Navigation System Schematic Icons Icon Icon Definition IMPORTANT: Twisted-pair wires provide an effective "shield" that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 9 turns per 31 cm (12 in) as measured anywhere along the length of the wires The outside diameter of the twisted wires must not exceed 6.0 mm (0.25 in)
| Callout | Component Name |
|---|---|
| 1 | Dimmer/Head Up Display (HUD) Switch |
| 2 | Turn Signal/Multifunction Switch |
| 3 | Inflatable Restraint Steering Wheel Module |
| 4 | Instrument Panel Cluster (IPC) |
| 5 | Air Temperature Sensor - Inside |
| 6 | Windshield Wiper/Washer Switch |
| 7 | Driver Information Center (DIC) Switch |
| 8 | Hazard Switch |
| 9 | CD Changer |
| 10 | Valet Switch |
| 11 | Inflatable Restraint I/P Module |
| 12 | Inflatable Restraint I/P Module Disable Switch |
| 13 | I/P Compartment Lamp |
| 14 | Radio |
| 15 | HVAC Control Module |
| 16 | Cigar Lighter |
| 17 | Courtesy Lamp Switch - Console |
| 18 | Folding Top Switch |
| 19 | Inflatable Restraint I/P Module Disable Switch LED |
| 20 | Traction Control Switch |
| 21 | Auxiliary Power Outlet |
| 22 | Courtesy Lamp - Console |
| 23 | Automatic Transmission Shift Lever |
| 24 | Ignition Mode Switch |
| 25 | Steering Wheel Controls - Right |
| 26 | Horn Switch |
| 27 | Data Link Connector (DLC) |
| 28 | Steering Wheel Controls - Left |
| Callout | Component Name |
|---|---|
| 1 | Speaker - Left Front Midrange |
| 2 | Speaker - Center |
| 3 | Navigation Antenna |
| 4 | Speaker - Right Front Midrange |
| Connector Part Information OEM: 15383013 Service: 88953363 Description: 6-Way F (WH) |
|---|
| Terminal Part Information Pins: 2, 3, 5, 6 Terminal/Tray: 15445905/23 Core/Insulation Crimp: J/J Release Tool/Test Probe: 12180559/J-35616-6 (BN) |
Navigation System Connector End Views
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | Not Used | ||
| 2 | YE | 5385 | Vehicle Identification Communication System Bus Request Signal |
| 3 | GY | 5383 | Vehicle Identification Communication System High Signal |
| 4 | Not Used | ||
| 5 | BARE | 514 | Drain Wire |
| 6 | BN | 5384 | Vehicle Identification Communication System Low Signal |
Radio C3 (Japan)
| Connector Part Information OEM: 15316408 Service: 15316408 Description: 10-Way F (WH) |
|---|
| Terminal Part Information Pins: 1, 2, 3, 4, 5, 6, 7 Terminal/Tray: See Terminal Repair Kit Core/Insulation Crimp: See Terminal Repair Kit Release Tool/Test Probe: See Terminal Repair Kit |
Navigation System Connector End Views
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | GY | 5383 | Vehicle Identification Communication System High Signal |
| 2 | BN | 5384 | Vehicle Identification Communication System Low Signal |
| 3 | RD/WH | 740 | Battery Positive Voltage |
| 4 | YE | 43 | Accessory Voltage Signal |
| 5 | BK/WH | 651 | Ground |
| 6 | YE | 5385 | Vehicle Identification Communication System Bus Request Signal |
| 7 | BARE | 514 | Drain |
| 8-10 | Not Used |
Traffic Information Receiver (Japan)
| DTC | Description |
|---|---|
| DTC B0001 | Vehicle Speed Information Circuit Range/Performance |
| DTC B2462 | Global Positioning System (GPS) Signal Error |
| DTC B2463 | Navigation Compact Disk Player - No Disk |
| DTC B2464 | Navigation Compact Disk Player - Decoding Error |
| DTC B2465 | Navigation Compact Disk Player - Data Error |
| DTC B2466 | Navigation Vehicle Information Communication System (VICS) Memory Error |
| DTC B2468 | Navigation Display Unit Performance |
| DTC B2474 | Navigation Display Head (NDH) Backlighting Performance |
| DTC U2153 | Navigation Electronic Control Unit (ECU) - VICS Communication Circuit |
DIAGNOSTIC CODE INDEX
Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check - Vehicle will provide the following information
- The identification of the control modules which command the system.
