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Smart Access System (Keyless Start) (Diagnostic Codes & Symptom Tests): Diagnosis Lexus HS I

Starter 14 illustrations ~5773 words

INSPECTION PROCEDURE

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 33

Scheme 33: PROCEDURE
Scheme 33: PROCEDURE

Scheme 34

Scheme 34
Scheme 34

Scheme 35

Scheme 35
Scheme 35
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) Disconnect the F52 connector from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F52-1 (AM22) - Body ground Always 11 to 14 V F52-2 (AM21) - Body ground Always 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-6 (GND) - Body ground Always Below 1 ohms F52-5 (GND2) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY) Remove the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-2 - 1A-3 20°C (68°F) 130 to 230 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Engine Room Relay Block) NG --> REPLACE NO. 1 INTEGRATION RELAY OK: Go to next step
  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAYS) Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-25 - 2B-4 20°C (68°F) 52.32 to 79.32 ohms 2B-25 - 2B-6 20°C (68°F) 52.32 to 79.32 ohms 2B-4 - 2B-6 Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 10 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-20 (IG1D) - 2B-25 Always Below 1 ohms F52-20 (IG1D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-4 - Body ground Always Below 1 ohms 2B-6 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY) Disconnect the F51 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F51-8 (IG2D) - 1A-2 Always Below 1 ohms F51-8 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY) OK: Go to next step
  8. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-3 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM RELAY BLOCK - BODY GROUND) OK: Go to next step
  9. CHECK POWER MANAGEMENT CONTROL ECU Install the instrument panel junction block assembly. Install the engine room relay block. Reconnect the F51 and F52 connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F51-8 (IG2D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more F52-20 (IG1D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> See step 11 OK --> See step 12
  10. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL - Step 3»(ref-398241-S20200475162011051600000)
  11. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  12. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 36

Scheme 36: PROCEDURE
Scheme 36: PROCEDURE

Scheme 37

Scheme 37
Scheme 37
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL - Step 3»(ref-398241-S20200475162011051600000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2A-43 - 2B-4 20°C (68°F) 81.49 to 118.98 ohms 2A-43 - 2B-6 20°C (68°F) 81.49 to 118.98 ohms 2B-4 - 2B-6 Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 7 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-19 (ACCD) - 2A-43 Always Below 1 ohms F52-19 (ACCD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-4 - Body ground Always Below 1 ohms 2B-6 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) OK: Go to next step
  6. INSPECT POWER MANAGEMENT CONTROL ECU Reinstall the instrument panel junction block assembly. Reconnect the F52 connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F52-19 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2 V or more TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> See step 8 OK --> See step 9
  7. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL - Step 3»(ref-398241-S20200475162011051600000)
  8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  9. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes the on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 38

Scheme 38: PROCEDURE
Scheme 38: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. CHECK FOR HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) Disconnect the C28 connector from the hybrid vehicle control ECU. Disconnect the F51 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C28-2 (ST2) - F51-7 (ST2) Always Below 1 ohms C28-2 (ST2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) OK: Go to next step
  4. CHECK POWER MANAGEMENT CONTROL ECU Reconnect the F51 connector to the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F51-7 (ST2) - Body ground With brake pedal depressed, power switch is pressed and held for 3 seconds and then released. Output voltage at terminal AM21 or AM22 is -2 V or more TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> See step 5 OK --> See step 6
  5. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  6. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398094-S33423791982011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored.

