the transmission is in Park and the brake is not "ON," this message will be displayed.

Once this message is displayed, it will continue to be displayed until the brake is applied or the "INFORMATION" or "RESET" button is pressed. This message has a minimum display time of 5 seconds regardless of brake position.

The "APPLY BRAKE TO SHIFT" message can be canceled by pressing the "OFF" and "COOLER" buttons simultaneously for 5 seconds. Once the message is canceled, it can be brought back with the same procedure.

Battery No Charge
The IPC monitors the alternator L-terminal input on Connector C1 terminal "A9." If the alternator is not charging, ground is applied to the L-terminal. If the alternator is charging, the L-Terminal will be at ignition voltage. The IPC uses this input to detect DTC IP 1911 (Alternator "L" Terminal Problem). If it is detected, the "BATTERY NO CHARGE" message will be displayed. This will occur whenever the L-terminal input is "LOW" and the engine has been running over 400 RPM for more than 2 seconds.

Battery Volts Low
The IPC monitors battery voltage on connector C1 terminals "A1" and "B1," as a part of its self-diagnostic checks. If a low battery voltage (below 10-volts) condition exists, DTC IP 1981 will be set and the message BATTERY VOLTS LOW will be displayed.

Battery Volts High
The IPC monitors battery voltage on connector C1 terminals "A1" and "B1," as a part of its self-diagnostic checks. If a high battery voltage (above 16 volts) condition exists, DTC IP 1982 will be set and the message "BATTERY VOLTS HIGH" will be displayed.

Brake Vacuum Problem
If the PCM senses a malfunction in the Brake Vacuum system, it will issue a Class 2 serial data message to the IPC requesting that the BRAKE VACUUM PROBLEM message be displayed.

Change Engine Oil
If the PCM calculation shows engine oil life equals zero, it will broadcast a Class 2 serial data message to the IPC requesting that the message CHANGE ENGINE OIL be displayed.

Change Trans Fluid
If the PCM calculation shows transmission oil life equals zero, it will broadcast a Class 2 serial data message to the IPC requesting that the message CHANGE TRANS FLUID be displayed.

Check Brake Fluid Level
The IPC supplies 5 volts to the low brake fluid circuit. The IPC supplies and internally monitors the voltage level of the circuit at connector C2, terminal "A11." If the fluid level drops low enough the switch will ground and the IPC will detect a ground (less than 1-volt) at terminal "A11." If the voltage remains at ground for at least one second, the IPC will display the "CHECK BRAKE FLUID LEVEL" message. The IPC will also broadcast this message over the Class 2 serial data bus to the PZM for use by the ABS/TCS controller.

Check Coolant Level
The IPC directly monitors engine coolant level via a level switch. If the switch input on connector C2, terminal "A10" reflects a low coolant level after filtering for vehicle speed and acceleration, the CHECK COOLANT LEVEL will be displayed. The IPC will also broadcast this information to other modules via Class 2 serial data bus.

Check Fuel Gauge
This message is displayed if the fuel level goes below 15 liters (4 gallons) while in the Display "OFF" mode only. This message may be acknowledged by the driver or it will self acknowledge if the fuel level goes above 15 liters (4 gallons). Fuel level information is sent from the PZM to the IPC via Class 2 serial data bus message.

Check Oil Level
The engine oil level is continuously monitored by the PCM. If a low oil level condition is detected, the PCM will broadcast a Class 2 serial data bus request to the IPC to display the CHECK Oil LEVEL message on the Driver Information Center.

Cruise Engaged
This message is displayed by the IPC whenever requested by Class 2 serial data bus message from the PCM. There is no indicator for this function. It is displayed only on the Driver Information Center.

Driver Door Open
The IPC will display this message when the driver door is open/ajar, the engine is running and the transmission is not in park. If the vehicle speed is greater than 8 km/h (5 MPH), a chime will accompany the display.

Door Open
The IPC will display this message when a passenger door is open/ajar, the engine is running, transmission is not in park. If the vehicle speed is greater than 8 km/h (5 MPH), a chime will accompany the display.

Engine Coolant Hot Idle Engine
The IPC monitors coolant temperature as reported by the PCM over Class 2 serial data. When the PCM reports coolant temperature greater than 126°C (259°F), the IPC will display the "ENGINE COOLANT HOT - IDLE ENGINE" message. This message will continued to be displayed until coolant temperature falls below 121°C (250°F). This message will not be displayed if the IPC cannot communicate with the PCM (DTC IP 2016) or if the PCM determines there is a coolant sensor malfunction (DTC PC 1114 / PC 1115).

