Smart Access System (Keyless Start) (Diagnostic Codes & Symptom Tests): Overview Lexus ES XV40 facelift

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1. CHECK POWER SOURCE MODE CHANGE FUNCTION Check the function of the engine switch. Check that power source mode changes in accordance with the conditions of the shift position and brake pedal. Brake Pedal Shift Lever Power Source Mode Pattern Depressed P or N Position When the engine switch is pushed once. off --> engine start on (ACC) --> engine start on (IG) --> engine start Not depressed P position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> off Except P Position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> on (ACC) - P Position When the engine switch is pushed with power source mode on (IG) (engine running). on (IG) --> off - Except P Position When the engine switch is pushed with power source mode on (IG) (engine running). on (IG) --> on (ACC) Check if power source mode changes without pressing the engine switch. With power source mode on (ACC) and the shift position in P, wait for at least 1 hour. Check that power source mode changes from on (ACC) to off automatically.
2. CHECK INDICATOR CONDITION Check the indicator on the engine switch. Check that the engine switch indicator turns on and changes color according to the table below. Power Source Mode/Condition Indicator Light Condition Brake pedal released Brake pedal depressed, shift lever in P or N off OFF ON (Green) (When key and vehicle IDs match) on (ACC, IG) ON (Amber) ON (Green) Engine running OFF OFF Steering lock not unlocked Flashes (Green) for 15 sec. Flashes (Green) for 15 sec. System malfunction Flashes (Amber) for 15 sec. Flashes (Amber) for 15 sec.

DESCRIPTION

This DTC is output when a problem such as an open in the AM2 fuse, an open or short in the wire harness between the fuse and main body ECU, a short in the IG output circuit inside the main body ECU, a short between the main body ECU and relay, and a short in the relay is detected.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. CHECK DTC OUTPUT Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). HINT: After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG). Check for DTCs again. OK No DTC is output. NG --> See step 2 OK --> CHECK INTERMITTENT PROBLEMS
2. INSPECT FUSE (AM2) Remove the AM2 fuse from the engine room J/B. Measure the resistance of the fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) Disconnect the E60 and E61 ECU connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. (Symbol) Condition Specified Condition E61-6 (AM1) - Body ground Always 10 to 14 V E60-1 (AM2) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU

This DTC is output when there is a problem in the IG1D output circuit, which is from the inside of the main body ECU to the IG1 relay.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Select the item below in the Data List, and read the display on the tester. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG1 Relay Monitor (Outside) Status of IG1 relay monitor (outer) / ON or OFF ON: Engine switch on (IG) (IG1 relay is ON) OFF: Engine switch off (IG1 relay is OFF) - ON "ON" (engine switch on (IG)) appears on the screen. NG --> See step 3 OK: Go to next step
2. CHECK ENGINE SWITCH CONDITION Check the power source mode change. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows: OK off --> on (ACC) --> on (IG) --> off HINT: If power mode does not change to ON (IG and ACC). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-396672-S15621182142011050900000). If power mode does not change to ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-396672-S22396388152011050900000). NG --> GO TO OTHER PROBLEM OK: Go to next step
3. INSPECT RELAY (IG1 RELAY) Remove the IG1 relay from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
4. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU) Disconnect the DI J/B connector. Disconnect the E61 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition DI-9 - E61-3 (IG1D) Always Below 1 ohms E61-3 (IG1D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND) Disconnect the DF and DA J/B connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified value DF-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. Condition Specified value DA-1 - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT INSTRUMENT PANEL J/B Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified value DF-10 - IG1 relay terminal-1 Always Below 1 ohms Dl-9 - IG1 relay terminal-2 Always Below 1 ohms DF-10 - Body ground Always 10 kohms or higher Dl-9 - Body ground Always 10 kohms or higher NG --> REPLACE INSTRUMENT PANEL J/B OK --> REPLACE MAIN BODY ECU