- The ability of the control modules to communicate through the serial data circuit.
- The identification of any stored DTCs and their status.
The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON/Engine OFF/Radio ON | |||
| 8-Digit GM Part Number | Module Information 1 | Numeric | Varies |
| Auto Volume Control St | Radio Data 1 | Active/Inactive | Active |
| Band Status | Radio Data 1 | AM/FM1/FM2 | FM1 |
| Build Sequence Number | Module Information 2 | Alphanumeric | Varies |
| Calibration ID | Module Information 1 | Alphanumeric | Varies |
| Clock Status | Radio Data 1 | 12Hr/24Hr | 12 Hr |
| Personalization Status | Radio Data 1 | Driver1/Driver2 | 1 (2 if the memory 2 button has been activated) |
| DSP Status | Radio Data 1 | OFF/Talk/Driver Seat/Spacious | Spacious |
| Ign. Cycles Since Last | Radio Data 2 | Numeric | Varies |
| Julian Date of Build | Module Information 2 | Numeric | Varies |
| Language | Radio Data 1 | English | |
| Long Wave Status | Radio Data 1 | Present/Not Present | Not Present |
| Manufacturing Shift Inf | Module Information 2 | Alphanumeric | Varies |
| Manufacturing Site | Module Information 2 | Alphanumeric | Varies |
| Navigation Software Version | Module Information | Varies | Varies |
| New VIN Counter | Radio Data 1 | Numeric | Varies |
| Point of Sale | Radio Data 1 | US | |
| Preset Status | Radio Data 1 | Home/Away | Home |
| PROM ID | Module Information 1 | Alphanumeric | Varies |
| Region | Radio Data 1 | US | |
| Radio Signal Strength | Radio Data 1 | DB | 19dB |
| Source ID | Module Information 2 | Numeric | Varies |
| Source Status | Radio Data 1 | Tuner | |
| Theft Lock Status | Radio Data 1 | Active/Inactive | Inactive |
| Total CDX Hours | Radio Data 2 | Hours | Varies |
| Total Radio Hours | Radio Data 2 | Hours | Varies |
| TV Signal Strength | Radio Data 1 | DB | 00dB |
| Year Module Built | Module Information 2 | Numeric | Varies |
Radio/Integrated Radio Control (IRC)
The navigation radio receives the vehicle speed signal from the engine control module (ECM) through a dedicated circuit shared with the instrument cluster.
This diagnostic procedure supports the following DTC
DTC B0001 Vehicle Speed Information Circuit Range/Performance
- The navigation radio must detect a power mode transition to ON.
- The radio does not set this DTC if B1327 or B1328 is current.
- The vehicle must drive for 4 km (2.5 mi) after receiving a global positioning system (GPS) signal.
The navigation radio compares the vehicle speed signal from the ECM to the GPS location signal every second. If the GPS signal indicates that the vehicle has traveled 4 km (2.5 mi) but no vehicle speed signal was received, the radio sets the DTC.
The navigation radio uses the GPS signal when the vehicle speed signal from the ECM is unavailable.
The following symptoms may happen if the vehicle speed signal from the ECM is unavailable
- The vehicle icon may jump to different positions on the map screen.
- The vehicle icon, current position marker may not move on the map screen while the vehicle is being driven.
- The route guidance accuracy may be degraded.
- A current DTC clears when the navigation radio detects the vehicle speed signal from the ECM for more than one second.
- A history DTC clears after 50 ignition cycles without a vehicle speed signal failure.
An intermittent condition may be caused by the following
- Mis-routed harness
- Rubbed through wire insulation
- Broken wire inside the insulation
- A loose connector pin
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 3: Tests for an open in the vehicle speed signal circuit between the instrument cluster and the navigation radio. A short would cause the instrument cluster to malfunction as well as the navigation system.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Navigation System Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Verify the instrument cluster speedometer operation. Does the speedometer work on the instrument cluster? | Go to Step 3 | Go to Symptoms - Instrument Panel, Gages and Console in Instrument Panel, Gages, and Console |
| 3 | Test the vehicle speed signal circuit for an open between the instrument cluster and the navigation radio. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the navigation radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the navigation radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 6 | |
| 6 | Use the scan tool in order to clear the DTC. Drive the vehicle at least 4 km (2.5 mi) with the global positioning system (GPS) signal received. Leave vehicle running and retrieve DTCs. Does the DTC reset? | Go to Step 2 | System OK |
DTC B0001
The global positioning system (GPS) antenna is connected to the navigation radio by a coaxial cable.
