No Start Gauges Inop Warning Messages Cannot Remove Key - keywords B1370 fuse lan lock low P1629 U0241 U0140 U0151 U0155 U0159 U0164 U0168 U0170 U0184 U0186 U0194 U0198 U0199 U0200 U0209 U0214
| Subject: | No Start, Gauges Inop, Warning Messages, Cannot Remove Key |
| Models: | 2006- 2007 Buick Lucerne and Cadillac DTS |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A customer may comment about one or more of the following concerns. These concerns may be intermittent:
| • | No start |
| • | Instrument Panel Gauges, Radio, or HVAC Controls are inoperative |
| • | Warning Messages/ Indicators for the Tire Pressure Monitor, Stabilitrak, Traction Control, and or Supplemental Inflatable Restraint systems. |
| • | They cannot remove the key from the ignition |
The Diagnostic System Check may reveal one or more of the following clues:
| • | The F48 IGN SWITCH, F31 I/P HARN MDL, or F40 SHFTR SOL fuse located in the Rear Fuse Block is open. |
| • | Tech 2 will not communicate with the Low GMLAN Data Line. |
| • | The presence of DTC one or more of the following DTC: |
U0140 | Lost Communication With Body Control Module (BCM) |
U0151 | Lost Communication With Sensing and Diagnostic Module (SDM) |
U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module |
U0159 | Lost Communication With Parking Assist Control Module A |
U0164 | Lost Communication With HVAC Control Module |
U0168 | Lost Communication With Vehicle Theft Deterrent (VTD) Control Module |
U0170 | Lost Communication With Passenger Presence System (PPS) |
U0184 | Lost Communication With Radio |
U0186 | Lost Communication With Audio Amplifier |
U0194 | Lost Communication With Digital Radio Receiver (DRR) |
U0198 | Lost Communication With Communication Interface Module (OnStar®) |
U0199 | Lost Communication With Door control Module A |
U0200 | Lost Communication With Door control Module B |
U0209 | Lost Communication With Heated Seat Module (HSM) |
U0214 | Lost Communication With Remote Function Actuator (RFA) |
U0241 | Lost Communication With Headlamp Control Module A |
P1629 | Theft Deterrent Fuel Enable Signal Not Received |
B1370 | Device Ignition 1 ON and START Circuit |
Recommendation/Instructions:
Inspect the Body Wire Harness (1) for cuts and chafes from being pressed against the Instrument Panel Carrier (2) when the driver side Instrument Panel Insulator Panel is installed. The area is located near C203 I/P Harness to the Steering Column Harness (3) and over the Brake Pedal Assembly (4).
Note: The harness will relax and fall away from the Instrument Panel Carrier when the Instrument Panel Insulator Panel is removed.
The following circuits are in this bundle and have the potential to be damaged:
Buick Lucerne
2640 | Battery Positive Voltage |
1840 | Battery Positive Voltage |
41 | Ignition 1 Voltage |
350 | Ground |
556 | Steering Wheel Position Sensor Low Reference (LD8/JL4) |
1056 | Steering Wheel Position Sensor 5-Volt Reference (LD8/JL4) |
1381 | LCD Dimming Signal |
1763 | Steering Wheel Position Signal A (LD8/JL4) |
1764 | Steering Wheel Position Signal B (LD8/JL4) |
5060 | Low Speed GMLAN Serial Data |
5905 | Ignition Lock Cylinder Solenoid Control (A51) |
Cadillac DTS
41 | Ignition 3 Voltage (NR7/N57/N30/N50) |
350 | Ground |
556 | Steering Wheel Position Sensor Low Reference (JL4) |
782 | Memory Seat/Mirror Sensor Low Reference (N37) |
788 | Memory Mirror Position Sensor 5-Volt Reference (N37/A45) |
1056 | Steering Wheel Position Sensor 5-Volt Reference (JL4) |
1381 | LCD Dimming Signal |
1763 | Steering Wheel Position Signal A (JL4) |
1764 | Steering Wheel Position Signal B (JL4) |
1840 | Battery Positive Voltage |
2094 | Steering Column Tilt and Telescope Forward Switch Signal (N37) |
2095 | Steering Column Tilt and Telescope Reverse Switch Signal (N37) |
2096 | Steering Column Tilt and Telescope Up Switch Signal (N37) |
2097 | Steering Column Tilt and Telescope Down Switch Signal (N37) |
2098 | Steering Column Telescope Motor Forward (N37) |
2110 | Steering Column Telescope Motor Rearward (N37) |
2111 | Steering Column Tilt Motor Up Control (N37) |
2112 | Steering Column Tilt Motor Down Control (N37) |
2153 | Steering Column Telescope Motor Signal (N37) |
2154 | Steering Column Tilt Motor Signal (N37) |
2640 | Battery Positive Voltage |
5060 | Low Speed GMLAN Serial Data |
5905 | Ignition Lock Cylinder Solenoid Control (AQ9) |
5979 | Memory Seat Switch High Reference (N37) |
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.
