Toyota CH-R Service Manual: Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

DESCRIPTION

This DTC is stored when items controlled by the air conditioning amplifier assembly cannot be customized via the navigation system vehicle customization screen.

HINT:

The air conditioning amplifier assembly controls the air conditioning system related items that are customizable via the navigation system vehicle customization screen.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B15F5	Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction	Air conditioning amplifier assembly vehicle setting processing malfunction	CAN communication system Air conditioning system Air conditioning amplifier assembly Radio and display receiver assembly

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
Click here
When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

OK:

CAN communication DTCs are not output.

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK AIR CONDITIONING SYSTEM

(a) Check if the air conditioning system is malfunctioning.

w/ Top-mounted air conditioner pressure sensor: Click here
w/ Side-mounted air conditioner pressure sensor: Click here

HINT:

Customization may not be possible depending on the malfunction in the air conditioning system.

OK:

No malfunctions are present in the air conditioning system.

Result	Proceed to
OK	A
NG (w/ Top-mounted air conditioner pressure sensor)	B
NG (w/ Side-mounted air conditioner pressure sensor)	C

GO TO AIR CONDITIONING SYSTEM

3.	CHECK CUSTOMIZE ITEMS

(a) Make a note of the customizable items for the air conditioning system.

HINT:

The items shown as customizable via the navigation system vehicle customization screen can also be changed using the Techstream. In the following step, the Techstream will be used.

(1) To match-up the items on the navigation system vehicle customization screen with the items on the Techstream, check the customize parameters list for the air conditioning system related items that can be customized via the navigation system vehicle customization screen.

Click here

(b) Using the Techstream, check that it is possible to change the settings of the customize parameters that are available for customization via the navigation system vehicle customization screen.

OK:

The items available for customization via the navigation system vehicle customization screen can be customized successfully using the Techstream.

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when decidi ...

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Navigation System DTC No. Detection Item Link B1324 Lost Communication with Meter ...

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