No Crank Or Multiple Warning Telltales On
| Subject: | No Crank Or Multiple Warning Telltales On |
| Models: | 2008 Cadillac CTS w/ Automatic Transmission |
| 2007-2008 Cadillac SRX w/ 6-Speed Transmission |
| 2006-2007 Cadillac STS w/ 6-Speed Transmission |
| 2008 Cadillac STS |
| 2006-2008 Cadillac STS-V |
This PI was superseded to update models and to update the customer concern. Please discard PIC4740.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment about one or more of the following concerns.
| • | The vehicle will not crank over and start. |
| • | Multiple warning telltales illuminate |
| • | The transmission shifts hard |
| • | The door locks cycle while driving |
The diagnostic system check may reveal one or more of the DTC listed below are stored. The transmission control module (TCM) or engine control module (ECM) may not communicate with the scan tool. The cause may be unseated pins in the transmission connector.
C0242 | ECM Indicated TCS Malfunction |
C0561 | System Disabled Information Stored |
P0575 | Cruise Control Switch Signal Circuit |
P0615 | Starter Relay Control Circuit |
P0700 | Transmission Control Module (TCM) Requested MIL Illumination |
P0856 | Traction Control Torque Request Circuit |
P1629 | Theft Deterrent Fuel Enable Signal Not Received |
P2544 | Transmission Torque Request Circuit |
U0073 | Controller Area Network (CAN) Bus Communication |
U0100 | Lost Communication With ECM/PCM |
U0101 | Lost Communication With TCM |
U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module |
U0140 | Lost Communication With Body Control Module |
U2100 | Controller Area Network (CAN) Bus Communication |
U2105 | Lost Communication With Engine Control Module (ECM) |
U2106 | Lost Communication With Transmission Control Module (TCM) |
Recommendation/Instructions:
Inspect the transmission connector terminal connections. Disconnect the connector and carefully tug on each wire to ensure the pins are fully seated. A side load on the wires may cause a false positive lock. Repair the connections as necessary.
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.
