No.4 DOES NOT AUTO CLOSE [POWER LIFTGATE (PLG) SYSTEM]

id0903c9855400

4 | Does not auto close
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DESCRIPTION | • Liftgate does not operate auto close. • PLG buzzer does not sound when the PLG front switch, PLG rear switch and/or transmitter is operated. • Hazard warning light does not flash when the PLG front switch, PLG rear switch and/or keyless switch is operated.
POSSIBLE CAUSE | • PLG control module does not receive auto close trigger signal ― Malfunction in PLG front switch related part • PLG front switch malfunction • Open or short to POWER/ground circuit in wiring harness between PLG front switch and PLG control module ― Malfunction in PLG rear switch related part ― Malfunction in keyless entry system • PLG control module malfunction

When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, verify that the connectors, terminals and wiring harnesses are connected correctly and undamaged.

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT POWER DOOR LOCK SYSTEM • Inspect the power door lock system operation. • Does the power door lock operate properly? | Yes | Go to the next step.
No | Repair or replace malfunctioning part.
2 | INSPECT PLG FRONT SWITCH • Inspect the PLG front switch. (See POWER LIFTGATE (PLG) FRONT SWITCH INSPECTION.) • Is the PLG front switch normal? | Yes | Go to the next step.
No | Replace the PLG front switch. (See POWER LIFTGATE (PLG) FRONT SWITCH REMOVAL/INSTALLATION.)
3* | INSPECT WIRING HARNESS BETWEEN PLG FRONT SWITCH AND PLG CONTROL MODULE • Turn the ignition switch to OFF position. • Disconnect the PLG front switch and PLG control module connectors. • Inspect for open or short to ground circuit between PLG front switch terminal G and PLG control module terminal 3R. • Inspect for open or short to POWER/ground circuit between PLG front switch terminal C (L.H.D), I (R.H.D) and PLG control module terminal 3Q. • Is the open or short to POWER/ground circuit detected? | Yes | Repair or replace malfunctioning part.
No | Go to the next step.
4 | INSPECT PLG REAR SWITCH • Inspect the PLG rear switch. (See POWER LIFTGATE (PLG) REAR SWITCH INSPECTION.) • Is the PLG rear switch normal? | Yes | Go to the next step.
No | Replace the PLG rear switch. (See POWER LIFTGATE (PLG) REAR SWITCH REMOVAL/INSTALLATION.)
5* | INSPECT WIRING HARNESS BETWEEN PLG REAR SWITCH AND PLG CONTROL MODULE • Turn the ignition switch to OFF position. • Disconnect the PLG rear switch and the PLG control module connectors. • Inspect for open or short to ground circuit between PLG rear switch terminal C and PLG control module terminal 3R. • Inspect for open or short to POWER/ground circuit between PLG rear switch terminal D and PLG control module terminal 2B. • Is the open or short to POWER/ground circuit detected? | Yes | Repair or replace malfunctioning part.
No | Replace the PLG control module. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)