For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
DTC Descriptor
DTC B1529 00: Device Voltage Reference Output 5 Below/Above ThresholdCircuit/System Description
The body control module (BCM) provides a 5-volt reference voltage to the cruise control switch and the touch up touch down (TUTD) selector for the transmission.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The cruise switch is ON. |
Conditions for Setting the DTC
| • | The BCM detects an invalid voltage signal on the cruise control/TUTD switch signal circuit. |
| • | The above condition is present for 0.5 second. |
Action Taken When the DTC Sets
The BCM stores the DTC information into memory when the diagnostic runs and fails.
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | A history DTC clears after 40 fault-free ignition cycles. |
| • | The DTC can be cleared using a scan tool. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Verify that no other DTCs are not set.
- Ignition OFF, disconnect the harness connector at the TUTD selector.
- Ignition ON, Connect a DMM between the reference circuit terminal of the TUTD harness connector and a known ground.
| ⇒ | If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle |
| ⇒ | If the DMM does not read 5 volts test the reference circuit for a open/high resistance or short to ground. |
| ⇒ | If all circuits test normal replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification .
