Circuit Description
The body control module (BCM) supplies voltage to the auto trans shift lock control output when the following conditions occur:
| • | The ignition switch is in RUN. |
| • | The transaxle is in the PARK position. |
While the brake pedal is pressed, the following functions occur:
| • | The stoplamp/auto trans shift lock control switch opens the auto trans shift lock control circuit. |
| • | The shift auto trans shift lock control solenoid is disabled. |
The BCM monitors the output. The BCM determines the actual voltage of the auto trans shift lock control circuit every 0.3 seconds.
Conditions for Setting the DTC
| • | The BCM detects a short to voltage in auto trans shift lock control circuit. |
| • | The condition is present for more than 0.1 seconds. |
Action Taken When the DTC Sets
| • | DTC B0803 stores in the BCM memory. |
| • | No driver warning message displays. |
Conditions for Clearing the DTC
| • | The BCM no longer detects a short to voltage. |
| • | A history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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Listen for an audible click when the auto trans shift lock control solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
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Verifies that the Body Control Module (BCM) is providing voltage to the auto trans shift lock control solenoid.
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Tests for an open in the ground circuit to the auto trans shift lock control solenoid.
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Tests if voltage is constantly being applied to the auto trans shift lock control solenoid.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Auto Trans Shift Lock Control System Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Automatic Transmission Shift Lock Control |
Does the auto trans shift lock control solenoid turn ON and OFF with each command? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. | Go to Step 3 | |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 4 | Go to Step 5 | |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 8 | Go to Step 10 | |
Does the test lamp remain illuminated with each command? | -- | Go to Step 7 | Go to Step 6 | |
6 | Test the control circuit of the auto trans shift lock control solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 9 |
7 | Test the control circuit of the auto trans shift lock control solenoid for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 9 |
8 | Inspect for poor connections at the auto trans shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 11 |
9 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 12 |
10 | Repair the ground circuit of the auto trans shift lock control solenoid. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 13 | -- |
11 | Replace the auto trans shift lock control solenoid. Refer to Automatic Transmission Shift Lock Control Disassemble - Off Vehicle and Automatic Transmission Shift Lock Control Assemble - Off Vehicle in Steering. Did you complete the replacement? | -- | Go to Step 13 | -- |
12 |
Important: After replacement of the BCM perform the set up BCM procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 13 | -- |
13 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