This DTC is output when there is a problem in the IG2D output circuit, which is from the inside of the main body ECU to the IG2 relay.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Read the Data List according to the displays on the tester. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG2 Relay Monitor (Outside) Status of IG2 relay monitor (outer) / ON or OFF ON: Engine switch on (IG) (IG2 relay is ON) OFF: Engine switch off (IG2 relay is OFF) - OK "ON" (Engine switch on (IG)) appears on the screen. NG --> See step 3 OK: Go to next step
2. CHECK ENGINE SWITCH CONDITION Check the power source mode change. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows: OK off --> on (ACC) --> on (IG) --> off HINT: If power mode does not change to ON (IG and ACC). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-396672-S15621182142011050900000). If power mode does not change to ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-396672-S22396388152011050900000). If power mode does not change to ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-396672-S23107613032011050900000). NG --> GO TO OTHER PROBLEM OK: Go to next step
3. INSPECT RELAY (IG2 RELAY) Remove the IG2 relay from the engine room R/B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
4. CHECK WIRE HARNESS (ENGINE ROOM R/B - MAIN BODY ECU AND BODY GROUND) Remove the IG2 relay from the engine room R/B. Disconnect the E60 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition Engine Room R/B IG2 relay terminal 1 - E60-11 (IG2D) Always Below 1 ohms Engine Room R/B IG2 relay terminal 2 - Body ground Always Below 1 ohms E60-11 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU

This DTC is output when there is a problem in the ACCD output circuit, which is from the inside of the main body ECU to the ACC relay.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Read the Data List according to the displays on the tester. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note ACC Relay Monitor Status of ACC Relay Monitor / ON or OFF ON: Engine switch on (ACC) OFF: Engine switch off - OK "ON" (engine switch on (ACC)) appears on the screen. NG --> See step 3 OK: Go to next step
2. CHECK ENGINE SWITCH CONDITION Check the power source mode change. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows: OK off --> on (ACC) --> on (IG) --> off HINT: If power mode does not change to ON (IG and ACC). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-396672-S15621182142011050900000). If power mode does not change to ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-396672-S22396388152011050900000). If power mode does not change to ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-396672-S23107613032011050900000). NG --> GO TO OTHER PROBLEM OK: Go to next step
3. INSPECT RELAY (ACC RELAY) Remove the ACC relay from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
4. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU) Disconnect the E61 ECU connector. Disconnect the DI J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition DI-3 - E61-22 (ACCD) Always Below 1 ohms E61-22 (ACCD) or DI-3 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND) Disconnect the DF and DA J/B connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition DF-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. Condition Specified Condition DA-1 - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT INSTRUMENT PANEL J/B Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition ACC relay terminal 1 - DF-10 Always Below 1 ohms ACC relay terminal 2 - DI-3 Always Below 1 ohms DF-10 - Body ground Always 10 kohms or higher DI-3 - Body ground Always 10 kohms or higher NG --> REPLACE INSTRUMENT PANEL J/B OK --> REPLACE MAIN BODY ECU

This DTC is output when there is an open, short, or any other problem in the engine start request output circuit inside the main body ECU or in the external circuit.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. CHECK DTC OUTPUT Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). HINT: After all DTCs are cleared, turn the engine switch on (IG) and depress the brake pedal. After 15 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. OK No DTC is output. NG --> See step 2 OK --> CHECK INTERMITTENT PROBLEMS
2. CHECK WIRE HARNESS (MAIN BODY ECU - ECM) Disconnect the E58 ECU connector. Disconnect the A10 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition E58-4 (STSW) - A10-14 (STSW) Always Below 1 ohms E58-4 (STSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT MAIN BODY ECU Reconnect the connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. (Symbol) Condition Specified Condition E58-4 (STSW) - Body ground Brake pedal depressed, Engine switch hold on (ST) Output voltage at terminal AM1 or AM2 is -2 V or more. NG --> REPLACE MAIN BODY ECU OK: Go to next step
4. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine can start. Make sure the brake pedal is depressed and the shift position is P at this time. Check that the engine switch mode can be changed by pushing the engine switch. HINT: Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status. OK Engine can start normally. HINT: If engine does not start. Refer to «Engine does not Start»(ref-396672-S23353668512011050900000). NG --> GO TO OTHER PROBLEM OK --> END (MAIN BODY ECU DEFECTIVE)