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 39

Scheme 39: PROCEDURE
Scheme 39: PROCEDURE
  1. CHECK CAN COMMUNICATION SYSTEM Check if CAN communication DTCs are output. HINT: If any DTCs for CAN communication system malfunction are output, inspect those DTCs first. OK CAN communication DTC is not output. NG --> See step 10 OK: Go to next step
  2. CHECK SPEEDOMETER OPERATION Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Combination Meter / Data List. Check the Data List for proper functioning of the vehicle speed signal. COMBINATION METER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0, Max.: 255 Almost same as actual speed (When driving) - OK Vehicle speed displayed on the Techstream is almost the same as the actual vehicle speed measured using a speedometer tester. NG --> See step 11 OK: Go to next step
  3. READ VALUE USING TECHSTREAM Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle speed signal Vehicle speed signal/Stop or Run Stop: Vehicle stopped Run: Vehicle running - OK Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen. NG --> See step 4 OK --> See step 12
  4. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Disconnect the F4 connector from the combination meter assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-23 (SPD) - F4-40 (+S) Always Below 1 ohms F52-23 (SPD) - Body ground Always 10 kohms or higher NG --> See step 8 OK: Go to next step
  7. INSPECT COMBINATION METER ASSEMBLY Remove the combination meter assembly. Refer to «REMOVAL»(ref-398236-S19518532552011051600000) . Reconnect the F4 connector to the combination meter assembly. Reconnect the F52 connector to the power management control ECU. Connect an oscilloscope to terminal F4-40 (+S) and body ground. Turn the power switch on (IG). Turn a wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being rotated OK The waveform is similar to that shown in the illustration. TEXT IN ILLUSTRATION *1 Component with harness connected (Combination Meter Assembly) HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. NG --> See step 13 OK --> See step 14
  8. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) Disconnect the F96 connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F4-40 (+S) - F96-53 Always Below 1 ohms F4-40 (+S) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - JUNCTION CONNECTOR) OK: Go to next step
  9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION CONNECTOR) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-23 (SPD) - F96-64 Always Below 1 ohms F52-23 (SPD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION CONNECTOR) OK --> REPLACE JUNCTION CONNECTOR
  10. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
  11. GO TO METER / GAUGE SYSTEM (Speedometer Malfunction). Refer to «Speedometer Malfunction»(ref-398261-S41316506142011051600000)
  12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  13. GO TO METER / GAUGE SYSTEM (Speed Signal Circuit). Refer to «Speed Signal Circuit»(ref-398261-S34359180092011051600000)
  14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.

Scheme 40

Scheme 40: PROCEDURE
Scheme 40: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. INSPECT STOP LIGHT SWITCH ASSEMBLY Remove the stop light switch assembly. Refer to «REMOVAL»(ref-398250-S36734027602011051600000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Pushed 10 kohms or higher 3 - 4 Pushed Below 1 ohms 1 - 2 Not pushed Below 1 ohms 3 - 4 Not pushed 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Stop Light Switch Assembly) *2 Free *3 Pushed in NG --> See step 6 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Disconnect the F51 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F51-11 (STP1) - A25-1 Always Below 1 ohms F51-11 (STP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  5. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 Stop light switch1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 7 OK --> See step 8
  6. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-398250-S36734027602011051600000)
  7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  8. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DTC C1249/49). Refer to «DTC C1249/49: Open in Stop Light Switch Circuit»(ref-398289-S11754140982011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Check the connector connection to the terminal to make sure that there is no abnormality such as a loose connection, deformation, etc.

Scheme 41

Scheme 41: PROCEDURE
Scheme 41: PROCEDURE

Scheme 42

Scheme 42
Scheme 42
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) Disconnect the F51 connector from the power management control ECU. Disconnect the C28 connector from the hybrid vehicle control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F51-12 (RDY) - C28-9 (RDY) Always Below 1 ohms F51-12 (RDY) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) OK: Go to next step
  4. READ VALUE USING TECHSTREAM Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ready Signal Status of the ready signal/ON or OFF ON: Hybrid control system on (on (READY)) OFF: Hybrid control system off - OK ON and OFF appear on the screen. NG --> See step 5 OK --> See step 6
  5. CHECK POWER MANAGEMENT CONTROL ECU Reconnect the F51 connector to the power management control ECU. Reconnect the C28 connector to the hybrid vehicle control ECU. Check the signal waveform according to the condition(s) in the table below. Tester Connection F51-12 (RDY) - Body ground Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Power switch on (IG) --> on (READY) TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> See step 7 OK --> See step 8
  6. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398094-S33423791982011051600000)
  7. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398094-S33423791982011051600000)
  8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 43