This diagnostic procedure supports the following DTC
DTC B2462 Global Positioning System (GPS) Signal Error
The radio must detect one of the following power modes
- ACC
- ON
- RAP
- RAP UNLK
DTC B2462 does not set if DTC B1328 or B1327 is current.
- The navigation radio test the GPS antenna every 10 seconds.
- The radio determines there is an open in the GPS antenna.
- DTC B2462 does not set if DTC B1328 or B1327 is current.
- Unable to get GPS location updated, the radio uses the last reported position and the vehicle speed signal to calculate the vehicle position.
- Route guidance may be inaccurate.
- This failure has no effect outside the navigation system.
- A current DTC clears when the radio does not detect the failure for more than 10 seconds.
- A history DTC clears after 50 ignition cycles with no repeat of the failure.
An intermittent condition may be caused by the following
- Mis-routed harness
- Rubbed through wire insulation
- Broken wire inside the insulation
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 3: Determines if the malfunction is due to an internal fault in the navigation radio or a GPS antenna failure.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Navigation System Schematics | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Turn OFF the ignition. Disconnect the global positioning system (GPS) coaxial cable connector. Measure the voltage between the center conductor and the shield of the coaxial cable still attached to the navigation radio. Is the voltage within the specified range? | 4.0-5.5 V | Go to Step 5 | Go to Step 3 |
| 3 | Test the GPS cable for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 4 | |
| 4 | Inspect for poor connections at the harness connector of the GPS cable. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 6 | |
| 5 | Replace the GPS antenna. Refer to Global Positioning System (GPS) Antenna Replacement . Did you complete the replacement? | Go to Step 7 | ||
| 6 | Replace the navigation radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 7 | ||
| 7 | Use the scan tool in order to clear the DTC. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK | |
DTC B2462
The circuitry is internal to the navigation radio.
This diagnostic procedure supports the following DTC
DTC B2463 Navigation Compact Disk Player - No Disk
The navigation radio runs the DTC when a map DVD is inserted into the radio or when the radio detects a transition from OFF-ASLEEP to ACC, ON or RAP.
DTC B2463 does not set if DTC B1328 or B1327 is current.
- The navigation radio functions are activated with no navigation DVD in the navigation radio DVD slot.
- DTC B2463 does not set if DTC B1328 or B1327 is current.
- No map appears on the navigation radio when the MAP button located beside the display is pressed.
- The PLEASE INSERT MAP DVD message appears on the navigation radio screen.
- The navigation buttons do not function.
- This failure has no effect outside the system navigation functions.
A current DTC clears when the navigation radio detects a navigation DVD.
| IMPORTANT | If DTC B2465 is also set, service B2465 before servicing B2463. |
Make sure the DVD installed is a navigation system map DVD defined for this system. Also be sure the label is on the top side of the installed DVD.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Determines if the malfunction was due to no map DVD in the navigation module DVD player.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Insert map DVD into DVD player behind the sliding cover on the navigation radio. Make sure the DVD is positioned correctly. Did you complete the installation of the DVD? | Go to Step 3 | |
| 3 | Use the scan tool in order to clear the DTC. Disconnect the scan tool. Turn OFF the ignition. Open then close the driver door to disable the retained accessory power (RAP) function. Do not activate any vehicle functions for one minute. Turn ON the ignition with the engine OFF. Remove and reinsert the map DVD. Install a scan tool. Check for DTC B2463. Does the DTC reset? | Go to Step 4 | Go to Step 5 |
| 4 | Replace the navigation radio. Refer to Control Module References . Did you complete the repair? | Go to Step 5 | |
| 5 | Use the scan tool in order to clear the DTC. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B2463
The circuitry is internal to the navigation radio. The system does not function when the internal temperature reaches 70°C (158°F) or above. This feature prevents heat damage to internal components.
This diagnostic procedure supports the following DTC
DTC B2464 Navigation Compact Disk Player - Decoding Error
- The navigation radio detects a power mode transition from OFF-ASLEEP to ON.
- The radio attempts a read from the digital video disk (DVD) or when a new DVD is inserted.
