As a method for locating the suspect circuit, when the self-diagnostics start signal is input, the memory for the
malfunction location is output and the A/T CHECK indicator lamp flashes to display the corresponding DTC.

Operation Procedure

CHECK A/T CHECK INDICATOR LAMP

Start the engine with selector lever in “P” position. Warm engine to normal operating temperature.

Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.

Wait 10 seconds.

Turn ignition switch ON. (Do not start engine.)

Does A/T CHECK indicator lamp come on for about 2 seconds?

YES

>> GO TO 2.

>> GO TO

AT-190, "A/T CHECK Indicator Lamp Does Not Come On"

JUDGEMENT PROCEDURE

Turn ignition switch OFF.

Keep pressing shift lock release button.

Move selector lever from “P” to “D” position.

Release accelerator pedal. (Set the closed throttle position signal ON.)

Depress brake pedal. (Stop lamp switch signal ON.)

Turn ignition switch ON.

Wait 3 seconds.

Move the selector lever to the manual shift gate side. (Manual mode signal ON.)

Release brake pedal. (Stop lamp switch signal OFF.)

10. Move the selector lever to “D” position. (Manual mode signal OFF.)

11. Depress brake pedal. (Stop lamp switch signal ON.)

12. Release brake pedal. (Stop lamp switch signal OFF.)
13. Depress accelerator pedal fully and release it.

>> GO TO 3.

CHECK SELF-DIAGNOSIS CODE

Check A/T CHECK indicator lamp.
Refer to

AT-104, "Judgement Self-diagnosis Code"

If the system does not go into self-diagnostics. Refer to

AT-113, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

AT-184, "CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIRCUIT"

AT-167, "DTC P1815 MANUAL MODE SWITCH"

AT-185, "BRAKE SIGNAL CIRCUIT"

>> DIAGNOSIS END

AT-104

TROUBLE DIAGNOSIS

Judgement Self-diagnosis Code

If there is a malfunction, the lamp lights up for the time corresponding to the suspect circuit.

Erase Self-diagnosis

●

In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.

●

However, this information is erased by turning ignition switch OFF after performing self-diagnostics or by
erasing the memory using the CONSULT-II.

No.

Malfunctioning item

No.

Malfunctioning item

Revolution sensor

AT-119

A/T fluid temperature sensor

AT-135

Direct clutch solenoid valve

AT-155

AT-157

Turbine revolution sensor

AT-117

Torque converter clutch solenoid valve

A/T interlock

Line pressure solenoid valve

AT-130

A/T 1st engine braking

AT-145

Input clutch solenoid valve

AT-147

AT-149

Start signal

AT-108

Front brake solenoid valve

AT-151

AT-153

Accelerator pedal position sensor

AT-132

Low coast brake solenoid valve

AT-163

AT-165

Engine speed signal

AT-124

High and low reverse clutch solenoid valve

AT-159

AT-161

CAN communication line

AT-105

PNP switch

AT-113

SCIA5767E

DTC U1000 CAN COMMUNICATION LINE

AT-105

DTC U1000 CAN COMMUNICATION LINE

PFP:23710

Description

NCS001KJ

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

NCS001KK

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-II or 17th judgement flicker with-
out CONSULT-II is detected when TCM cannot communicate to other control units.

Possible Cause

NCS001KL

Harness or connectors
(CAN communication line is open or shorted.)

DTC Confirmation Procedure

NCS001KM

NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II

Turn ignition switch ON.

Select “ECU INPUT SIGNAL” or “MAIN SIGNAL” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.

Start engine and wait for at least 6 seconds.

If DTC is detected, go to

AT-107, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

BCIA0030E

AT-106

DTC U1000 CAN COMMUNICATION LINE

Wiring Diagram — AT — CAN

NCS001KN

TCWT0342E

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