This DTC is output when the ACCR output circuit inside the main body ECU is open or shorted.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. CHECK DTC OUTPUT Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). HINT: After all DTCs are cleared, check if the trouble occurs again 50 seconds after the engine switch is turned on (IG). Check for DTCs again. OK No DTC is output. NG --> See step 2 OK --> CHECK INTERMITTENT PROBLEMS
2. CHECK WIRE HARNESS (MAIN BODY ECU - ECM) Disconnect the E60 ECU connector. Disconnect the A10 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition E60-3 (ACCR) - A10-13 (ACCR) Always Below 1 ohms E60-3 (ACCR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT MAIN BODY ECU Reconnect the connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. (Symbol) Condition Specified Condition E60-3 (ACCR) - Body ground Brake pedal depressed, shift P position, engine switch is pushed once --> on (IG) 0.1 to 0.8 V (*1) Output voltage at terminal AM1 or AM2 is -2 V or more. HINT: *1: Voltage is output only when the engine is cranking. NG --> REPLACE MAIN BODY ECU OK: Go to next step
4. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine starts. Make sure the brake pedal is depressed and the shift position is P at this time. Check that the engine switch mode can be changed by pushing the engine switch. HINT: Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status. OK Engine can start normally. HINT: If engine does not start. Refer to «Engine does not Start»(ref-396672-S23353668512011050900000). NG --> GO TO OTHER PROBLEM OK --> END (MAIN BODY ECU DEFECTIVE)

This DTC is output when the submersion circuit monitor inside the main body ECU detects that the vehicle is submerged in water.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

This DTC is output when 1) a malfunction is detected between the main body ECU and the engine switch; or 2) either of the switches inside the engine switch is malfunctioning.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. READ VALUE USING TECHSTREAM (START SWITCH) Connect Techstream to the DLC3. Check the DATA LIST for proper functioning of the start switch. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch 1 Start Switch 1/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Start Switch 2 Start Switch 2/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK ON (engine switch on (IG)) and OFF (engine switch off) appear on the screen. NG --> See step 3 OK: Go to next step
2. CHECK ENGINE SWITCH CONDITION Check the power source mode change. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows. OK off --> on (ACC) --> on (IG) --> off HINT: If power mode does not change to ON (IG and ACC). Refer to «Power Source Mode does not Change to ON (IG and ACC)»(ref-396672-S15621182142011050900000). If power mode does not change to ON (IG). Refer to «Power Source Mode does not Change to ON (IG)»(ref-396672-S22396388152011050900000). If power mode does not change to ON (ACC). Refer to «Power Source Mode does not Change to ON (ACC)»(ref-396672-S23107613032011050900000). NG --> GO TO OTHER PROBLEM OK --> END
3. INSPECT ENGINE SWITCH Remove the engine switch. Disconnect the switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Switch Condition Specified Condition 7 (SS1) - 5 (GND) Pushed Below 1 ohms 2 (SS2) - 5 (GND) Pushed Below 1 ohms 7 (SS1) - 5 (GND) Not pushed 10 kohms or higher 2 (SS2) - 5 (GND) Not pushed 10 kohms or higher HINT: This switch is a momentary type switch. NG --> REPLACE ENGINE SWITCH OK: Go to next step
4. CHECK WIRE HARNESS (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the E61 ECU connector. Disconnect the E68 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E68-7 (SS1) - E61-17 (SSW1) Always Below 1 ohms E68-2 (SS2) - E61-16 (SSW2) Always Below 1 ohms E68-5 (GND) - Body ground Always Below 1 ohms E68-7 (SS1) or E61-17 (SSW1) - Body ground Always 10 kohms or higher E68-2 (SS2) or E61-16 (SSW2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU

The ECM and the shift lock control ECU are connected by a cable and the CAN. If the cable information and CAN information are inconsistent, this DTC will be output.

HINT

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG) and turn Techstream main switch on. Read the DATA LIST according to the displays on the tester. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift P Signal Shift P Signal / ON or OFF ON: Shift P signal ON (Shift position is P) OFF: Shift P signal OFF (Shift position is not P) - OK "ON" (P signal is ON) and "OFF" (P signal is OFF) appears on the screen. HINT: If the result is not as specified, there may be a malfunction with the shift lock control ECU. Refer to «ON-VEHICLE INSPECTION»(/lexus/es/xv40-facelift-2009-2012/remont/automatic-trans/#shift-lock-system-inspection). NG --> See step 2 OK --> GO TO «AUTOMATIC TRANSAXLE SYSTEM»(ref-396631-S36777929852011050900000) SHIFT CONTROL SYSTEM
2. CHECK WIRE HARNESS (MAIN BODY ECU - SHIFT LOCK CONTROL ECU) Disconnect the E58 and E77 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition E58-2 (P) - E77-11 (P2) Always Below 1 ohms E58-2 (P) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine can start normally. Make sure the brake pedal is depressed and the shift position is P at this time. Check that the engine switch mode can be changed by pushed the engine switch. HINT: Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status. OK Engine can start normally. HINT: If engine does not start. Refer to «Engine does not Start»(ref-396672-S23353668512011050900000). NG --> GO TO OTHER PROBLEM OK --> END (MAIN BODY ECU DEFECTIVE)