- Neither DTC B1328 nor DTC B1327 is current.
- The navigation radio is unable to read the DVD because of a laser focus error, there is a table of contents error or the DVD laser head temperature is above 70°C (158°F).
- DTC B2464 does not set if DTC B1328 or DTC B1327 is current.
- No map or blue screen appears on the display and index is not usable.
- Navigation buttons do not function.
- This failure has no effect outside the navigation system.
- A current DTC clears when the navigation radio detects a read from a navigation DVD.
- The laser head temperature cools to less than 70°C (158°F).
| IMPORTANT | If DTC B2463 or B2465 is also set with DTC B2464, service B2463 and B2465 before DTC B2464. |
Make sure the map DVD is the correct one for this system.
Cycle the ignition switch even after a successful inspection with a scan tool so initialization will occur.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Determines if the malfunction was due to no map DVD in the navigation module DVD player.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn OFF the ignition. Open, then close the driver door to cancel retained accessory power (RAP). Turn ON the ignition with the engine OFF. Use the scan tool in order to clear the DTC. Remove and reinsert the map DVD. Retrieve DTCs from the navigation radio. Does the DTC reset? | Go to Step 3 | Go to Step 6 |
| 3 | Turn OFF the ignition. Open, then close the driver door to cancel RAP. Wait one minute. Turn ON the ignition with the engine OFF. Use the scan tool in order to clear the DTC. Install a new map DVD in the radio. Retrieve DTCs from the navigation radio. Does the DTC reset? | Go to Step 4 | Go to Step 6 |
| 4 | Turn OFF the ignition. Open, then close the driver door to cancel RAP. Allow the navigation radio to cool for one hour. Turn ON the ignition with the engine OFF. Use the scan tool in order to clear the DTC. Remove, then insert the map DVD. Retrieve DTCs from the navigation radio. Does the DTC reset? | Go to Step 5 | Go to Step 6 |
| 5 | Replace the navigation radio. Refer to Control Module References . Did you complete the repair? | Go to Step 6 | |
| 6 | Use the scan tool in order to clear the DTC. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B2464
The circuitry is internal to the navigation radio.
This diagnostic procedure supports the following DTC
DTC B2465 Navigation Compact Disk Player - Data Error
- The navigation radio detects a power mode transition to awake with a proper map DVD installed or when a CD is inserted.
- DTC B2465 does not set if DTC B1328 or B1327 is current.
The navigation radio has determined that the incorrect CD has been inserted.
- No map appears on the display.
- PLEASE INSERT MAP DVD message appears on the display.
- The navigation buttons do not function.
- This failure has no effect outside the navigation system.
A current DTC clears when the navigation radio detects a navigation DVD.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Determines if the malfunction was due to no map DVD in the navigation radio DVD player.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | IMPORTANT: The CD installed must be a map DVD as defined for this system. Use the scan tool in order to clear the DTC. Turn the ignition ON with the engine OFF. Install a correct map DVD into the navigation radio. Does the DTC reset? | Go to Step 3 | Go to Step 4 |
| 3 | Replace the navigation radio. Refer to Control Module References . Did you complete the repair? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTC. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| The CD installed must be a map DVD as defined for this system. |
DTC B2465
This internal vehicle information communication system (VICS) memory test in internal to the navigation radio.
This diagnostic procedure supports the following DTC
DTC B2466 Navigation Vehicle Information Communication System (VICS) Memory Error
The navigation radio tests the VICS memory when it detects a power mode transition to ON.
- The navigation radio determines there is an internal error in the radio.
- DTC B2466 does not set if DTC B1328 or B1327 is current.
- Last VICS information is displayed if requested.
- Limited or no VICS information is used in route guidance.
- VICS switch may not be displayed on the screen.
- This failure has no effect outside the navigation system.
A current DTC will clear when the navigation radio does not detect the failure during the last power mode transition.
Cycle the ignition switch even after a successful inspection with a scan tool in order to initialize the system.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Verifies that the DTC sets under normal operating conditions.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Use the scan tool in order to clear the DTC. Disconnect the scan tool. Turn OFF the ignition. Open, then close driver door to cancel retained accessory power (RAP). IMPORTANT: Do not operate any vehicle system for one minute. Connect a scan tool. Turn ON the ignition with the engine OFF. Retrieve DTCs from the navigation radio. Does the DTC reset? | Go to Step 3 | Go to Diagnostic System Check - Vehicle |
| 3 | Replace the navigation radio. Refer to Control Module References . Did you complete the replacement? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTC. Operate the vehicle according to the Conditions for Running the DTC in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| Do not operate any vehicle system for one minute. |
DTC B2466
Internal error detection is determined inside the navigation radio. No external circuits are involved.
