Transmission Control Lever Malfunction
Diagnostic Instructions
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Control
|
1
|
1
|
2
|
-
|
Ground
|
-
|
1
|
-
|
-
|
|
1. |
Transmission shift control lever will not move
from PARK with the brake pedal applied. |
|
2. |
Transmission shift control lever will move from
PARK without the brake pedal applied. |
|
|
|
Circuit/System Description
The body control module (BCM) 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.
Reference Information
Schematic Reference
Shift Lock Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Automatic Transmission Shift Lock Control Description and
Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
2. |
Verify the scan tool Brake
Transmission Shift Interlock Solenoid Actuator Command parameter
changes from Inactive to Active when the brake pedal is
applied. |
⇒ 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
3. |
Verify the S3 transmission
shift lever moves out of the PARK position when the brake pedal is
applied. |
⇒ 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.
Circuit/System Testing
1. |
Ignition OFF and all vehicle
systems OFF, disconnect the harness connector at the S3
transmission shift lever. It may take up to 2 minutes for all
vehicle systems to power down. |
2. |
Test for less than 10 Ω
between the ground circuit terminal 2 and ground. |
⇒ If 10 Ω or
greater
|
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
3. |
Ignition ON, connect a test
lamp between the control circuit terminal 4 and the ground circuit
terminal 2. |
4. |
Verify the test lamp turns ON
and OFF when commanding the Brake Transmission Shift Interlock
Solenoid Actuator ON and OFF with a scan tool. |
⇒ 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. |
|
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. |
|
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
5. |
Test or replace the S3
transmission shift lever. |
Component Testing
Dynamic Test
1. |
Install a 10 A fused jumper
wire between the control terminal 4 and 12 V. Momentarily install a
jumper wire between the ground terminal 2 and ground. |
2. |
Verify the solenoid turns on
& off/clicks, etc. |
⇒ 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.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the repair.
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