Scheme 43: PROCEDURE
Scheme 43: PROCEDURE

Scheme 44

Scheme 44
Scheme 44
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) OK: Go to next step
  3. READ VALUE USING TECHSTREAM Reconnect the F52 connector to the power management control ECU. Turn the power switch off. Connect the Techstream to the DLC3. Turn the Techstream on. Turn on and off any of the door courtesy light switches repeatedly at 1.5-second intervals or less until communication between the Techstream and vehicle starts. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Key Certification Waiting Timed Out Key certification error detection/ No or Yes No: Key certification error not detected Yes: Key certification error detected - OK When more than 1 second elapses after the power switch is turned from off to on (IG), No is displayed in the Data List. NG --> See step 9 OK: Go to next step
  4. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Start switch 1/ON or OFF ON: Power switch pushed OFF: Power switch not pushed - Start Switch2 Start switch 2/ON or OFF ON: Power switch pushed OFF: Power switch not pushed - OK ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen. NG --> See step 7 OK: Go to next step
  5. CHECK POWER MANAGEMENT CONTROL ECU Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply condition/All OFF, ACC ON, IG1 ON, IG2 ON, ST ON ALL OFF: All relays off ACC ON: ACC relay on IG1 ON: IG1 relay on IG2 ON: IG2 relay on ST ON: ST request signal on - Measure the voltage while checking the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition F52-20 (IG1D) - Body ground Power switch off Below 1 V F52-20 (IG1D) - Body ground Power switch on (ACC) Below 1 V F52-20 (IG1D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more F51-8 (IG2D) - Body ground Power switch off Below 1 V F51-8 (IG2D) - Body ground Power switch on (ACC) Below 1 V F51-8 (IG2D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more F52-19 (ACCD) - Body ground Power switch off Below 1 V F52-19 (ACCD) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more F52-19 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2 V or more TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> See step 10 OK: Go to next step
  6. CONFIRMATION TEST Check that the power source mode becomes on (ACC) and on (IG) when the power switch is operated. OK Power source mode becomes on (ACC) and on (IG) when the power switch is operated. NG --> CHECK RELAY CONTACT SIDE CIRCUIT OK --> See step 11
  7. CHECK POWER SWITCH Remove the power switch. Refer to «REMOVAL»(ref-398263-S28435208792011051600000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F2-7 (SS1) - F2-5 (GND) Pushed Below 1 ohms F2-7 (SS1) - F2-5 (GND) Not pushed 10 kohms or higher F2-2 (SS2) - F2-5 (GND) Pushed Below 1 ohms F2-2 (SS2) - F2-5 (GND) Not pushed 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Power Switch) NG --> See step 12 OK: Go to next step
  8. CHECK HARNESS AND CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND) Disconnect the F52 connector from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-17 (SSW2) - F2-2 (SS2) Always Below 1 ohms F52-18 (SSW1) - F2-7 (SS1) Always Below 1 ohms F52-17 (SSW2) - Body ground Always 10 kohms or higher F52-18 (SSW1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU OR BODY GROUND) OK --> See step 13
  9. CHECK FOR DTC Enter the following menus: Body Electrical / Power Source Control and Smart Access / DTC. Check for DTCs. Result Result Proceed to The following DTCs are not output: B2785 B2287 B2784 A DTC B2785 is not output but DTC B2287 is output. B DTCs other than B2287 are output. C B --> See step 14 A --> See step 15 C --> GO TO DIAGNOSTIC TROUBLE CODE CHART
  10. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  11. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  12. REPLACE POWER SWITCH. Refer to «REMOVAL»(ref-398263-S28435208792011051600000)
  13. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  14. GO TO OTHER FLOW CHART. Refer to «DTC B2287: LIN Communication Master Malfunction»(ref-398322-S21747578952011051600000)
  15. GO TO OTHER FLOW CHART (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(ref-398332-S25867625292011051600000)

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Note. When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, power source mode that was selected when the auxiliary battery was removed is restored. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 45