The main body ECU and the combination meter are connected by a cable and the CAN. DTC B2282 is output when: 1) the cable information and CAN information are inconsistent; and 2) a malfunction is detected between the vehicle speed sensor and combination meter.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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HINT

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
2. If a short occurs in an ECU, all systems in the diagram above will not operate normally.

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1. CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check if the function of the speedometer in the combination meter is normal. OK Actual vehicle speed and the speed indicated on the speedometer are the same. HINT: The vehicle speed sensor is functioning normally when the indication on the speedometer is normal. The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication lines. The vehicle speed sensor detects the voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage. OK --> See step 3 NG: Go to next step
2. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). Check for CAN communication system DTCs. HINT: If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396655-S36530604142011050900000). OK No DTC is output. NG --> GO TO «CAN COMMUNICATION SYSTEM»(ref-396655-S21766391472011050900000) CAN COMMUNICATION SYSTEM OK --> GO TO «METER / GAUGE SYSTEM»(ref-396653-S34394955792011050900000) COMBINATION METER SYSTEM
3. CHECK WIRE HARNESS (MAIN BODY ECU - COMBINATION METER) Disconnect the E59 ECU connector. Disconnect the E20 meter connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E59-9 (SPD) - E20-12 (+S) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (MAIN BODY ECU - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E59-9 (SPD) - Body ground Always 10 kohms or higher HINT: If the result of the inspection for a short circuit is not as specified, there may be a short in the ECU. NG --> REPAIR OR REPLACE HARNESS, CONNECTOR OR EACH ECU OK: Go to next step
5. INSPECT MAIN BODY ECU (SPEED SIGNAL) Check the input signal waveform. Reconnect the connectors. Remove the combination meter assembly with the connector(s) still connected. Connect an oscilloscope to terminal E59-9 (SPD) and body ground. Turn the engine switch on (IG). Turn the wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Tool setting 5 V/DIV., 10 ms./DIV. Vehicle condition Driving at approx. 20 km/h (12 mph) OK The waveform is displayed as shown in the illustration. HINT: As the vehicle speed increases, the cycle of the signal waveform narrows. NG --> REPLACE COMBINATION METER OK --> REPLACE MAIN BODY ECU

The skid control ECU converts these signals into 4-pulse signals and sends them to the combination meter. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the main body ECU. The main body ECU determines the vehicle speed based on the frequency of these pulse signals.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

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HINT

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
2. If a short occurs in an ECU, all systems in the diagram above will not operate normally.

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Scheme 100

1. CHECK DTC OUTPUT (SMART ACCESS SYSTEM WITH PUSH-BUTTON START) Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). After all DTCs are cleared, check if the trouble occurs again 320 seconds after the engine switch is turned on (IG). Check for DTC B2282 (Vehicle speed signal malfunction) and DTC B2283 (Vehicle speed sensor malfunction). Result Display (DTC output) Proceed to "DTC B2283" only A "DTC B2283" and "DTC B2282" B No DTC C HINT: If DTC B2282 and DTC B2283 are output, perform troubleshooting for DTC B2282 first. Refer to «DTC B2282: Vehicle Speed Signal Malfunction»(ref-396672-S23178851012011050900000). C --> CHECK INTERMITTENT PROBLEMS B --> GO TO «DTC B2282: Vehicle Speed Signal Malfunction»(ref-396672-S23178851012011050900000) DTC B2282 A: Go to next step
2. CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check if the function of the speedometer in the combination meter is normal. OK Actual vehicle speed and the speed indicated on the speedometer are the same. HINT: The vehicle speed sensor is functioning normally when the indication on the speedometer is normal. The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication lines. The vehicle speed sensor detects the voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage. OK --> See step 4 NG: Go to next step
3. CHECK DTC OUTPUT (BRAKE CONTROL) Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396665-S26165806482011050900000). Check for DTCs. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396665-S25304334152011050900000). OK No DTC is output. NG --> GO TO «BRAKE CONTROL (SERVICE INFORMATION)»(ref-396686) BRAKE CONTROL SYSTEM OK --> REPLACE MAIN BODY ECU
4. CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER) Disconnect the E20 meter connector. Disconnect the A36 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition A36-12 (SP1) - E20-14 (SI) Always Below 1 ohms A36-12 (SP1) or E20-14 (SI) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT MAIN BODY ECU (SPEED SIGNAL) Check the input signal waveform. Reconnect the connectors. Remove the combination meter assembly with the connector(s) still connected. Connect an oscilloscope to terminal E20-14 (SI) and body ground. Turn the engine switch on (IG). Turn the wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Tool setting 5 V/DIV., 10 ms./DIV. Vehicle condition Driving at approx. 20 km/h (12 mph) OK The waveform is displayed as shown in the illustration. HINT: As the vehicle speed increases, the cycle of the signal waveform narrows. NG --> REPLACE SKID CONTROL ECU OK --> REPLACE COMBINATION METER