This diagnostic procedure supports the following DTC
DTC B2468 Navigation Display Unit Performance
- The navigation radio performs this test when it detects a power mode transition to one of the following: ACC ON
- The navigation radio does not set this DTC if B1327 or B1328 is current.
The navigation radio is unable to write to memory and the test detects a computation error.
Any of the following may be observed
- Black screen and the audio cannot be changed.
- The TV screen adjustment settings change to the default settings.
- The navigation screens may still be available.
The navigation radio is able to write to memory and there is no computation error when there is a power mode transition.
- This DTC may be stored as a history DTC with out affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
- If this DTC is retrieved as both a current and history DTC, replace the module.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Verifies that the DTC sets under normal operating conditions.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn OFF the ignition. Disconnect the scan tool. Open, then close driver door to cancel retained accessory power (RAP). IMPORTANT: Do not operate any vehicle system for one minute. Connect a scan tool. Turn ON the ignition with engine OFF. Retrieve DTCs from the navigation radio. Is DTC B2468 a current DTC? | Go to Step 3 | Go to Diagnostic System Check - Vehicle |
| 3 | Replace the navigation radio. Refer to Control Module References . Did you complete the replacement? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTC. Operate the vehicle according to the Conditions for Running the DTC in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| Do not operate any vehicle system for one minute. |
DTC B2468
The backlighting error detection is determined inside the navigation radio. No external circuits are involved.
This diagnostic procedure supports the following DTC
DTC B2474 Navigation Display Head (NDH) Backlighting Performance
- The navigation radio checks for a backlighting internal error every 5 seconds during the following power modes: ACC ACC ON
- DTC B2474 does not set if DTC B1328 or DTC B1327 is current.
A B2474 sets if any of the following conditions are present
- Backlighting circuit/bulb failure
- Backlighting circuit current consumption is too high.
- Backlighting heater is not providing heat.
- The navigation radio temperature is over 105°C (221°F).
Any of the following may be observed
- Black screen and the audio and navigation functions cannot be controlled.
- The screen brightness is incorrect.
- Changes to the screen brightness are inconsistent.
The navigation radio determines that the backlighting fault is not present.
This DTC may be stored as a history DTC without affecting the operation of the navigation radio. If stored only as a history DTC and not a current DTC, do not replace the radio.
The numbers below refer to the step numbers on the diagnostic table.
- 1: This step determines if the malfunction is present.
- 2: This step verifies that the DTC sets under normal operating conditions.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn OFF the ignition. Allow the navigation radio to cool for one hour. Turn ON the ignition with the engine OFF. Retrieve DTCs from the navigation radio. Is B2474 a current DTC? | Go to Step 3 | Go to Diagnostic System Check - Vehicle |
| 3 | Replace the navigation radio. Refer to Control Module References . Did you complete the replacement? | Go to Step 4 | |
| 4 | Use the scan tool in order to clear the DTC. Operate the vehicle according to the Conditions for Running the DTC in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B2474
The traffic information receiver (VICS) communicates with the navigation radio over 3 circuits. These are the traffic information signal (+) circuit, the traffic information signal (-) circuit and the traffic information request signal.
This diagnostic procedure supports the following DTC
DTC U2153 Navigation Electronic Control Unit (ECU) - VICS Communication Circuit
- The vehicle must be equipped with the VICS. This system is available only on export vehicles (UE9) and is dealer installed.
- The navigation radio must detect a power mode transition from OFF-ASLEEP to ON.
- The navigation radio does not set this DTC if B1327 or B1328 is current.
There is no response from the VICS module when queried by the navigation radio after successfully initializing the system.
The navigation radio does not receive information from the VICS module when the radio detects a power mode transition to ON.
The VICS switch disappears from the navigation system menu.
The navigation radio receives a response from the VICS module.
The numbers below refer to the step numbers on the diagnostic table.
- 1: Determines if the malfunction is present.
