For 1990-2009 cars

# Information OnStar Vehicles Unable To Receive Turn By Turn Directions - keywords calibration GPS navigation location radio route voice

Subject: | Information OnStar vehicles unable to receive Turn by Turn directions

Models: | All OnStar Gen 7 and Gen 8 equipped vehicles

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

OnStar Center is unable to provide Turn by Turn services

### Recommendation/Instructions:

Turn by Turn inop Diagnostic information:

Turn by Turn feature only available on Gen 7 or higher VCIM

OnStar system must be activated and configured in order to have Turn by Turn services.

Vehicle must have Anti-Lock Brakes System to have Turn by Turn feature.

Vehicle must be in a cellular market that supports Turn by Turn, Packet Data market.

Vehicle must be able to get a GPS location.

Verify no DTCs are present in vehicle ABS and VCIM.

The following information is to be retrieved with the Tech 2 before calling General Motors

Technical Assistance.

Module ID 2

8 Digit GM part number:

Electronic Serial Number:

VCI Module Station ID:

Module ID:

Data Display

Signal Strength:

Signal Type:

Trans ID:

Cellular Information

Call mode:

Current System ID:

Digital Home NID:

Digital Home SID:

PRL Outdated Status:

PRL Version Number:

Off Board Navigation (Gen 7):

Network Access:

Username:

Program Phone Number

MIN:

MDN:

Perform an outbound and inbound OnStar personal call:

Results:

Perform an OnStar key press:

Results:

Can the vehicle receive a call? Make an inbound call to the Vehicle:

Results:

Vehicle must be driven 5-10 miles with an open sky condition to calibrate Dead Reckoning for Turn by Turn, Tech 2 OBN flag will read YES when calibrated.

Perform an OnStar blue button press, ask the adviser for a Turn by Turn route. Is the adviser able to give TBT route?

Making an outgoing call and one incoming call to and from the vehicle, (this helps with any cellular diagnostic that may preformed by the cellular carrier).

If normal Diagnostic does not lead to a resolution contact GM Technical Assistance.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.