Orlando |
||||||||
|
|
|
|||||||
| • | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Control | B270A 02, 1 | B270A 04, 1 | B270A 01, 2 | - |
Ground | -- | B270A 04, 1 | -- | -- |
| ||||
The body control module controls the transmission shift lock control solenoid actuator by providing a battery positive voltage to the solenoid when the brake pedal is applied. The BCM monitors the voltage and current flow of the control circuit.
| • | The ignition switch is in the ON position. |
| • | The brake pedal is pressed. |
| • | The transmission is in the PARK position. |
| • | The DTC runs continuously once the above conditions are met. |
The body control module detects a short to voltage in the transmission shift lock control solenoid actuator control circuit for 1 second.
The body control module detects a short to ground in the transmission shift lock control solenoid actuator control circuit for 1 second.
The body control module detects an open or short to voltage in the transmission shift lock control solenoid actuator control circuit for 1 second.
The body control module will not attempt to enable the voltage supply circuit of the transmission shift lock control solenoid actuator until the next key cycle.
| • | A current DTC B270A will clear when the malfunction is no longer present and the ignition switch is cycled. |
| • | A history DTC will clear after 100 ignition cycles with no current DTC active during the 100 ignition cycles. |
Automatic Transmission Shift Lock Control Description and Operation
Control Module References for scan tool information
If the Brake Transmission Shift Interlock Solenoid Actuator Command does not change
Refer to Stop Lamps Malfunction
If the Brake Transmission Shift Interlock Solenoid Actuator Command changes
If the the S3 transmission shift lever does not move out of the PARK position
Refer to Circuit/System Testing.
If the the S3 transmission shift lever does move out of the PARK position
All OK.
If 10 Ω or greater
| 2.1. | Ignition OFF. |
| 2.2. | Test for less than 2 Ω in the ground circuit end to end. |
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
If the test lamp is always OFF
| 4.1. | Ignition OFF, disconnect the harness connector at the K9 body control module. |
| 4.2. | Test for infinite resistance between the control circuit and ground. |
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
| 4.3. | Test for less than 2 Ω in the control circuit end to end. |
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω
| 4.4. | Ignition ON. |
| 4.5. | Verify a test lamp illuminates between each B+ and ignition circuit terminal at the control module harness connector. |
| ⇒ | If the test lamp does not illuminate, repair the circuit or fuse as necessary. |
| ⇒ | If the test lamp illuminates at each B+ and ignition circuit, replace the K9 body control module. |
If the test lamp is always ON
| 4.1. | Ignition OFF, disconnect the harness connector at the K9 body control module, ignition ON. |
| 4.2. | Test for less than 1 V between the control circuit and ground. |
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the K9 body control module.
If the test lamp turns ON and OFF
If the solenoid does not turn on & off/clicks, etc.
Replace the S3 transmission shift lever.
If the solenoid does turn on & off/clicks, etc.
Perform the Diagnostic Repair Verification after completing the repair.
| • | Control Module References for BCM replacement, programming, and setup. |
| © Copyright Chevrolet. All rights reserved |
