Workshop Manual

7A1–44
TRANSMISSION CONTROL SYSTEM (4L30–E)
DTC P0719 Brake Switch Circuit Low (Stuck On)
Step Action Yes No
1 Was the Powertrain On–Board Diagnostic (OBD) System Check
performed?
Go to Step 2
Go to Powertrain
OBD System
Check
2 1. Install the scan tool.
2. With the engine “off,” turn the ignition switch to the “on”
position.
NOTE: Before clearing the DTC(s), use the scan tool in order to
record the “Failure Records” for reference. Using the “Clear Info”
function will erase the stored “Failure Records” from the PCM.
3. Record the “DTC Failure Records”, then clear the DTC(s).
4. Select “TCC Brake Switch” on the scan tool.
5. Disconnect the brake switch connector from the brake switch.
6. Connect a test lamp from cavity I31–3 of the brake switch
connector to a known good ground.
Is the test lamp ON?
Go to Step 3 Go to Step 4
3 Install a J 36169–A Fused Jumper Wire from terminal I31–2 to
terminal I31–3 of the brake switch connector.
Did the TCC Brake Switch status change from Open to Closed?
Go to Step 7 Go to Step 9
4 1. Remove the fuse “TURN, BACK UP”.
2. Inspect the fuse for an open.
Is the fuse open?
Go to Step 5 Go to Step 8
5 Inspect circuit WHT/GRN for a short to ground condition. Repair
the circuit if necessary.
Did you find a short to ground condition?
Go to Step 11 Go to Step 6
6 Inspect circuit BRN/RED for a short to ground condition. Repair
the circuit if necessary.
Did you find a short to ground condition?
Go to Step 11 Go to Step 10
7 Replace the brake switch.
Is the replacement complete?
Go to Step 11 —
8 Inspect circuit WHT/GRN for an open condition. Repair the circuit
if necessary.
Did you find and correct an open condition?
Go to Step 11 —
9 Inspect circuit BRN/RED for an open.
Did you find an open condition?
Go to Step 11 Go to Step 10
10 Replace the PCM.
Is the replacement complete?
Go to Step 11 —
11 In order to verify your repair, perform the following procedure:
1. Select DTC.
2. Select Clear Info.
3. With the engine “off,” turn the ignition switch to the “on”
position.
4. Do not depress the brake pedal.
5. Verify that the Brake Switch status indicates “Closed” (12
volts) for 2 seconds.
6. Select Specific DTC. Enter DTC P0719.
Has the test run and passed?
System OK
Begin the
diagnosis again.
Go to Step 1