Lexus ES: Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the values listed under Normal Condition are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the A/C switch off.
(c) Turn the engine switch off.
(d) Connect the Techstream to the DLC3.
(e) Turn the engine switch on (IG).
(f) Turn the Techstream on.
(g) Enter the following menus: Powertrain / Engine / Data List.
(h) According to the display on the Techstream, read the Data List.
HINT:
Normal Condition: If no idling conditions are specified, the shift lever should be in N or P, and the A/C switch and all accessory switches should be off.
Powertrain > Engine > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Battery Voltage | Battery voltage | Min.: 0.0 V Max.: 65.5 V | 11 to 14 V: Idling | If the result is not as specified, abnormal battery voltage is suspected. |
| Alternator Output Duty Ratio | Generator output duty | Min.: 0.0% Max.: 399.9% | Changes according to alternator output. | If the result is not as specified, a malfunction of the charging system is suspected. |
| Alternator Voltage - Non Active Test | Requested voltage when regulator forced drive is not executed | Min.: 0.000 V Max.: 79.998 V | After engine start: 13.5 to 14.4 V (varies with generator temperature) | If the result is not as specified, a malfunction of the charging system is suspected. |
| Voltage of Alternator | Requested voltage when regulator under forced activation | Min.: 0.0 V Max.: 79.99 V | After engine start: Approximately same as requested output voltage when Active Test "Control the Voltage of Alternator" is performed. | If the result is not as specified, a malfunction of the charging system is suspected. |
ACTIVE TEST
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Powertrain > Engine > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Control the Voltage of Alternator | Requested output voltage of generator regulator during forced activation | Between 12.5 and 14.7 V | Test is possible after engine start |
READ NEXT:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Charging System DTC No. Detection Item Warning Indicate Memory Note Link P161A87 Lost Communication with Alternator Missing Message Charge warning is
Fail-safe Chart
FAIL-SAFE CHART If the following DTC is stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily. DTC No. Fail-safe Operation Fail-safe Deactivation Condition P16
Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION The ECM 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 deter
SEE MORE:
Brake Switch "A" Circuit Short to Ground (P057111)
DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied. When the brake pedal is depressed and no signal is received from the stop light switch assembly, this DTC is output. DTC No. D
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect
