Problem Symptoms Table

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

General

PROBLEM SYMPTOMS CHART - GENERAL

Symptom	Suspected Area	See Reference
System does not operate at all (self-check function does not operate)	Clearance Warning ECU Power Source Circuit	CLEARANCE WARNING ECU POWER SOURCE CIRCUIT
	Clearance Sonar Main Switch Circuit	CLEARANCE SONAR MAIN SWITCH CIRCUIT
	Clearance Warning ECU	CLEARANCE WARNING ECU
ECU does not operate when clearance sonar main switch is turned on or off	Clearance Sonar Main Switch Circuit	CLEARANCE SONAR MAIN SWITCH CIRCUIT
	Read value using the Techstream (EEPROM status)	DTC CHECK/CLEAR
	Clearance Warning ECU	CLEARANCE WARNING ECU

Sonar Function

PROBLEM SYMPTOMS CHART - SONAR FUNCTION

Symptom	Suspected Area	See Reference
Freeze condition is displayed as a result of self-check	Remove ice, mud or snow from the ultrasonic sensor	-
Open circuit in front sensors is displayed as a result of self-check	Front Left Sensor Malfunction	DTC C1AE1 FRONT LEFT SENSOR MALFUNCTION
	Front Right Sensor Malfunction	DTC C1AE4 FRONT RIGHT SENSOR MALFUNCTION
	Clearance Warning ECU	CLEARANCE WARNING ECU
Open circuit in rear sensors is displayed as a result of self-check	Rear Left Sensor Malfunction	DTC C1AE6 REAR LEFT SENSOR MALFUNCTION
	Rear Right Sensor Malfunction	DTC C1AE9 REAR RIGHT SENSOR MALFUNCTION
	Rear Left Center Sensor Malfunction	DTC C1AE7 REAR LEFT CENTER SENSOR MALFUNCTION
	Rear Right Center Sensor Malfunction	DTC C1AE8 REAR RIGHT CENTER SENSOR MALFUNCTION
	Clearance Warning ECU	CLEARANCE WARNING ECU
Detection operation operates even when vehicle speed is more than 13 km/h (8 mph)	CAN Communication System	CAN COMMUNICATION SYSTEM
	Clearance Warning ECU	CLEARANCE WARNING ECU

Display Function

PROBLEM SYMPTOMS CHART - DISPLAY FUNCTION

Symptom	Suspected Area	See Reference
Detection operation is normal but sonar displays do not appear on multi-information display	CAN communication system	CAN COMMUNICATION SYSTEM
	Clearance Warning ECU	CLEARANCE WARNING ECU
	Combination Meter	REMOVAL
Detection operation is normal but sonar displays do not appear on multi-display	CAN Communication System	CAN COMMUNICATION SYSTEM
	Clearance Warning ECU	CLEARANCE WARNING ECU
	Multi-display	REMOVAL
Detection operation is normal but clearance sonar main switch indicator does not illuminate	Clearance Sonar Main Switch Circuit	CLEARANCE SONAR MAIN SWITCH CIRCUIT
	Clearance Warning ECU	CLEARANCE WARNING ECU

Buzzer Function

PROBLEM SYMPTOMS CHART - BUZZER FUNCTION

Symptom	Suspected Area	See Reference
Detection operation is normal but buzzer operation is intermittent	Clearance Warning Buzzer Circuit	CLEARANCE WARNING BUZZER CIRCUIT
	Clearance Warning ECU	CLEARANCE WARNING ECU