Toyota CH-R Service Manual: Open in Ion Generator Circuit (B14B9)

DESCRIPTION

The ion generator sub-assembly operates when both the ion generator switch and the blower switch are on. The air conditioning amplifier assembly sends a drive signal to the ion generator sub-assembly. When the ion generator sub-assembly receives the drive signal and starts to operate, it outputs an operation condition signal to the air conditioning amplifier assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B14B9	Open in Ion Generator Circuit	Open in ion generator sub-assembly circuit	Harness or connector between ion generator sub-assembly and power source circuit Harness or connector between ion generator sub-assembly and body ground Harness or connector between ion generator sub-assembly and air conditioning amplifier assembly Ion generator sub-assembly Air conditioning amplifier assembly	Memorized (12 seconds or more)*

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (ION GENERATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Air Conditioner > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Ion Generator	Ion generator sub-assembly	OFF or ON	-

Body Electrical > Air Conditioner > Active Test

Tester Display
Ion Generator

OK:

Ion generator sub-assembly operates normally.

Result	Proceed to
NG	A
OK (When troubleshooting according to Problem Symptoms Table)	B
OK (When troubleshooting according to the DTC)	C

B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 6

A

2.	CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - POWER SOURCE)

(a) Disconnect the ion generator sub-assembly connector.

*a Front view of wire harness connector (to Ion Generator Sub-assembly)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
G2-1 (IG) -Body ground	Ignition switch ON	11 to 14 V
G2-1 (IG) -Body ground	Ignition switch off	Below 1 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G2-4 (GND) - Body ground	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the F72 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F72-17 (NAIN) - G2-3 (IG+)	Always	Below 1 Ω
F72-37 (NANO) - G2-2 (PCL)	Always	Below 1 Ω
F72-17 (NAIN) or G2-3 (IG+) - Body ground	Always	10 kΩ or higher
F72-37 (NANO) or G2-2 (PCL) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.	CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY COMMUNICATION POWER SUPPLY

(a) Reconnect the F72 air conditioning amplifier assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
G2-3 (IG+) - Body ground	Ignition Switch ON Blower switch off	3.5 to 5 V

NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

OK

5.	CHECK ION GENERATOR SUB-ASSEMBLY OUTPUT

(a) Reconnect the G2 ion generator sub-assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

*a

Component with harness connected (Air Conditioning Amplifier Assembly)

-

-

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F72-17 (NAIN) - Body ground	Ignition Switch ON Blower switch Lo	Below 2 V

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE ION GENERATOR SUB-ASSEMBLY

6.	CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Air Conditioner > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Air Conditioner > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY