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Home >> Mazda >> 2023 >> CX-9 Signature >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Power Liftgate Control Module >> DTC B1455-13: Touch Sensor (RH) Circuit Malfunction [Power Liftgate (PLG) Control Module] >> Diagnostic Procedure
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Diagnostic Procedure

DTC B1455:13 [POWER LIFTGATE (PLG) CONTROL MODULE] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT POWER LIFTGATE (PLG) TOUCH SENSOR (RH) CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the negative battery terminal.

    (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

  • Disconnect the power liftgate (PLG) touch sensor (RH) connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
Yes Go to the next step.
No Repair or replace the connector, then go to Step 5.
2 INSPECT POWER LIFTGATE (PLG) CONTROL MODULE CONNECTOR CONDITION
  • Disconnect the power liftgate (PLG) control module connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
Yes Go to the next step.
No Repair or replace the connector, then go to Step 5.
3 INSPECT TOUCH SENSOR CIRCUIT FOR OPEN CIRCUIT
  • Verify that the power liftgate (PLG) touch sensor (RH) and power liftgate (PLG) control module connectors are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side):
    • Power liftgate (PLG) touch sensor (RH) terminal B-Power liftgate (PLG) control module terminal 1P
    • Power liftgate (PLG) touch sensor (RH) terminal A-Power liftgate (PLG) control module terminal 1M
  • Is there continuity?
Yes Go to the next step.
No Refer to appropriate wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Power liftgate (PLG) touch sensor (RH) terminal B-Power liftgate (PLG) control module terminal 1P
  • Power liftgate (PLG) touch sensor (RH) terminal A-Power liftgate (PLG) control module terminal 1M

If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to Step 5.
4 INSPECT POWER LIFTGATE (PLG) TOUCH SENSOR (RH)
  • Measure the voltage at the following terminals (wiring harness-side):
    • Power liftgate (PLG) control module terminal 1P
    • Power liftgate (PLG) control module terminal 1M
  • Is the voltage normal? (See POWER LIFTGATE (PLG) CONTROL MODULE INSPECTION .)
Yes Go to the next step.
No Replace the power liftgate (PLG) touch sensor (RH), then go to the next step.
(See POWER LIFTGATE (PLG) TOUCH SENSOR REMOVAL/INSTALLATION .)
5 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
6 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [POWER LIFTGATE (PLG) CONTROL MODULE] .)
No DTC troubleshooting completed.