Charging System (Diagnostics - Introduction): Diagnosis Scion FR-S I

HOW TO PROCEED WITH TROUBLESHOOTING [07/2013 - ]

HINT

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases. The following 5 items are important points in the problem analysis: What Vehicle model, system name When Date, time, occurrence frequency Where Road conditions Under what conditions? Running conditions, driving conditions, weather conditions How did it happen? Problem symptoms NEXT: Go to next step
3. INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. NEXT: Go to next step
4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [07/2013 - 12/2013]»(ref-612381-S33318737382014042900000). RESULT Result Proceed to CAN DTCs are not output A CAN DTCs are output B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [07/2013 - 12/2013]»(ref-612381-S39654712422014042900000). A: Go to next step
5. CHECK FOR DTC* HINT: Refer to DTC Check / Clear. Refer to «DTC CHECK / CLEAR [07/2013 - ]»(ref-612376-S42040746272014042900000). RESULT Result Proceed to No code A Trouble code B B --> GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART [07/2013 - ]»(ref-612376-S01524865652014042900000) A: Go to next step
6. REFER TO PROBLEM SYMPTOMS TABLE HINT: Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [07/2013 - ]»(ref-612376-S19087890402014042900000). RESULT Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 10 A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* HINT: Refer to Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST [07/2013 - ]»(ref-612376-S12034240422014042900000). RESULT Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 10 A: Go to next step
8. CHECK ECU CIRCUIT HINT: Refer to Terminals of ECU. Refer to «TERMINALS OF ECU [07/2013 - ]»(ref-612376-S21177437232014042900000). NG --> GO TO STEP 10 OK: Go to next step
9. CHECK FOR INTERMITTENT PROBLEMS HINT: Refer to Symptom Simulation. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [07/2013 - 12/2013]»(ref-612229-S16181698712014042900000). NEXT: Go to next step
10. CONDUCT PARTS INSPECTION NEXT: Go to next step
11. IDENTIFY PROBLEM NEXT: Go to next step
12. ADJUST AND/OR REPAIR NEXT: Go to next step
13. CONDUCT CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE [07/2013 - ]

HINT

1. 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 suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

CHARGING SYSTEM

Scheme 13

Scheme 14

1. CHECK ECM Measure the resistance, voltage and waveform according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A33-2 (BATT) - A34-1 (E03) W - B-R Battery power Always 11 to 14 V A33-11 (IB) - A35-30 (EPA2) R-B - Y-B Battery current sensor Ignition switch ON 0.5 to 4.5 V A33-24 (THB) - A35-30 (EPA2) R-W - Y-B Battery temperature sensor Ignition switch ON 20 to 50°C (68 to 122°F) 1.1 to 2.4 V A34-1 (E03) - Body ground B-R - Body ground Body ground Always Below 1 ohms A35-18 (ALT) - A34-1 (E03) V - B-R Generator Idling with warm engine Pulse generation (See waveform 1) A35-22 (VCP2) - A35-30 (EPA2) G-B - Y-B Power source of battery current sensor assembly Ignition switch ON 4.5 to 5.5 V If the result is not as specified, the ECU may have a malfunction. WAVEFORM 1 GENERATOR Tester Connection Tool Setting Vehicle Condition Specified Condition A35-18 (ALT) - A34-1 (E03) 2 V/DIV., 2 msec./DIV. Idling with warm engine Correct waveform as shown in illustration HINT: The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown. A constant value is not output, as the duty ratio varies depending on the electrical load and battery condition.

DIAGNOSIS SYSTEM [07/2013 - ]

1. DLC3 (Data Link Connector 3) Check the DLC3. Refer to «GENERAL INFORMATION [07/2013 - ]»(ref-612229-S35930398492014042900000).
2. BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, replace or recharge the battery.

DTC CHECK / CLEAR [07/2013 - ]

1. CHECK DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / DTC. Check the DTC(s), and then write them down. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART [07/2013 - ]»(ref-612376-S01524865652014042900000).
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / DTC. Clear the DTCs.

DATA LIST / ACTIVE TEST [07/2013 - ]

1. 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. NOTE: 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. Warm up the engine. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List. Check the values by referring to the table below. ECM Tester Display Measurement Item/Range Normal Condition Diagnostic Note Battery Voltage Battery voltage: Min.: 0 V, Max.: 65.535 V 11 to 14 V: Idling When the battery voltage is below 11 V, other systems may be affected. Reference figures: IG ON: 12.5 V When cranking: 9.834 V When idling (after warming up): 13.359 V Battery Current Battery current: Min.: -125 A, Max.: 125 A Changes in response to the amount of electricity generated by the alternator: while running after warming up. When a malfunction occurs, there may be a problem with the IB voltage system or the sensor power source. Battery Temperature Battery temperature: Min.: -40°C (-40°F), Max.: 6513.5°C (11756.3°F) Changes in response to the actual temperature: while running after warming up. When a malfunction occurs, there may be a problem with the THB voltage system or the sensor power source. Alt Vol - Non Active Test Displays the voltage required when the regulator is not being forcefully driven: Min.: 0 V, Max.: 80 V Changes in response to the battery fluid temperature and running state (12.4 to 14.8 V): after starting the engine. When a malfunction occurs, there may be problems with charging control systems. Alt Vol - Active Test Displays the voltage required when the regulator is being forcefully driven: Min.: 0 V, Max.: 80 V Specified voltage required when performing the "generation required voltage" active test: after starting the engine. Displays the voltage generated when performing the active test. When a malfunction occurs, there may be problems with the charging control systems. Alternator Duty Displays the charging control signal: Min.: 0%, Max.: 255 % Changes in response to the amount of electricity generated by the alternator: while charging control. When a malfunction occurs, there may be problems with the charging control systems. Request Voltage to Alternator Displays the alternator generation control mode: Min.: 13.5 V, Max.: 14.5 V Changes in response to the amount of electricity generated by the alternator: while charging control. When a malfunction occurs, there may be problems with the charging control systems. # Codes (Include History) Number of DTCs: Min.: 0, Max.: 255 0
2. 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. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test. Perform the Active Test by referring to the table below. ECM Tester Display Test Part Control Range Diagnostic Note Control the Voltage of Alternator Fluctuations in the required alternator generated voltage. Between 12.8 and 14.0 V While engine running. While engine running. Test is possible when vehicle is stopped and engine is idling Shift lever P or N position

DIAGNOSTIC TROUBLE CODE CHART [07/2013 - ]

See also:
• INSPECTION [07/2013 - ]