Starting System (Hybrid): Overview Toyota Highlander II

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 (instrument panel junction block), a short in the IG output circuit inside the main body ECU (instrument panel junction block), a short between the main body ECU (instrument panel junction block) and relay, and a short in the relay is detected.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). HINT: After all DTCs are cleared, check if the trouble occurs again 6 seconds after the power switch is turned on (IG). Check for DTCs again. OK: No DTC is output. NG: Go to step 2 OK: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) )
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - BATTERY) Disconnect the D7 and D8 ECU connectors. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D8-6 (AM1) - Body ground Always 11 to 14 V D7-1 (AM2) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR, OR FUSE OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the power 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 power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG1 Relay Monitor (Outside) Status of IG1 relay monitor (outer) /ON or OFF ON: Power switch on (IG) (IG1 relay is ON) OFF: Power switch off (IG1 relay is OFF) - OK: "ON" (power switch on (IG)) appears on the screen. NG: Go to step 4 OK: Go to next step
2. CHECK POWER 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 power switch causes the power source mode to change as follows: OK: off --> on (ACC) --> on (IG) --> off NG: GO TO OTHER FLOW CHART (See «POWER SOURCE MODE DOES NOT CHANGE»(ref-305556-S02427235952008112800000) ) OK: Go to next step
3. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). HINT: After all DTCs are cleared, turn the power switch on (IG) and depress the brake pedal. After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. OK: No DTC is output. NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) )
4. INSPECT RELAY (IG1 RELAY) Remove the IG1 relay from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3-5 When battery voltage is not applied to terminals land 2 10 kohms or higher 3-5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE IG1 RELAY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU) Disconnect the 1I junction block connector. Disconnect the D8 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1I-9-D8-3(IG1D) Always Below 1 ohms D8-3 (IG1D) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU) OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND) Disconnect the 1F and 1A junction block connectors. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1F-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1A-1 - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND) OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the power 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 power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG2 Relay Monitor (Outside) Status of IG2 relay monitor (outer) /ON or OFF ON: Power switch on (IG) (IG2 relay is ON) OFF: Power switch off (IG2 relay is OFF) - OK: "ON" (Power switch on (IG)) appears on the screen. NG: Go to step 3 OK: Go to next step
2. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). HINT: After all DTCs are cleared, turn the power switch on (IG) and depress the brake pedal. After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. OK: No DTC is output. NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) )
3. INSPECT RELAY (IG2 RELAY) Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3-5 When battery voltage is not applied to terminals land 2 10 kohms or higher 3-5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE IG2 RELAY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - MAIN BODY ECU AND BODY GROUND) Disconnect the D7 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition Engine room relay block IG2 relay terminal 1 - D7-11 (IG2D) Always Below 1 ohms D7-11 (IG2D) - Body ground Always 10 kohms or higher Engine room relay block IG2 relay terminal 2 - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream main switch on. Read the Data List according to the displays on the tester. HINT: When using Techstream with the power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note ACC Relay Monitor Status of ACC Relay Monitor/ON or OFF ON: Power switch on (ACC) OFF: Power switch off - OK: "ON" (power switch on (ACC)) appears on the screen. NG: Go to step 3 OK: Go to next step
2. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). HINT: After all DTCs cleared, turn the power switch on (IG) and depress the brake pedal. After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. OK: No DTC is output. NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) )
3. INSPECT RELAY (ACC RELAY) Remove the ACC relay from the instrument panel junction block Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kohms or higher 3-5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE ACC RELAY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the D8 connector from the main body ECU (instrument panel junction block). Disconnect the 1I connector from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1I-3 - D8-22 (ACCD) Always Below 1 ohms D8-22 (ACCD) or 1I-3 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK) OK: Go to next step
5. CHECK HARNESS AND CONNECTOR Disconnect the 1A and 1F connectors from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1F-10 - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1A-1 - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

This DTC is output when there is an open, short, or any other problem in the hybrid control system start request output circuit inside the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). HINT: After all DTCs are cleared, turn the power 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: Go to step 2 OK: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) )
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - HYBRID VEHICLE CONTROL ECU) Disconnect the D10 ECU connector. Disconnect the D35 hybrid vehicle control ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D10-4 (STSW) - D35-20 (ST2) Always Below 1 ohms D10-4 (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 D10 connector. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D10-4 (STSW) - Body ground Brake pedal depressed, Power switch hold on (ST) Output voltage at terminal AM1 or AM2 is -2 V or more. NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK: REPLACE HYBRID VEHICLE CONTROL ECU (See «REMOVAL»(/toyota/highlander/ii-2007-2010/remont/engine-control-systems/#p310-hybrid-vehicle-control-hybrid) )

This DTC is output when the submersion circuit monitor inside the main body ECU (instrument panel junction block) detects that the vehicle is submerged in water.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