Scheme 45: PROCEDURE
Scheme 45: PROCEDURE

Scheme 46

Scheme 46
Scheme 46
  1. CHECK HYBRID SYSTEM (READY ON) Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> See step 2 OK --> END (HYBRID SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED)
  2. CHECK LIN COMMUNICATION SYSTEM Check if LIN communication DTCs are output. OK LIN communication DTC is not output. NG --> See step 22 OK: Go to next step
  3. CHECK FOR DTC Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Hybrid Control / DTC. Check for DTCs. OK DTC is not output. NG --> See step 23 OK: Go to next step
  4. CHECK FOR DTC Enter the following menus: Body Electrical / Power Source Control / DTC. Check for DTCs. OK DTC is not output. NG --> See step 24 OK: Go to next step
  5. CHECK POWER SOURCE CONDITION Check the power source mode change. When the key is inside the vehicle and park (P) has been selected, check that pressing the power switch causes the power source mode to change. Result Result Proceed to off --> on (ACC) --> on (IG) --> off A Power source mode does not change to on (IG and ACC) B Power source mode does not change to on (IG) C Power source mode does not change to on (ACC) D D --> See step 27 C --> See step 26 B --> See step 25 A: Go to next step
  6. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light Switch1 Stop light switch 1/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 13 OK: Go to next step
  7. READ VALUE USING TECHSTREAM (L CODE) Enter the following menus: Body Electrical / Smart Access / Data List. Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/OK or NG OK: L code certification result normal NG: L code certification result abnormal - OK OK appears on the screen. NG --> See step 15 OK: Go to next step
  8. READ VALUE USING TECHSTREAM (ENGINE START REQUEST) Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Start Request Start request signal response/OK or NG OK: Start request condition signal received NG: Start request condition signal not received - OK OK appears on the screen. NG --> REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) OK: Go to next step
  9. READ VALUE USING TECHSTREAM (S CODE) Read the Data List according to the display on the Techstream. SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/OK or NG OK: S code certification result normal NG: S code certification result abnormal - OK OK appears on the screen. NG --> See step 17 OK: Go to next step
  10. CHECK ID CODE BOX (IMMOBILISER CODE ECU) Measure the voltage according to the value(s) in the table below. Waveform 1 Tester Connection F16-5 (EFII) - Body ground Tool Setting 5 V/DIV., 500 ms/DIV Vehicle Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Waveform 2 Tester Connection F16-6 (EFIO) - Body ground Tool Setting 5 V/DIV., 50 ms/DIV Vehicle Condition Power switch on (IG) OK The waveform is displayed as shown in illustration. TEXT IN ILLUSTRATION *1 Component with harness connected (Power Management Control ECU) NG --> REPLACE ID CODE BOX (IMMOBILISER CODE ECU) OK: Go to next step
  11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID VEHICLE CONTROL ECU) See step 3 NG --> See step 19 OK: Go to next step
  12. CHECK POWER MANAGEMENT CONTROL ECU See step 4 NG --> See step 28 OK --> See step 29
  13. INSPECT STOP LIGHT SWITCH ASSEMBLY See step 3 NG --> See step 30 OK: Go to next step
  14. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) OK --> See step 31
  15. REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Replace the transmission control ECU assembly. Refer to «REMOVAL»(ref-398214-S32691384452011051600000) . NEXT: Go to next step
  16. CHECK HYBRID SYSTEM (READY ON) Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> REPLACE ID CODE BOX (IMMOBILISER CODE ECU) OK --> END (TRANSMISSION CONTROL ECU ASSEMBLY WAS DEFECTIVE)
  17. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Replace the certification ECU (smart key ECU assembly). Refer to «REMOVAL»(ref-398251-S14180786362011051600000) . NEXT: Go to next step
  18. CHECK HYBRID SYSTEM (READY ON) Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> REPLACE ID CODE BOX (IMMOBILISER CODE ECU) OK --> END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)
  19. REPAIR OR REPLACE HARNESS AND CONNECTOR Repair or replace the harness or connector. NEXT: Go to next step
  20. CHECK POWER MANAGEMENT CONTROL ECU See step 4 NG --> REPLACE POWER MANAGEMENT CONTROL ECU OK: Go to next step
  21. CHECK HYBRID SYSTEM READY ON Place the electrical key on the driver seat. Depress the brake pedal. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid system turns on (READY). OK Power source mode becomes on (READY). NG --> CHECK RELAY CONTACT SIDE CIRCUIT OK --> See step 32
  22. GO TO LIN COMMUNICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398321-S18993057102011051600000)
  23. GO TO HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000)
  24. GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398093-S16544608052011051600000)
  25. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG and ACC)). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-398334-S13873451092011051600000)
  26. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG)). Refer to «Power Source Mode does not Change to ON (IG)»(ref-398334-S16100893072011051600000)
  27. GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (ACC)). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-398334-S03404650452011051600000)
  28. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  29. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398094-S33423791982011051600000)
  30. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-398250-S36734027602011051600000)
  31. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  32. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to «REMOVAL»(ref-398232-S36824664312011051600000)

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