No.1 SYSTEM DOES NOT OPERATE [PARKING SENSOR]

id0903z4886500

1

System does not operate

DESCRIPTION

Buzzer does not sound after ignition is switched ON.

POSSIBLE CAUSES

•  Parking sensor control module power supply related malfunction

―  Short to ground in the wiring harness between ignition switch terminals D and parking sensor control module terminal 1K

•  Ground related malfunction in parking sensor control module

―  Short circuit between parking sensor control module terminal 1L and body ground

―  Ground point lifting, looseness

•  R position (ATX/CVT), reverse (MTX) signal malfunction

―  Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and parking sensor control module

―  Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and BCM

―  Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and back-up light

―  Transaxle range (TR) switch malfunction (ATX/CVT)

―  Back-up light switch malfunction (MTX)

•  Parking sensor control module malfunction

1	System does not operate
DESCRIPTION	Buzzer does not sound after ignition is switched ON.
POSSIBLE CAUSES	• Parking sensor control module power supply related malfunction ― Short to ground in the wiring harness between ignition switch terminals D and parking sensor control module terminal 1K • Ground related malfunction in parking sensor control module ― Short circuit between parking sensor control module terminal 1L and body ground ― Ground point lifting, looseness • R position (ATX/CVT), reverse (MTX) signal malfunction ― Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and parking sensor control module ― Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and BCM ― Open or short circuit in wiring harness between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and back-up light ― Transaxle range (TR) switch malfunction (ATX/CVT) ― Back-up light switch malfunction (MTX) • Parking sensor control module malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY MALFUNCTION SYMPTOM • Set up the vehicle according to the following conditions: ― Turn the ignition switch to the ON position. ― R position (ATX/CVT) ― Reverse gear (MTX) • Do the parking sensor buzzer for the emit sound?	Yes	Activate the parking sensor buzzer: • System is normal
1		No	Go to the next step.
2	VERIFY IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY WIRING HARNESS • Verify the condition of the METER (10 A) fuse. • Is the fuse normal?	Yes	Go to the next step.
2		No	• Inspect and repair for the following short circuits: ― Between ignition switch terminals D and parking sensor control module terminal 1K ― Between METER (10 A) and each part receiving power supply • After repair, replace the fuse.
3	INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT TO POWER SUPPLY RELATED WIRING HARNESS • Turn the ignition switch to the LOCK position. • Disconnect the parking sensor control module connector. • Turn the ignition switch to the ON position. • Measure the voltage of connector terminal 1K on the parking sensor control module vehicle wiring harness side. • Is the voltage B+?	Yes	Go to the next step.
3		No	Repair the short circuit in the wiring harness between ignition switch terminals D and parking sensor control module terminal 1K.
4	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN PARKING SENSOR CONTROL MODULE GROUND CIRCUIT • Leave the parking sensor control module connector disconnected. • Verify if there is continuity between the parking sensor control module vehicle side connector terminal 1L and body ground. • Is there continuity?	Yes	Go to the next step.
4		No	Repair the open circuit in the wiring harness. Verify the connection condition of the ground point, and repair.
5	VERIFY IF MALFUNCTION CAUSE IS R POSITION (ATX/CVT), REVERSE (MTX) SIGNAL • Turn the ignition switch to the ON position. • Measure the voltage of parking sensor control module terminal 1F. (See PARKING SENSOR CONTROL MODULE INSPECTION.) • Is the voltage normal?	Yes	Replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
5		No	Go to the next step.
6	INSPECT TRANSAXLE RANGE (TR) SWITCH (ATX/CVT)/BACK-UP LIGHT SWITCH (MTX) • Inspect the transaxle range (TR) switch (ATX/CVT)/Back-up light switch (MTX). (See BACK-UP LIGHT SWITCH INSPECTION.) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FN4A-EL].) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [DJVA-EL].) • Is the transaxle range (TR) switch (ATX/CVT)/Back-up light switch (MTX) normal?	Yes	Inspect and repair for open or short circuit at followings: • Between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and parking sensor control module terminal 1F. • Between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and BCM. • Between transaxle range (TR) switch (ATX/CVT)/back-up light switch (MTX) and back-up light. If the wiring harnesses are normal, replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
6		No	Replace the back-up light switch (MTX)/transaxle range (TR) switch (ATX/CVT). (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [F35M-R].) (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [B65M-R].) (See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FN4A-EL].) (See TRANSAXLE RANGE (TR) SWITCH INSTALLATION [FN4A-EL].) (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION [DJVA-EL].)