Fuel Level Very Low
Fuel level is broadcast from the PZM to the IPC over the Class 2 serial data bus every half-second, on changes of 0.5 liter (0.02 gallon) or on request from the IPC, with a resolution of0.04 liter (0.01 gallon). If updates are not received, or a communication error is detected by the IPC, a digital gauge will be dashed, or the analog gauge will move to "E". If the fuel level drops below 4.5 liters (1.2 gallons) the "FUEL LEVEL VERY LOW" will be displayed.

When the EEPROM Option Byte "C" is set to suppress low fuel warnings, the "Fuel Level Very Low" and "Check Fuel Gauge" driver warning messages will not be displayed. Also, on digital IPCs the fuel gage display will not flash "E" when the fuel level is very low. Instead, a solid "E" will be displayed. To verify proper vehicle configuration, refer to "IPC Diagnostic Parameters" in this section specifically IPSO2 (IPC EEPROM OPTION CONTENT).

Gear Select Problem
This message is displayed by the IPC if an erroneous Class 2 serial data bus PRNDL message is received from the PCM. Receipt of any legal gear state will clear this message.

Monitored System OK
The IPC will display this message in response to a driver message Recall mode request, when no other Driver Warning/Status messages are presently stored or active.

Options Not Set
The IPC will display the OPTIONS NOT SET message whenever Option Byte "C" bit 1 is set. See IPC override displays under IPC Diagnostic Parameters earlier in this section.

PCM Fault
The IPC displays the PCM FAULT message upon receipt of a Class 2 serial data bus request from the PCM. The PCM requests this message display when DTCs PC 0601 (PROM Checksum Mismatch) and PC 0602 (Flash Programming Error) are detected.

Phone No Info
The purpose of this message is to serve as an indication that the IPC Vehicle Option content shows a cellular telephone is installed in the vehicle, but no "initialization" data is available on the Class 2 serial data bus. This indicates, to the IPC, that the cellular telephone is not communicating on Class 2.

Reduced Engine Power
The IPC displays this message when requested by Class 2 serial data message from the PCM. The PCM sends this message to indicate that engine torque management is active or that other PCM trigger conditions exist.

Remove Key
The IPC displays this message alternating every three seconds following: WAIT THREE MINUTES, WAIT TWO MINUTES, WAIT ONE MINUTE messages until the key is turned to the lock position. This is a result of detecting DTC IP 2780 (Wrong Resistor Value Before Good). This informs the driver to remove the key before retrying it. Removing the key may wipe any contamination on the key. This also informs the driver to wait three minutes between tries, deterring use of a questionable key. A malfunctioning lock cylinder may cause this condition as well.

Service A/C System - A/C Compressor OFF
The IPC displays this message whenever requested via Class 2 serial data bus request from the ACM. This message indicates an evaporator inlet temperature sensor failure and accompanies ACM DTCs AC 1314 or AC 1315.

Service Air Bag
The IPC displays this message when requested by Class 2 serial data bus request from the PZM. This message indicates an SDM malfunction or loss of UART serial communication between PZM and 5DM.

Service Brake Fluid Switch
The IPC supplies 5 volts to the low brake fluid circuit. The IPC internally monitors the voltage level of the circuit at connector C2 terminal "A11." If CKT 849 is open, the IPC will detect greater than 4.0 volts at terminal "A11." If the voltage remains over 4.0 volts for at least one second, the IPC will display the "SERVICE BRAKE FLUID SWITCH" message. The IPC will also broadcast this message over the Class 2 serial data bus to the PZM for use by the ABS/TCS controller.

Service Charging System
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates the PCM is seeing a DTC PC 0560, "Generator Voltage Out of Range."

Service Fuel System
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates the PCM is seeing some combination of DTCs PC 0201 through PC 0208 (Fuel Injector Open or Shorted) or DTCs PC 0231 or PC 0232 (Fuel Pump Open or Shorted).

Service Emissions
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates any of a number of PCM DTCs (PC 01XX) may be set.

Service Electrical System
The IPC will display SERVICE ELECTRICAL SYSTEM whenever a Class 2 serial data bus request from the PCM is received. This message is indicative of an alternator voltage out of range (below 10 or above 16 volts) with the engine above 500 RPM, for a minimum of 5 seconds. DTCs PC 1380/PC 1381 (EBTCM related) will also request this message.

Service Engine Cooling System
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates that the PCM has detected DTC PC 1258.

Service Idle Control System
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates that a difference exists between PCM commanded engine idle speed and actual engine idle speed.

Service Ignition System
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates the PCM is experiencing DTCs PC 13223, PC 1350, PC 1371, PC 1372, PC 1373 or PC 1375 (Ignition reference signal related).

Service Ride Control
The IPC will display this message whenever a Class 2 serial data bus request is received from the PZM. This message indicates the PZM is seeing a UART serial data bus communication malfunction or that the RSS or CVRSS controller has failed.

