Toyota Tundra (2015 year). Manual — part 2261

A

INSPECTION PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (AIR MIX SERVO MOTOR TARGET PULSE (for
Driver Side))

(a) Use the Data List to check if the servo motor is functioning properly.

Air Conditioner

TESTER DISPLAY

MEASUREMENT ITEM / RANGE

NORMAL

CONDITION

DIAGNOSTIC

NOTE

Air Mix Servo Targ

Pulse (D)

No. 1 damper servo sub-assembly (air mix damper

servo motor [for driver side]) target pulse /

Min.: 0, Max.: 255

MAX. COLD: 5

(pulse)

MAX. HOT: 104

(pulse)

-

OK:

The display is as specified in the normal condition.

Result

RESULT

PROCEED TO

OK (Checking from the DTC)

A

OK (Checking from the PROBLEM SYMPTOMS TABLE)

B

NG

C

B

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN

PROBLEM SYMPTOMS TABLE

C

REPLACE AIR CONDITIONING AMPLIFIER

2.

REPLACE NO. 1 DAMPER SERVO SUB-ASSEMBLY (AIR MIX SERVO MOTOR [for
Driver Side])

(a) Temporarily replace the No. 1 damper servo sub-assembly (air mix damper servo motor [for driver

side]) with a new one

.

HINT:

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor

with a new one and check that the condition returns to normal.

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...

NEXT

NEXT

3.

CHECK FOR DTC

(a) Clear the DTC

.

(b) Check for DTC

.

OK:

DTC is not output.

NG

GO TO STEP 4

OK

END (AIR MIX SERVO MOTOR IS DEFECTIVE)

4.

REPLACE AIR CONDITIONING HARNESS

(a) Replace the air conditioning harness.

5.

CHECK FOR DTC

(a) Clear the DTC

.

(b) Check for DTC again

.

OK:

DTC is not output.

NG

REPLACE AIR CONDITIONING AMPLIFIER

OK

END (AIR CONDITIONING HARNESS IS

DEFECTIVE)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000002VXP00VX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1497/97;

BUS IC Communication Malfunction; 2015 MY Tundra [08/2014 - ]

DTC

B1497/97 BUS IC Communication Malfunction

DESCRIPTION

The air conditioning harness connects the air conditioning amplifier and each servo motor. The air conditioning

amplifier supplies power and sends operation instructions to each servo motor through the air conditioning

harness. Each servo motor sends the damper position information to the air conditioning amplifier.

DTC

CODE

DTC DETECTION

CONDITION

TROUBLE AREA

B1497/97

Communication line error or

open

Air conditioning harness

No. 1 damper servo sub-assembly (air mix damper servo

motor [for driver side])

No. 1 damper servo sub-assembly (air outlet servo motor)

Air mix servo motor (for passenger side)

Air inlet servo motor

Air cool bypass servo motor

Air conditioning amplifier

Harness or connector

WIRING DIAGRAM

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...

INSPECTION PROCEDURE

NOTICE:

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

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Select the Active Test, using the Techstream to generate a control command, and then check that

the servo motor operates.

Air Conditioner

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A...