- 2: Verifies that the DTC sets under normal operating systems.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Use the scan tool to clear the DTCs. Disconnect the scan tool. Turn OFF the ignition. Open, then close driver door to cancel retained accessory power (RAP). IMPORTANT: Do not operate any vehicle system for one minute. Connect a scan tool. Turn ON the ignition with the engine OFF. Retrieve DTCs from the navigation radio. Does the DTC reset? | Go to Step 3 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 3 | Test the traffic information signal (+) circuit for the following: An open A short to ground A short to voltage High resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 4 |
| 4 | Test the traffic information signal (-) circuit for the following: An open A short to ground A short to voltage High resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 5 |
| 5 | Test the traffic information request signal circuit for the following: An open A short to ground A short to voltage High resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connectors of the traffic information receiver (VICS). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connectors of the navigation radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
| 8 | Replace the VICS. Refer to the VICS dealer installation instructions. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
| 9 | Replace the navigation radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the repair? | Go to Step 10 | |
| 10 | Use the scan tool to clear the DTCs. Operate the vehicle as specified within the Conditions for Running the DTC in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
| IMPORTANT |
|---|
| Do not operate any vehicle system for one minute. |
DTC U2153
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform the «Diagnostic System Check - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
- Review «Navigation System Description and Operation»(/cadillac/xlr/i-2003-2009/remont/navigation-system/#navigation-systems__navigation-system-description-and-operation) in order to familiarize yourself with the system functions.
- Inspect for aftermarket devices which could affect the operation of the navigation system components. Refer to «Checking Aftermarket Accessories»(/cadillac/xlr/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «No Global Positioning System (GPS) Reception»(/cadillac/xlr/i-2003-2009/remont/navigation-system/#navigation-systems__no-global-positioning-system-gps-reception)
- «Navigation System - Voice Recognition Inoperative»(/cadillac/xlr/i-2003-2009/remont/navigation-system/#navigation-systems__navigation-system-voice-recognition-inoperative)
- For radio/audio related symptoms, refer to «Symptoms - Entertainment»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems__symptoms-entertainment) in Entertainment.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Navigation System Schematics DEFINITION: When using the navigation system, the global positioning system (GPS) icon does not appear on the navigation radio. | |||
| 1 | Did you perform Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Move the vehicle to an open area outside of the building. Turn ON the ignition. The Cadillac emblem screen appears on the navigation radio. Press the MAP button on the radio. When the navigation disclaimer screen appears, press the I AGREE button on the display. The display should show the current position of the vehicle. The GPS icon should appear on the upper left corner of the screen, indicating that the navigation system has proper GPS reception. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Remove the GPS antenna from its location on the Instrument Panel. Place the GPS antenna outside of the vehicle, connected to the navigation module, and positioned horizontally. Turn ON the ignition and turn on the navigation system. Does the GPS icon appear on the navigation radio? | Go to Step 4 | Go to Step 6 |
| 4 | Inspect the front window glass for tinting or any other alterations or obstructions. Is the front window glass OK? | Go to Step 6 | Go to Step 5 |
| 5 | Remove the front window glass tinting or other alterations. Did you complete the repair? | Go to Step 8 | |
| 6 | Replace the GPS antenna. Refer to Global Positioning System (GPS) Antenna Replacement . Did you complete the replacement? | Go to Step 8 | Go to Step 7 |
| 7 | Replace the navigation radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 8 | |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
No Global Positioning System (GPS) Reception
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Navigation System Schematics DEFINITION: The navigation voice recognition is inoperative. | |||
| 1 | Did you perform Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn ON the ignition. The Cadillac emblem screen appears on the navigation radio. Press the radio MENU button on the radio. When the navigation disclaimer screen appears, press the I AGREE button on the display. Press the MAP button on the radio. The display should show the current position of the vehicle. The navigation map should be clear and have clear color. Press the voice switch on the steering wheel. Speak a valid voice command. The system should repeat your command and then perform the function. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Test the following circuits for an open, short to ground, or a short to voltage: The cellular microphone signal circuit The drain wire Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the navigation radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the navigation radio. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 6 | |
| 6 | Operate the system to verify the repair. Does the system operate properly? | System OK | Go to Step 3 |
Navigation System - Voice Recognition Inoperative
The navigation display module is serviced as part of the radio. Refer to Radio Replacement .