This DTC is output when: 1) the brake signal circuit between the main body ECU and the stop light switch is malfunctioning; and 2) the CAN information is inconsistent.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 101

This DTC is output when serial communication signals and LIN communication signals in the circuit between the main body ECU and steering lock actuator (steering lock ECU) are inconsistent.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU or steering lock ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 102

Scheme 103

1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Check the DATA LIST for proper functioning of the steering lock function. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Steering Unlock Switch Steering lock condition/ON or OFF ON: Steering is unlocked (Engine switch on (ACC)) OFF: Steering is locked (Engine switch off) - OK ON (steering is unlocked) and OFF (steering is locked) appear on the screen. NG --> See step 3 OK: Go to next step
2. CHECK FOR DTCS Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). Check for DTC B2285 (Steering lock position signal circuit malfunction) and DTC B2287 (LIN communication master malfunction) and DTC B2785 (Communication malfunction between ECUs connected by LIN). Result Display (DTC output) Proceed to "DTC B2285" only A "DTC B2287" and/or "DTC B2785" B No DTC C HINT: If DTC B2287 is output. Refer to «DTC B2287: LIN Communication Master Malfunction»(ref-396672-S21024527742011050900000). If DTC B2285 is output. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-396675-S38751650252011050900000). C --> CHECK INTERMITTENT PROBLEMS B --> GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-396677-S17488696542011050900000) DTC CHART A --> REPLACE MAIN BODY ECU
3. CHECK WIRE HARNESS (MAIN BODY ECU - STEERING LOCK ECU) Disconnect the E61, DR and E78 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E61-18 (SLP) - E78-4 (SLP1) Always Below 1 ohms DR-9 (LIN1) - E78-5 (LIN) Always Below 1 ohms E61-18 (SLP) or E78-4 (SLP1) - Body ground Always 10 kohms or higher DR-9 (LIN1) or E78-5 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine starts. Make sure the brake pedal is depressed and the shift position is P at this time. Check that the engine switch mode can be changed by pushing the engine switch. HINT: Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status. OK Engine can start normally. NG --> REPLACE STEERING LOCK ECU OK --> END (MAIN BODY ECU DEFECTIVE)

This DTC is output when serial communication signals and CAN communication signals in the circuit between the main body ECU and ECM are inconsistent.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 104

Scheme 105

1. CHECK OPERATION OF TACHOMETER Run the engine and check if the function of the tachometer in the combination meter is normal. OK Actual engine revolution speed and the revolution indicated on the tachometer are the same. OK --> See step 3 NG: Go to next step
2. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Delete the DTC. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). Check for the CAN communication system DTC U0146. HINT: If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396655-S36530604142011050900000). OK No DTC is output. NG --> GO TO «CAN COMMUNICATION SYSTEM»(ref-396655-S21766391472011050900000) CAN COMMUNICATION SYSTEM OK --> GO TO «METER / GAUGE SYSTEM»(ref-396653-S34394955792011050900000) COMBINATION METER SYSTEM
3. CHECK WIRE HARNESS (MAIN BODY ECU - ECM) Disconnect the A10 ECM connector. Disconnect the E59 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E59-8 (TACH) - A10-15 (TACH) Always Below 1 ohms E59-8 (TACH) or A10-15 (TACH) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. READ VALUE USING TECHSTREAM Reconnect the connectors. Connect Techstream to the DLC3. Check the DATA LIST for proper functioning of the engine. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Condition Engine condition/STOP or RUN STOP: Engine is stopped RUN: Engine is running - OK STOP (engine is stopped) and RUN (engine is running) appear on the screen. NG --> REPLACE ECM OK --> REPLACE MAIN BODY ECU

