Engine Control System Tests W/codes - 1.8L: Other Toyota Corolla VIII рестайлинг

TWO-TRIP DETECTION LOGIC

When a malfunction initially occurs, Diagnostic Trouble Code (DTC) will be temporarily stored in ECM memory, but MIL on instrument panel will not illuminate. The second time malfunction is detected, MIL on instrument panel will illuminate, provided ignition is turned off and then back on after first malfunction was detected. This is referred to as the 2-Trip Detection Logic and only applies to specific DTCs.

Note. When road testing vehicle in CHECK mode (Toyota scan tool only), the Two Trip Detection Logic will not function. Also, MIL will illuminate first time a malfunction is detected.

DATA LINK CONNECTOR

OBD-II regulations (SAE J-1850) standardizes Data Link Connector (DLC) configurations. See DATA LINK CONNECTOR (DLC) NO. 3 LOCATION table. (Схема №2)

DATA LINK CONNECTOR (DLC) NO. 3 LOCATION

FREEZE-FRAME DATA

OBD-II or Toyota scan tool can by used to check freeze-frame data. The ECM records engine operating condition when a misfire, fuel trim (mixture) malfunction or other malfunction (fuel system, calculated load, coolant temperature, fuel trim (mixture), engine speed, vehicle speed, etc.) exists. If more than one fault is detected, only data from the first malfunction is recorded. Recorded data is useful for determining conditions in which the malfunction occurs.

NORMAL Mode Code Retrieval

1. Connect scan tool to Data Link Connector (DLC) No. 3. (Схема №2) Turn ignition on with engine off. Turn scan tool on. Using scan tool manufacturer's instructions, check for DTCs and freeze-frame data.
2. If scan tool displays UNABLE TO CONNECT TO VEHICLE, DLC No. 3 must be checked. See «DLC»(ref-22353-S29225709362001010300000) NO. 3 INSPECTION under SCAN TOOL PROBLEMS. If scan tool does not display UNABLE TO CONNECT TO VEHICLE, go to next step.
3. Record any DTCs and freeze-frame data displayed for system diagnosis. If driveability problem exists and no DTCs are present, go to «TESTS W/O CODES - 1.8L»(ref-22354) article for diagnosis by symptom.
4. If any DTCs are present, perform «CIRCUIT TEST»(ref-22353-S29481082692001010300000). See «DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION»(ref-22353-S38260203392001010300000) table. For more information on freeze-frame data, see «FREEZE-FRAME DATA»(ref-22353-S04905505152001010300000) under INTRODUCTION. For information on 2-trip detection logic codes, see «TWO-TRIP DETECTION LOGIC»(ref-22353-S42606357962001010300000) under INTRODUCTION.
5. After repairs for DTC have been completed, DTCs must be cleared from ECM memory. See «CLEARING DIAGNOSTIC TROUBLE CODES»(ref-22353-S39619853152001010300000).

SUMMARY

If no diagnostic trouble codes are present, driveability symptoms exist or intermittents exist, proceed to TESTS W/O CODES - 1.8L article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent procedures.

CIRCUIT TESTS

Note. Before performing any diagnostic circuit test, refer to SELF-DIAGNOSTIC SYSTEM for diagnostic system functions and system diagnostic procedures. For component location, see appropriate illustration in THEORY/OPERATION - 1.8L article.

Condition

DTC is set when ECM consistently detects more than 2 volts from VTA circuit and closed throttle position switch is on. Possible cause is

1. Throttle Position (TP) sensor.

DTC P0130 is set when sensor No. 1 voltage remains at .4 volt or more, or .6 volt or less during idle, once engine is at normal operating temperature. Possible causes are

1. Oxygen sensor.
2. Fuel trim.

DTC is set when ECM detects a response time of one second or more from sensor to change from rich to lean, or lean to rich. Possible cause is

1. Oxygen sensor.

DTC is set when sensor No. 2 voltage remains at .4 volt or more, or .6 volt or less during vehicle operation (25 MPH or more), once engine is at normal operating temperature. Possible cause is

1. Oxygen sensor.

DTC is set when either of the following conditions is present

1. Sensor heater current draw exceeds 2 amps.
2. Sensor heater current draw is .25 amp or less.

Possible causes are

1. Heated oxygen sensor open or short circuit.
2. Heated oxygen sensor heater.
3. ECM.