- Remove the instrument panel (I/P) trim pad. Refer to «Instrument Panel Trim Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
- Remove 2 plastic rivet retainers which secure the global positioning system (GPS) antenna to the I/P carrier.
- Remove the radio. Refer to «Radio Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) in Entertainment.
- Remove the GPS antenna from the retaining clip at the rear of the radio.
- Remove the GPS antenna loop lead from the HVAC duct work.
- Route the GPS antenna with the coaxial antenna lead from the I/P carrier.
- Install the GPS antenna and the coaxial lead to the I/P carrier and route the coaxial lead to the radio.
- Install the GPS antenna loop lead to the HVAC duct work.
- Install the GPS antenna to the retaining clip at the rear of the radio.
- Install the radio. Refer to «Radio Replacement»(/cadillac/xlr/i-2003-2009/remont/entertainment-systems/#entertainment-systems) in Entertainment.
- Install 2 plastic rivets to secure the GPS antenna to the I/P carrier.
- Install the I/P trim pad. Refer to «Instrument Panel Trim Pad Replacement»(/cadillac/xlr/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
| Controls | US | Export |
|---|---|---|
| Band | Changes between AM/FM1/FM2/WX | |
| CD | Displays the CD control screen | |
| DVD | Displays the DVD control screen | Changes to TV mode |
| Tune/Seek | Allows the system to tune to the next pre-programmed station or to seek stations in the area | |
| Adjust | Displays the audio adjust screen | Displays the audio/TV adjust screen |
| Repeat | Press to repeat the last navigation voice prompt | |
| Map | Press to display the map | |
| Route | Initiates the route planning routine | |
| Setup | Press to change the system settings | |
| Tilt | Press and hold to tilt the screen for access to the DVD | Press and release to tilt the screen for access to the DVD. Momentarily depress to tilt display screen for better viewing (Japan only). |
Navigation System Description and Operation
The navigation system contains the following components
- Navigation Radio
- Global positioning system (GPS) antenna
The export navigation system contains the following additional components
- Vehicle information communication system (VICS) microprocessor card
- VICS optical/microwave beacon antenna
- VICS FM antenna integrated on the rear decklid
The navigation radio, mounted in the center of the instrument panel, is the operator interface for the navigation system. Data is input from the operator to the navigation system via the navigation radio buttons and the display touch screen. The navigation radio also provides the following
- Displays navigation, audio, TV and system information on the touch screen.
- Soft keys are displayed on the touch screen for selection of menus and functions to operate the navigation system and the audio system.
- Displays the navigation map with routing information on the touch screen.
- Provides verbal guidance to the operator.
The GPS system collects position information for GPS satellites in orbit around the earth. Initial vehicle position is determined by the comparison of the signals received from multiple GPS satellites. The GPS antenna must have a clear unobstructed view of the sky and receive signals from three or more GPS satellites to display accurate position information. Current position is displayed on the navigation display touch screen as a carat. The vehicle speed signal received from the BCM and accelerometers in the navigation radio are used to continuously change the position of the vehicle as the vehicle is driven. The GPS system will continuously update ensure the correct position is shown.
The vehicle information communication system (VICS) card, an export only dealer-installed option, is installed inside the navigation radio. The VICS card uses signals from the optical/microwave beacon antenna and the VICS antenna via the TV antenna module to convey routing information to the navigation radio. The navigation radio either revises planned routing or relays the VICS information to the operator through the screen of the navigation radio and the voice guidance system.
The navigation system can utilize voice commands from the operator to control many functions of the radio. The voice recognition microphone is located above rear view mirror. In domestic vehicles this microphone is shared with the OnStar system. The microphone signal is then routed to the OnStar Voice Communication Interface Module (VCIM) then to the navigation radio where the signal is processed and the command is performed. In export vehicle the signal from the microphone is routed directly to the navigation radio. For a complete list of all available voice commands refer to the navigation supplement.
See also:
• Diagnostic System Check - Vehicle
• Symptoms - Instrument Panel, Gages and Console
• Circuit Testing
• Wiring Repairs
• Testing for Intermittent Conditions and Poor Connections
• Connector Repairs
• Control Module References
• Checking Aftermarket Accessories
• Symptoms - Entertainment
• Radio Replacement
• DTC B0001
• Navigation System Description and Operation
• No Global Positioning System (GPS) Reception
• Navigation System - Voice Recognition Inoperative