Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Diagnosis System

DIAGNOSIS SYSTEM

OBD II

When troubleshooting OBD II (On-Board Diagnostics) vehicles, the GTS (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's TCM (Transmission Control Module) can be then read.

OBD II regulations require that the vehicle's on-board computer illuminates the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in:

  1. The emission control system and components.
  2. The powertrain control components (which affect vehicle emissions).
  3. The computer itself.

In addition, the applicable DTCs prescribed by SAE J2012 are stored in the TCM memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the TCM memory.

To check the DTCs, connect the GTS to the DLC3. The GTS displays output DTCs, Freeze Frame Data, and a variety of engine data. The DTCs and Freeze Frame Data can be cleared with the GTS. In order to enhance OBD function on vehicles and develop the Off-Board diagnosis system, Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a pair of data transmission lines spanning multiple computers and sensors. It allows for high speed communications between the systems and simplification of the wire harness connections.

NORMAL MODE AND CHECK MODE (GTS Only)

(a) The diagnosis system operates in normal mode during normal vehicle use. In normal mode, 2-trip detection logic is used to ensure accurate detection of malfunctions. Check mode is also available to technicians as an option. In check mode, 1-trip detection logic is used when reproducing malfunction symptoms for increasing the ability of the system to detect malfunctions, including intermittent malfunctions.

2-TRIP DETECTION LOGIC

(a) When a malfunction is first detected, the malfunction is temporarily stored in the TCM memory (1st trip). If the same malfunction is detected during the subsequent driving cycle, the MIL is illuminated (2nd trip).

FREEZE FRAME DATA

(a) The TCM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not and whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

(b) The GTS displays freeze frame data recorded at five different points: 1) 3 times before the DTC is stored, 2) once when the DTC is stored, and 3) once after the DTC is stored. The data can be used to reproduce the vehicle condition around the time of the malfunction. The data may be helpful in determining the cause of a malfunction. It may also be helpful in determining whether a DTC is being caused by a temporary malfunction.

LIST OF FREEZE FRAME DATA

Powertrain > Transmission

Tester Display

Total Distance Traveled

Total Distance Traveled - Unit

Vehicle Speed

Engine Speed

Calculate Load

Coolant Temperature

Intake Air Temperature

Ambient Temperature

Engine Run Time

Battery Voltage

Glow Indicator Supported

Throttle Position Sensor No.1 Voltage %

Stop Light SW

TC Terminal

MIL ON Run Distance

Running Time from MIL ON

Time after DTC Cleared

Distance from DTC Cleared

Warmup Cycle Cleared DTC

Accel Position from EFI

NSS Sensor Speed

NSS Sensor Voltage

NO Sensor Speed

NO Sensor Voltage

NT Sensor Speed

NC1 Sensor Speed

NC1 Sensor Voltage

Belt Clamping Force Sensor

Shift SW Status (P Range)

Shift SW Status (R Range)

Shift SW Status (N Range)

Shift SW Status (N,P Range)

Shift SW Status (N,P Range) Supported

Sport Shift Up SW

Sport Shift Down SW

Shift SW Status (S Range)

Shift SW Status (D Range)

A/T Oil Temperature No.1

ATF Thermal Degradation Estimate

CVT Oil Press Calibration

NT Sensor Voltage

Synchronize Stroke Sensor Position

Synchronize Stroke Sensor Voltage

Status of Synchronize

Lock Up Status

CVT Shift Status Ratio

Shift Mode

Solenoid (SLU)

Solenoid (SLS) High/Low

Solenoid (SLS) MAX/MIN

Solenoid (SLP)

Solenoid (SLG)

Solenoid (SL1)

Solenoid (SL2)

DATA LINK CONNECTOR 3 (DLC3)

(a) Check the DLC3.

Click here

AUXILIARY BATTERY VOLTAGE

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery.

MIL (Malfunction Indicator Lamp)

(a) The MIL is illuminated when the ignition switch is turned ON (with the engine not running).

If the MIL does not illuminate, check the MIL circuit.

Click here

(b) The MIL will turn off when the engine is started. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system.

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     Dtc Check / Clear

    DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing m

     Check Mode Procedure

    CHECK MODE PROCEDURE DESCRIPTION (a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that cannot be detected in normal mode. Check mode can also detect all of the m

     Fail-safe Chart

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     VEHICLE CONTROL HISTORY (RoB)

    VEHICLE CONTROL HISTORY (RoB) HINT: The Vehicle Control History stores the history of the reject function and system protection operations. The number of occurrences, date and distance are stored in batches for each item. CHECK VEHICLE CONTROL HISTORY (CONTINUOUSLY VARIABLE TRANSAX

     Installation

    INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION) Procedure Part Name Code 1 CAMSHAFT POSITION SENSOR (for Exhaust Side) 11102A - - 2 CAMSHAFT POSITION SENSOR (for Intake Side) 11102A - -

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