Smart Key System (For Start Function) (Diagnostics - Introduction): Diagnosis Toyota 4Runner V

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use these procedures to troubleshoot the push-button start function.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS CHECK 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. 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. RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-422172-S35406285762011092600000) A: Go to next step
5. CHECK FOR DTC* Check for DTCs and note any codes that are output. Refer to «DTC CHECK / CLEAR»(ref-422135-S34231058172011092600000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-422135-S34231058172011092600000) . Recheck for DTCs. RESULT Result Proceed to DTC is not output again A DTC is output again B B --> GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422135-S10125442312011092600000) A: Go to next step
6. INSPECT BASIC OPERATION Check that the engine can be started by the basic operation. Push the engine switch when the brake pedal is depressed and the shift lever is in P. Check that the engine starts. OK Engine starts. Check that the engine switch mode can be changed by pushing the engine switch. Without depressing the brake pedal, push the engine switch repeatedly. Check that the power source mode turns from off to on (ACC) to on (IG) and back to off. OK Power source mode changes as described above. With the brake pedal depressed and the shift lever in P, push the engine switch. Check that the engine starts normally from any power source mode status. OK Engine starts normally from any power source mode status. NEXT: Go to next step
7. PROBLEM SYMPTOMS TABLE Refer to «PROBLEM SYMPTOMS TABLE»(ref-422135-S22731375122011092600000) . RESULT Result Proceed to Fault is not listed in the problem symptoms table A Fault is listed in the problem symptoms table B B --> Go to step 9 A: Go to next step
8. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-422135-S39176339702011092600000) . Data List/Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-422135-S13066215272011092600000) . NEXT: Go to next step
9. REPAIR OR REPLACE NEXT: Go to next step
10. CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE

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 the system before inspecting the suspected areas below.

SMART KEY SYSTEM (FOR START FUNCTION)