This DTC is output when there is a LIN communication problem between the main body ECU and certification ECU.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU or certification ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 106

Scheme 107

Scheme 108

1. CHECK FOR DTCS Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). Check for DTC B2287 (LIN communication master malfunction) and B2785 (Communication malfunction between ECUs connected by LIN). Result Display (DTC output) Proceed to "DTC B2287" only A "DTC B2287" and "DTC B2785" B No DTC C HINT: If DTC B2785 is output, perform troubleshooting for DTC B2785 first. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-396675-S38751650252011050900000). C --> CHECK INTERMITTENT PROBLEMS B --> GO TO «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-396675-S38751650252011050900000) DTC B2785 A: Go to next step
2. CHECK WIRE HARNESS (MAIN BODY ECU - CERTIFICATION ECU) Disconnect the E13 and DR ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition DR-9 (LIN1) - E13-10 (LIN) Always Below 1 ohms DR-9 (LIN1) or E13-10 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine starts. OK Engine can start normally. NG --> REPLACE CERTIFICATION ECU OK --> END (MAIN BODY ECU DEFECTIVE)

This DTC is output when the main body ECU cannot detect the unlock condition of the steering lock within a specified time.

HINT

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 109

Scheme 110

1. CHECK FOR DTCS Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG). Check for DTCs again. OK DTC B2785 (Communication malfunction between ECUs connected by LIN), DTC B2287 (LIN communication master malfunction) and DTC B2781 (Open/short in steering lock ECU) are not output. HINT: If DTC B2785 is output. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-396675-S38751650252011050900000). If DTC B2287 is output. Refer to «DTC B2287: LIN Communication Master Malfunction»(ref-396672-S21024527742011050900000). If DTC B2281 is output. Refer to «DTC B2281: "P" Signal Malfunction»(ref-396672-S04487690392011050900000). NG --> GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-396677-S17488696542011050900000) DTC CHART OK: Go to next step
2. CHECK WIRE HARNESS (MAIN BODY ECU - STEERING LOCK ECU) Disconnect the E61 and E78 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E61-18 (SLP) - E78-4 (SLP1) Always Below 1 ohms E61-18 (SLP) or E78-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK MAIN BODY ECU OPERATION After replacing the main body ECU with a normally functioning ECU, check that the engine starts. OK Steering lock/unlock function operates normally. HINT: If steering lock/unlock function does not operate, refer to PROBLEM SYMPTOMS TABLE of the electrical steering lock (steering wheel cannot be unlocked). Refer to «PROBLEM SYMPTOMS TABLE»(ref-396676-S04371110662011050900000). NG --> GO TO «STEERING LOCK SYSTEM»(ref-396676-S38173023532011050900000) ELECTRIC STEERING LOCK OK --> END (MAIN BODY ECU DEFECTIVE)

This DTC is output when there is a LIN communication problem between the main body ECU and certification ECU or when there is a problem in the engine immobilizer system.

HINT

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system. Refer to REGISTRATION.

Scheme 111

Scheme 112

Engine start conditions or system malfunctions can be checked by the status of the engine switch indicator light.

