DTC P15A3
Diagnostic Instructions
DTC Descriptor
| DTC P15A3 00: Stop/Start Select Switch Circuit
Signal Message Counter Incorrect |
Circuit/System Description
The engine control module (ECM) receives the Stop/Start switch
speed signal via CAN from the body control module (BCM).
Conditions for Running the DTC
| • |
The DTCs run continuously once
the above condition is met. |
Conditions for Setting the DTC
The ECM receives an invalid Stop/Start switch status serial data
message from the BCM.
Action Taken When the DTC Sets
DTC P15A3 00 is a Type C DTC.
Conditions for Clearing the DTC
DTC P15A3 00 is a Type C DTC.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
| 1. |
Ignition ON, verify that no
DTC is present in the BCM. |
| 2. |
Verify the ECM scan tool
Stop/Start Select Switch parameter changes between Yes and No while
pressing the Stop/Start switch. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the S48D Multifunction Switch 2 - Instrument
Panel. |
| 2. |
Test for less than 5 Ω
between the earth circuit terminal 2 and earth. |
| ⇒ |
If greater than the specified value, test the
ground circuit for an open/high resistance. |
| 3. |
Ignition ON, verify the ECM
scan tool Stop/Start Select Switch parameter is No. |
| ⇒ |
If not the specified value, test the signal
circuit terminal 7 for a short to ground. If the circuit tests
normal, replace the K9 Body Control Module. |
| 4. |
Install a 3 A fused jumper
wire between the signal circuit terminal 7 and ground. Verify the
ECM scan tool Stop/Start Select Switch parameter is Yes.
|
| ⇒ |
If not the specified value, test the signal
circuit for a short to voltage or an open/high resistance. If the
circuit tests normal, replace the K9 Body Control Module. |
| 5. |
If all circuits test normal,
replace the S48D Multifunction Switch 2 - Instrument Panel.
|
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
