GMC Yukon 2000–2006
Common on this vehicle:
Possible causes
The documents say what to doOnly records name itThe size of a node, the width of a link and the numbers are records matching this search, not likelihoods.
FaultCrate・GMC Yukon 2000–2006・「LM7」, B2476
Candidate cause (the documents say what to do)
No response when the OnStar button is pressed (DTC B2476): button assembly test values
On 1998-2000 OnStar equipped vehicles there may be no response when the OnStar button is pressed.
The OnStar VS-3B buttons may not operate and the telltale LED may not flash after the OnStar Center button or Emergency button is pressed; a DTC B2476 may also be present.
How to tell
B2476
What to do
- With the ignition in the On position, check for 7-10 volts between pin E6 and E1; if there is no voltage and the wire at the terminal is not shorted to ground, replace the VIU.
- Back probe the blue VIU connector between terminals E4 and E1: there should be no voltage with the system on and no buttons pressed.
- Press and hold the Call Answer/End button: the voltage should be 0.33 volts +/- 10%.
- Press and hold the OnStar Services button: the voltage should be 1.3 volts +/- 10%.
- Press and hold the Emergency button: the voltage should be 2.2 volts +/- 10%.
- If the readings do not agree with the specified values, replace the button assembly; if it is a mirror mounted button assembly, replace the mirror.
Caution: In these cases use OnStar Diagnostic Table DT3 (OnStar Button Assembly Test), but the values given in step 7 of that test are incorrect.
What is needed
- Parts and materials
- VIU (if there is no voltage between pin E6 and E1 and the wire at the terminal is not shorted to ground)
- Button assembly (if the readings do not agree with the specified values; the mirror, for a mirror mounted button assembly)
- Labor time
- Not stated
- Special tools
- Not stated
- Scan tool
- Not stated
Only what the technical documents state. "Not stated" does not mean not needed.
In the records
No record states work done for this cause.
See the evidence (1 technical documents, 0 records)
Passages of the technical documents
The affected models include the 2000 GMC Yukon 2WD & 4WD and Yukon XL 2WD & 4WD.
2000 GMC Yukon 2WD & 4WD and Yukon XL 2WD & 4WD
General Motors 2000-09-01
On 1998-2000 OnStar equipped vehicles there may be no response when the OnStar button is pressed.
T h e re may not be a response when the OnStar button is p ressed on 1998-2000 OnStar equipped vehicles.
General Motors 2000-09-01
The OnStar VS-3B buttons may not operate and the telltale LED may not flash after the OnStar Center button or Emergency button is pressed; a DTC B2476 may also be present.
In addition, the OnStar VS-3B buttons may not operate and the telltale LED may not flash after the OnStar Center button or E m e rgency button is pressed. A DTC B2476 also may be pre- sent in the system.
General Motors 2000-09-01
With the ignition in the On position, check for 7-10 volts between pin E6 and E1; if there is no voltage and the wire at the terminal is not shorted to ground, replace the VIU.
1. Ignition in On position. 2. Check to ensure Voltage of 7- 10 Volts between Pin E6 and E1. If there is no voltage here and the wire at terminal E^ is not shorted to ground, Replace the VIU.
General Motors 2000-09-01
A cause or a result a complaint states is the owner’s view or what a dealer told them, not an established fact.
Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.