ENGINE SWITCH INDICATOR LIGHT CONDITION

Scheme 113

Scheme 114

Scheme 115

1. INSPECT ENGINE SWITCH Remove the engine switch. Apply battery voltage between the terminals of the switch, and check the illumination condition of the switch. NOTE: If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator will not illuminate. If the voltage is too low, the indicator will not illuminate. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 11 (SWIL) Battery negative (-) --> Terminal 4 (COM) or 5 (GND) Illuminates Battery positive (+) --> Terminal 12 (INDS) Battery negative (-) --> Terminal 4 (COM) or 5 (GND) Illuminates Battery positive (+) --> Terminal 13 (INDW) Battery negative (-) --> Terminal 4 (COM) or 5 (GND) Illuminates NG --> REPLACE ENGINE SWITCH OK: Go to next step
2. CHECK WIRE HARNESS (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the E68 switch connector. Disconnect the E61 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E68-11 (SWIL) - E61-25 (SWIL) Always Below 1 ohms E68-12 (INDS) - E61-15 (INDS) Always Below 1 ohms E68-13 (INDW) - E61-14 (INDW) Always Below 1 ohms E68-5 (GND) - Body ground Always Below 1 ohms E68-4 (COM) - Body ground Always Below 1 ohms E68-11 (SWIL) or E61-25 (SWIL) - Body ground Always 10 kohms or higher E68-12 (INDS) or E61-15 (INDS) - Body ground Always 10 kohms or higher E68-13 (INDW) or E61-14 (INDW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU

When the engine switch is pushed with the electrical key in the cabin, the main body ECU receives signals to switch the power source mode.

HINT

To allow use of Techstream to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the main body ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

Scheme 116

Scheme 117

Scheme 118

Scheme 119

Scheme 120

Scheme 121

1. INSPECT FUSE (AM2) Remove the AM2 fuse from the engine room J/B. Measure the resistance of the fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK CONNECTORS Install the fuse. Check that the connectors are securely connected and the terminals are not deformed or loose. OK The connectors are securely connected and the terminals are not deformed or loose. NG --> REPAIR OR REPLACE CONNECTORS OK: Go to next step
3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) Disconnect the E60 and E61 ECU connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection (Symbols) Condition Specified Condition E61-6 (AM1) - Body ground Always 10 to 14 V E60-1 (AM2) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (MAIN BODY ECU - BODY GROUND) Disconnect the DF ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition DF-10 (GND1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK ENTRY FUNCTION DETECTION AREA Reconnect the connectors. Inspect entry detection area. When the electrical key is in either of the 2 inspection points in the illustration, the shift lever is in the P position and the brake pedal is depressed, check that the engine switch indicator illuminates in green. OK Engine switch illuminates in green. HINT: If the engine switch does not illuminate, perform troubleshooting according to the PROBLEM SYMPTOMS TABLE of the smart access system with push-button start (starting) (engine switch indicator light does not come on). Refer to «PROBLEM SYMPTOMS TABLE»(ref-396671-S00595910712011050900000) and the smart access system with push-button start (Door lock) (matching for inside of the cabin cannot be performed). Refer to «PROBLEM SYMPTOMS TABLE»(ref-396677-S10960584872011050900000). NG --> GO TO OTHER PROBLEM OK: Go to next step
6. CHECK FOR DTCS Delete the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396671-S26133780132011050900000). HINT: After all the DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG). Check for DTCs again. HINT: If the DTCs for the smart access system with push-button start malfunction are output, inspect those DTCs first. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396671-S05102136312011050900000). OK No DTC is output. NG --> GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-396677-S17488696542011050900000) DTC CHART OK: Go to next step
7. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG). Check the DATA LIST for proper functioning of the start switches 1 and 2. HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts. MAIN BODY: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch 1 Start Switch 1/ON or OFF ON: Engine switch is pushed OFF: Engine switch is not pushed - Start Switch 2 Start Switch 2/ON or OFF ON: Engine switch is pushed OFF: Engine switch is not pushed - OK ON (engine switch is pushed) and OFF (engine switch is not pushed) appear on the screen. OK --> REPLACE MAIN BODY ECU NG: Go to next step
8. INSPECT ENGINE SWITCH Remove the engine switch. Measure the resistance of the switch. Standard resistance Tester Connection Switch Condition Specified Condition 7 (SS1) - 5 (GND) Pushed Below 1 ohms 2 (SS2) - 5 (GND) Pushed Below 1 ohms 7 (SS1) - 5 (GND) Not pushed 10 kohms or higher 2 (SS2) - 5 (GND) Not pushed 10 kohms or higher NG --> REPLACE ENGINE SWITCH OK: Go to next step
9. CHECK WIRE HARNESS (MAIN BODY ECU AND BODY GROUND - ENGINE SWITCH) Disconnect the E61 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition E68-7 (SS1) - E61-17 (SSW1) Always Below 1 ohms E68-2 (SS2) - E61-16 (SSW2) Always Below 1 ohms E68-5 (GND) - Body ground Always Below 1 ohms E68-7 (SS1) or E61-17 (SSW1) - Body ground Always 10 kohms or higher E68-2 (SS2) or E61-16 (SSW2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU

When the engine switch is pushed with the electrical key in the cabin, the main body ECU receives signals to switch the power source mode.