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

1. CHECK POWER MANAGEMENT CONTROL ECU Disconnect the F80 power management control ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F80-1 (AM22) - Body ground B - Body ground +B power supply Always 9.5 to 14 V F80-2 (AM21) - Body ground B - Body ground +B power supply Always 9.5 to 14 V F80-5 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms F80-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms F80-17 (SSW2) - Body ground R - Body ground Engine switch signal Engine switch pushed Below 1 ohms F80-17 (SSW2) - Body ground R - Body ground Engine switch signal Engine switch not pushed 10 kohms or higher F80-18 (SSW1) - Body ground LG - Body ground Engine switch signal Engine switch pushed Below 1 ohms F80-18 (SSW1) - Body ground LG - Body ground Engine switch signal Engine switch not pushed 10 kohms or higher F80-24 (LIN2) - Body ground G - Body ground LIN line Always 10 kohms or higher If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the F80 power management control ECU connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F80-3 (SLP) - F80-6 (GND) SB - W-B Steering lock actuator position signal Steering lock released Pulse generation (Scheme 49) F80-3 (SLP) - F80-6 (GND) SB - W-B Steering lock actuator position signal Steering lock locked Pulse generation (Scheme 50) F80-8 (SLR+) - F80-6 (GND) GR - W-B Steering lock motor signal Steering lock motor operating Below 1 V F80-8 (SLR+) - F80-6 (GND) GR - W-B Steering lock motor signal Steering lock motor not operating 11 to 14 V F80-10 (INDW) - F80-6 (GND) L - W-B Warning signal Brake pedal depressed Shift lever in P Engine switch on (ACC) or on (IG) 8 to 14 V F80-16 (P) - F80-6 (GND) V - W-B Shift lock signal Shift lever in P 8 to 14 V F80-16 (P) - F80-6 (GND) V - W-B Shift lock signal Shift lever not in P Below 1 V F80-19 (ACCD) - F80-6 (GND) R - W-B ACC signal Engine switch on (ACC) 8 to 14 V F80-19 (ACCD) - F80-6 (GND) R - W-B ACC signal Engine switch off Below 1 V F80-20 (IG1D) - F80-6 (GND) V - W-B IG1 signal Engine switch on (IG) 8 to 14 V F80-20 (IG1D) - F80-6 (GND) V - W-B IG1 signal Engine switch on (ACC) Below 1 V F80-22 (INDS) - F80-6 (GND) B - W-B Vehicle condition signal Brake pedal depressed Shift lever in P 8 to 14 V F80-23 (SPD) - F80-6 (GND) SB - W-B Vehicle speed signal Engine switch on (IG), vehicle being driven at approx. 20 km/h (12 mph) Pulse generation (Scheme 50) F81-2 (STA) - F80-6 (GND) W - W-B Park/neutral position switch signal Shift lever in P or N Below 1 V F81-3 (STAR) - F80-6 (GND) B - W-B Starter signal Brake pedal depressed Shift lever in P Engine cranking 8 to 14 V* F81-8 (IG2D) - F80-6 (GND) L - W-B IG2 signal Engine switch on (IG) 8 to 14 V F81-8 (IG2D) - F80-6 (GND) L - W-B IG2 signal Engine switch on (ACC) Below 1 V F81-11 (STP1) - F80-6 (GND) V - W-B Stop light signal Brake pedal depressed 8 to 14 V F81-11 (STP1) - F80-6 (GND) V - W-B Stop light signal Brake pedal released Below 1 V *: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the connector from the ECM before measuring the voltage. If the result is not as specified, the ECU may have a malfunction. Using an oscilloscope, check the signal waveform of the ECU. Waveform 1 WAVEFORM 1 (REFERENCE) Terminal No. (Symbol) F80-3 (SLP) - F80-6 (GND) Tool Setting 2 V/DIV., 100 ms./DIV. Vehicle Condition Steering lock locked or released Waveform 2 WAVEFORM 2 (REFERENCE) Terminal No. (Symbol) F80-23 (SPD) - F80-6 (GND) Tool Setting 5 V/DIV., 10 ms./DIV. Vehicle Condition Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) HINT: As the vehicle speed increases, the wavelength shortens.
2. CHECK CERTIFICATION ECU Disconnect the F79 certification ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F79-1 (+B) - Body ground V - Body ground +B power supply Always 11 to 14 V F79-15 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms F79-29 (LIN) - Body ground G - Body ground LIN line Always 10 kohms or higher If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK STEERING LOCK ECU Disconnect the F68 steering lock ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F68-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms F68-6 (IG2) - Body ground W - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V F68-6 (IG2) - Body ground W - Body ground Ignition power supply Engine switch off Below 1 V F68-7 (B) - Body ground GR - Body ground +B power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the F68 steering lock ECU connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F68-4 (SLP1) - F68-1 (GND) SB - W-B Steering lock actuator position signal Steering lock locked 11 to 14 V F68-4 (SLP1) - F68-1 (GND) SB - W-B Steering lock actuator position signal Steering lock released Below 1 V If the result is not as specified, the ECU may have a malfunction.

DIAGNOSIS SYSTEM

1. DESCRIPTION Smart key system (for start function) data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the function seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
2. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(ref-421949-S00613228562011092600000) .
3. INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Trouble Codes. Check for DTCs. HINT: Refer to the Techstream operator's manual for further details.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Trouble Codes. Clear the DTCs by following the directions on the Techstream display. HINT: Refer to the Techstream operator's manual for further details.

