No.1 SYSTEM DOES NOT OPERATE [PARKING SENSOR]

id0903z4886500

1 | System does not operate
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DESCRIPTION | Buzzer does not sound and indicator light does not illuminate after ignition is switched ON.
POSSIBLE CAUSES | • Parking sensor control module power supply related malfunction ― Short to ground in the wiring harness between BCM terminals 7B and parking sensor switch terminal 1K (without parking sensor switch) ― BCM malfunction (without parking sensor switch) ― Short to ground in the wiring harness between ignition switch terminals C and parking sensor switch terminal F (with parking sensor switch) ― Parking sensor switch malfunction (with parking sensor switch) ― Short to ground in the wiring harness between parking sensor switch terminals H and parking sensor control module terminal 1K (with parking sensor switch) • 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 signal malfunction ― Open or short circuit in wiring harness between transaxle range (TR) switch and parking sensor control module ― Open or short circuit in wiring harness between transaxle range (TR) switch and BCM ― Open or short circuit in wiring harness between transaxle range (TR) switch and back-up light ― Transaxle range (TR) switch malfunction • Parking sensor control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY MALFUNCTION SYMPTOM • Set up the vehicle according to the following conditions: ― Turn the ignition switch to the ON position. ― R position ― Parking sensor switch ON (indicator on) (with parking sensor switch) • Do the parking sensor buzzer for the emit sound? | Yes | Activate the parking sensor buzzer: • System is normal
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.
No | • Inspect and repair for the following short circuits: ― Between ignition switch terminals C and parking sensor switch terminal 1K (with parking sensor switch) ― Between ignition switch terminals C and BCM terminal 4A (without parking sensor switch) ― 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 OFF position. • Disconnect the parking sensor control module connector. • Turn the ignition switch to the ON position. • Parking sensor switch ON (indicator on). (with parking sensor switch) • 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 step 6.
No | With parking sensor switch • Go to the next step. Without parking sensor switch • Go to the step 5.
4 | INSPECT PARKING SENSOR SWITCH • Inspect the parking sensor switch. (See PARKING SENSOR SWITCH/INDICATOR INSPECTION.) • Is the parking sensor switch normal? | Yes | Inspect and repair for the following short circuits: • Between parking sensor switch terminal H and parking sensor control module terminal 1K.
No | Replace the parking sensor switch. (See PARKING SENSOR SWITCH/INDICATOR REMOVAL/INSTALLATION.)
5 | INSPECT BCM • Inspect the BCM. (See BODY CONTROL MODULE (BCM) INSPECTION.) • Is the BCM normal? | Yes | Inspect and repair for the following short circuits: • Between BCM terminal 7B and parking sensor control module terminal 1K.
No | Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
6 | VERIFY IF MALFUNCTION CAUSE IS R POSITION 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.)
No | Go to the next step.
7 | INSPECT TRANSAXLE RANGE (TR) SWITCH • Inspect the transaxle range (TR) switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [AY6A-EL, AY6AX-EL].) • Is the transaxle range (TR) switch normal? | Yes | Inspect and repair for open or short circuit at followings: • Between transaxle range (TR) switch and parking sensor control module terminal 1F. • Between transaxle range (TR) switch and BCM. • Between transaxle range (TR) switch and back-up light. If the wiring harnesses are normal, replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No | Replace the transaxle range (TR) switch. (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)