HINT

To allow use of Techstream to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the main body ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

Scheme 122

Scheme 123

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

1. INSPECT FUSE (AM2) Remove the AM2 fuse from the engine room J/B. Measure the resistance of the fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK CONNECTORS Check that the connectors are securely connected and the terminals are not deformed or loose. OK The connectors are securely connected and the terminals are not deformed or loose. NG --> REPAIR OR REPLACE CONNECTORS OK: Go to next step
3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) Disconnect the E60 and E61 ECU connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection (Symbols) Condition Specified Condition E61-6 (AM1) - Body ground Always 10 to 14 V E60-1 (AM2) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (MAIN BODY ECU - BODY GROUND) Disconnect the DF ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition DF-10 (GND1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT RELAY (IG2 RELAY) Remove the IG2 relay from the engine room R/B No. 2. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (When battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
6. CHECK WIRE HARNESS (ENGINE ROOM R/B - MAIN BODY ECU AND BODY GROUND) Remove the IG2 relay from the engine room R/B. Disconnect the E60 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Specified Condition Engine room R/B IG2 relay terminal 1 - E60-11 (IG2D) Below 1 ohms Engine room R/B IG2 relay terminal 2 - Body ground Below 1 ohms E60-11 (IG2D) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. INSPECT RELAY (IG1 RELAY) Remove the IG1 relay from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
8. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU) Disconnect the Dl J/B connector. Disconnect the E61 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition DI-9 - E61-3 (IG1D) Always Below 1 ohms E61-3 (IG1D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND) Disconnect the DF and DA J/B connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition DF-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. Condition Specified Condition DA-1 - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. INSPECT INSTRUMENT PANEL J/B Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition DF-10 - IG1 relay terminal-1 Always Below 1 ohms DI-9 - IG1 relay terminal-2 Always Below 1 ohms DF-10 - Body ground Always 10 kohms or higher DI-9 - Body ground Always 10 kohms or higher OK --> REPLACE MAIN BODY ECU NG --> REPLACE INSTRUMENT PANEL J/B

When the engine switch is pushed with the electrical key in the cabin, the main body ECU receives signals to switch the power source mode.

HINT

To allow use of Techstream to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the main body ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

Scheme 129

Scheme 130

Scheme 131

Scheme 132

Scheme 133

1. INSPECT FUSE (AM2) Remove the AM2 fuse from the engine room J/B. Measure the resistance of the fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK CONNECTORS Check that the connectors are securely connected and the terminals are not deformed or loose. OK The connectors are securely connected and the terminals are not deformed or loose. NG --> REPAIR OR REPLACE CONNECTORS OK: Go to next step
3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY) Disconnect the E60 and E61 ECU connectors. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection (Symbols) Condition Specified Condition E61-6 (AM1) - Body ground Always 10 to 14 V E60-1 (AM2) - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WIRE HARNESS (MAIN BODY ECU - BODY GROUND) Disconnect the DF ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection (Symbols) Condition Specified Condition DF-10 (GND1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT RELAY (ACC RELAY) Remove the ACC relay from the instrument panel J/B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY OK: Go to next step
6. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU) Disconnect the E61 ECU connector. Disconnect the DI J/B connector. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. (Symbol) Condition Specified Condition DI-3 - E61-22 (ACCD) Always Below 1 ohms E61-22 (ACCD) or DI-3 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND) Disconnect the DF and DA J/B connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition DF-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage Terminal No. Condition Specified Condition DA-1 - Body ground Always 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. INSPECT INSTRUMENT PANEL J/B Measure the resistance according to the value(s) in the table below. Standard resistance Terminal No. Condition Specified Condition ACC relay terminal 1 - DF-10 Always Below 1 ohms ACC relay terminal 2 - DI-3 Always Below 1 ohms DF-10 - Body ground Always 10 kohms or higher DI-3 - Body ground Always 10 kohms or higher NG --> REPLACE INSTRUMENT PANEL J/B OK --> REPLACE MAIN BODY ECU

See also:
• ON-VEHICLE INSPECTION