Service Transmission
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates that the transmission has experienced an over torque or over temperature condition.

Speed Sensor Fault
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates that PCM DTC PC 0500 is active (Speed Sensor Signal Problem). Cruise control is automatically disabled when this condition exists.

Start Car
The IPC displays this message following the WAIT THREE MINUTES, WAIT TWO MINUTES, WAIT ONE MINUTE sequence which is a result of detecting DTC IP 2780 (Wrong Resistor Value Before Good). This informs the driver try again after a wait of three minutes, if a questionable key is being sensed. A malfunctioning lock cylinder may cause this condition as well. This message will display for 15 seconds, or a minimum of 3 seconds following an ignition transition to the RUN position.

Starting Disabled Due To Theft System Remove Ignition Key
The IPC will display this message whenever a bad key resistance value is detected. If DTC IP 2710 (PASS-Key II Open/Shorted Key Pellet Before Good) will produce this message. DTC IP 2780 will trigger a three minute sequence, with messages, before a retry may be attempted.

Stop Engine Engine Overheated
When the engine metal temperature switch closes (an overheated engine metal condition present), the PCM will broadcast a Class 2 serial data message to the IPC requesting display of the STOP ENGINE - ENGINE OVERHEATED message. This message is accompanied by a warning chime.

Stop Engine Low Oil Pressure
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates the PCM has detected a low oil pressure condition.

Theft System Problem Car May Not Restart
This message is displayed by the IPC if a pass key or EEPROM failure is detected by the self-diagnostics program. DTCs IP 2016, IP 2711, IP 2750, IP 2781 or IP 2783 are possible causes for this message.

Top Speed Fuel Cut-Off
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates that the top speed for the vehicle option selected has been sensed, and the PCM has cut off fuel to prevent exceeding this limit.

Traction Active
The IPC will display this message whenever a Class 2 serial data bus request is received from the PZM. This message indicates the Traction Control System (TCS) is active. Each time the TCS experiences a transition to ACTIVE, the state is reflected in a UART serial data bus message to the PZM, which is translated into a Class 2 serial data bus display request to the IPC. This display is turned "OFF" to indicate traction is inactive.

Traction OFF
The IPC will display this message whenever a Class 2 serial data bus request is received from the PZM. This message indicates the Traction Control System (TCS) has been disabled after being turned "ON" via the driver selectable switch. Each time the TCS experiences an ON/OFF transition, the state is reflected in a UART serial data bus message to the PZM, which is translated into a Class 2 bus request to the IPC.

Traction Ready
The IPC will display this message whenever a Class 2 serial data bus request is received from the PZM. This message indicates the Traction Control System (TCS) has been re-enabled after being turned off via the driver selectable switch. Each time the TCS experiences an ON/OFF transition, the state is reflected in a UART serial data bus message to the PZM, which is translated into a Class 2 serial data bus request to the IPC.

Trans Fluid Reset
The IPC will display this message whenever a Transmission Fluid Reset request is sent to the PCM, and the PCM returns an acknowledge, stating the fluid life has been reset to 100%. This message will display for approximately three seconds and then clear.

Transmission Hot
The IPC will display this message whenever a Class 2 serial data bus request is received from the PCM. This message indicates either the transmission has been hotter than 1 44°C (291°F) for more than 32 seconds or hotter than 1 30°C (266°F) for more than 15 minutes. The transmission must be less than 120°C (248°F) for more than 5 seconds to clear this message.

Trunk Open
The IPC displays TRUNK OPEN when requested by Class 2 message request from the PZM. This message indicates a Trunk Ajar signal is present and the ignition is in the "RUN" position.

Turn Signal ON
The IPC will display the TURN SIGNAL ON message any time a turn signal has been ON for a distance of 1 mile (1.6 km).

Vehicle Overspeed
The IPC will display this message whenever Class 2 serial data bus vehicle speed data from the PCM indicates 120 kph has been exceeded and the Saudi/Gulf states EEPROM Option Flag is set.

Very Low Refrigerant - A/C Compressor OFF
The IPC will display this message whenever a Class 2 serial data bus request is received from the Heater and A/C Programmer. This message indicates the Heater and A/C Programmer is probably detecting DTC AC 1347 or AC 1348.

Wait 1/2/3 Minutes
The IPC displays this message following the WAIT 3 MINUTES, WAIT 2 MINUTES, WAIT 1 MINUTE SEQUENCE which is a result of detecting DTC IP 2780 (wrong resistor value before good). This informs the driver to remove the key and wait three minutes between tries if a questionable key is being used. A malfunctioning lock cylinder may cause this condition as well.