DATA LIST / ACTIVE TEST

1. READ 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. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Data List. According to the display on the Techstream, read the Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift P Signal Shift P position signal / ON or OFF ON: Shift lever in P OFF: Shift lever not in P - Steering Unlock Switch Steering lock condition / ON or OFF ON: Steering lock released (Engine switch on [ACC]) OFF: Steering lock locked (Engine switch off) - Stop Light Switch1 Stop light switch 1 / ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - Start Switch1 Start switch 1 / ON or OFF ON: Engine switch pushed OFF: Engine switch not pushed - Start Switch2 Start switch 2 / ON or OFF ON: Engine switch pushed OFF: Engine switch not pushed - Neutral SW/ Clutch SW Status of park/neutral position switch / ON or OFF ON: Park/neutral position switch on OFF: Park/neutral position switch off - Latch Circuit Latch circuit / ON or OFF ON: Engine switch on (IG) or engine running OFF: Engine switch off or on (ACC) - IG1 Relay Monitor(Outside) IG1 outer relay monitor / ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG1 Relay Monitor(Inside) IG1 inner relay monitor / ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor(Outside) IG2 outer relay monitor / ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor(Inside) IG2 inner relay monitor / ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Starter Request Signal Starter request signal monitor / ON or OFF ON: ST relay on OFF: ST relay off The engine switch is pressed and held with the shift lever in P or N. ACC Relay Monitor ACC relay monitor / ON or OFF ON: Engine switch on (ACC) OFF: Engine switch off - Engine Condition Engine condition / Stop or Run Stop: Engine stopped Run: Engine running - Vehicle Speed Signal Vehicle speed signal / Stop or Run Stop: Vehicle stopped Run: Vehicle driven (5 km/h (3 mph) or more) - Shift P Signal Pulse Status of shift P signal pulse / Unknown, Error2, Normal2, Error1, Normal3, Error3 or Normal1 Unknown: Shift P signal pulse unknown Error1, Error2 or Error3: Shift P signal pulse abnormal Normal1, Normal2 or Normal3: Shift P signal pulse normal - Power Supply Condition Power supply condition / IG2 ON, ST ON, All OFF, IG1 ON or ACC ON IG2 ON: IG2 relay on ST ON: ST request signal on All OFF: All relays off IG1 ON: IG1 relay on ACC ON: ACC relay on - Powertrain Type Status of powertrain type / HV-AT, Cnv-MT, Cnv-AT, Cnv-MMT Cnv-AT: Powertrain type automatic transmission - IG1 Circuit Status of IG1 circuit / OK or NG OK: IG1 circuit OK NG: IG1 circuit NG - IG2 Circuit Status of IG2 circuit / OK or NG OK: IG2 circuit OK NG: IG2 circuit NG - Starter SW Sig Mismatch Starter switch signal mismatch / Yes or No Yes: Starter switch signal mismatch No: Starter switch signal match - Park Signal Mismatch Park signal mismatch / Yes or No Yes: Park signal mismatch No: Park signal match - Str Lock/Unlock Wait T-Out Steering lock/unlock waiting timed out / Yes or No Yes: Steering lock/unlock waiting timed out No: Steering lock locks/releases normally within specified time - Key Certifi Wait T-Out Key certification waiting timed out / Yes or No Yes: Key certification waiting timed out No: Key certification completed within specified time - Number of Diagnosis Code Number of diagnostic trouble codes / 0 to 255 - - SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note #Codes Number of diagnostic trouble codes / 0 to 255 - - Power Supply Short Power supply short / OK or NG(Past) OK: Power supply normal NG(Past): Power supply short occurred in past - Power Supply Open Power supply open / OK or NG(Past) OK: Power supply normal NG(Past): Power supply open occurred in past - Engine Start Request Start request signal response / OK or NG OK: Received NG: Not received - S Code Check S code certification result / OK or NG OK: S code certification result normal NG: S code certification result abnormal - L Code Check L code certification result / OK or NG OK: L code certification result normal NG: L code certification result abnormal - S Code Check(Past) S code certification result / OK or NG (Past) OK: S code certification result normal NG (Past): S code certification result abnormal occurred in past - L Code Check(Past) L code certification result / OK or NG (Past) OK: L code certification result normal NG (Past): L code certification result abnormal occurred in past
2. PERFORM 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 engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Active Test. According to the display on the Techstream, perform the Active Test. POWER SOURCE CONTROL Tester Display Test Part Control Range Diagnostic Note Indicator Condition Engine switch indicator Green / Red / No Sig Perform this Active Test when the engine switch is off, or while the engine is running. P Supply for Steering Lock Power supply for steering lock motor ON / OFF This test supplies or stops power to the steering lock motor.

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See" below.

SMART KEY SYSTEM (FOR START FUNCTION)