PRE-RELEASE
DTC P150C
| DTC P150C |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P150C
Transmission Control Module Engine Speed Request Circuit Signal Message Counter Incorrect
| Circuit/System Description |
To improve vehicle shift feel, the transmission control module (TCM) is constantly sending the engine control module (ECM) serial data messages with information regarding its request for modifying engine speed or torque. The ECM sets this code when it detects a discrepancy in the structure of this message causing its integrity to be questioned.
An intermittent fault in the controller area network (CAN) circuits will cause DTC P150C to set.
| Conditions for Running the DTC |
Engine is running.
| Conditions for Setting the DTC |
The ECM detects greater than 2 message count errors.
| Action Taken When the DTC Sets |
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The ECM disables engine speed and torque requests from TCM.
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DTC P150C is a type B DTC.
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| Conditions for Clearing the DTC |
DTC P150C is a type B DTC.
| Reference Information |
Description and Operation
Data Link Communications Description and Operation
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
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DTC P150C is an information dtc. Troubleshoot all other ECM fault codes before DTC P150C. See
Fault code (DTC) List - Car
.
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If there are no other ECM fault codes, diagnosis takes place by looking for a returning CAN-circuit fault. Go to
Diagnostic tool does not communicate with high-speed GMLAN-device
.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid valve assembly replacement, setup, and programming.