This DTC is output when 1) a malfunction is detected between the main body ECU (instrument panel junction block) and the power switch; or 2) either of the switches inside the power switch is malfunctioning.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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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 power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch 1 Start Switch 1 / ON or OFF ON: Power switch is pushed OFF: Power switch is not pushed - Start Switch 2 Start Switch 2 / ON or OFF ON: Power switch is pushed OFF: Power switch is not pushed - OK: ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen. NG: Go to step 2 OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
2. INSPECT POWER SWITCH Remove the power switch (See «REMOVAL»(ref-305556-S17438305912008112800000) ). Disconnect the switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART 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 HINT: This switch is a momentary type switch. NG: REPLACE POWER SWITCH (See «POWER SWITCH»(ref-305556-S09822652262008112800000) ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the D8 ECU connector. Disconnect the D25 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D25-7 (SS1) - D8-17 (SSW1) Always Below 1 ohms D25-2 (SS2) - D8-16 (SSW2) Always Below 1 ohms D25-5 (GND) - Body ground Always Below 1 ohms D25-7 (SS1) or D8-17 (SSW1) - Body ground Always 10 kohms or higher D25-2 (SS2) or D8-16 (SSW2) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

The hybrid vehicle control ECU 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

If the main body ECU (instrument panel junction block) is replaced with a new one while the negative (-) battery terminal is connected, the power source mode will be in 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 (instrument panel junction block) is replaced, perform the registration procedure for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream main switch on. Read the DATA LIST according to the displays on the tester. Main Body: MAIN BODY REFERENCE CHART 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) appear on the screen. NG: GO TO SHIFT CONTROL SYSTEM OK: Go to next step
2. CHECK WIRE HARNESS (MAIN BODY ECU - SHIFT LOCK CONTROL ECU) Disconnect the D10 and D21 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Terminal No. (Symbol) Condition Specified Condition D10-2 (P) - D21-11 (P2) Always Below 1 ohms D10-2 (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 (instrument panel junction block) with a normally functioning ECU, check that the hybrid control system can start normally. OK: Hybrid control system can start normally. NG: REPLACE SHIFT LOCK CONTROL ECU (See «REMOVAL»(ref-305561-S36779762652008112800000) ) OK: END (MAIN BODY ECU DEFECTIVE)

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 (instrument panel junction block). The main body ECU (instrument panel junction block) determines the vehicle speed based on the frequency of these pulse signals.

The main body ECU (instrument panel junction block) and the combination meter are connected by a cable and the CAN. DTC B2282 is output when the cable information and CAN information are inconsistent.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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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 CAN COMMUNICATION SYSTEM Check for CAN communication system DTCs (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305555-S03951628302008112800000) ). HINT: If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first. Result RESULT CHART Result Proceed to CAN communication DTC is not output A CAN communication DTC is output B B: GO TO CAN COMMUNICATION SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305555-S15116636062008112800000) ) A: Go to next step
2. CHECK SPEEDOMETER OPERATION Connect Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Body Electrical / Combination Meter / Data List. Check the values by referring to the values in the table below. Combination Meter: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255km/h(158 mph) Almost same as actual speed (When driving) - OK: Vehicle speed displayed on the tester is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer). NG: GO TO METER / GAUGE SYSTEM (See «SPEEDOMETER MALFUNCTION»(ref-305557-S01164886242008112800000) ) OK: Go to next step
3. READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL) Connect Techstream to the DLC3. Turn the power switch on (IG). read the DATA LIST according to the displays on the tester screen. Body: BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Signal Vehicle speed signal / STOP or RUN Stop: Vehicle is stopped Run: Vehicle is running - OK: "Stop" (Vehicle is stopped) and "Run" (Vehicle is running) appear on the screen. NG: Go to step 4 OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - MAIN BODY ECU) Disconnect the E1 meter connector. Disconnect the D9 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D9-9 (SPD) - E1-9 (+9) Always Below 1 ohms NG: Go to step 6 OK: Go to next step
5. INSPECT COMBINATION METER ASSEMBLY Check the output waveform. Remove the combination meter with the connector(s) still connected (See «REMOVAL»(ref-305557-S38033790702008112800000) ). Connect the oscilloscope to terminals E1 -9 (+S) and body ground. Turn the power switch on (IG). Turn the wheel slowly. Check the signal waveform according to the condition(s) in the table below. VEHICLE CONDITION CHART Item Condition Tool setting 5 V/DIV., 20 ms./DIV Vehicle condition Driving at approx. 20 km/h OK: The waveform is displayed as shown in the illustration. 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: GO TO METER / GAUGE SYSTEM (See «SPEED SIGNAL CIRCUIT»(ref-305557-S02996987472008112800000) ) OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - JUNCTION CONNECTOR) Disconnect the D53 connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D9-9 (SPD) - D53-9 Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - JUNCTION CONNECTOR) OK: REPLACE JUNCTION CONNECTOR

This DTC is output when serial communication signals and CAN communication signals in the circuit between the main body ECU (instrument panel junction block) and hybrid vehicle control ECU are inconsistent.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

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1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Check for CAN communication system DTCs (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305555-S03951628302008112800000) ). HINT: If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305555-S15116636062008112800000) ). OK: DTCs for CAN communication system No DTC is output. NG: GO TO CAN COMMUNICATION SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305555-S15116636062008112800000) ) OK: Go to next step
2. CHECK DTC OUTPUT Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Check for DTCs again. Proceed to the next step based on the inspection result. Result RESULT CHART Result Proceed to No DTC is output A Engine control system DTC is output B Vehicle stability control system DTC is output C B: GO TO ENGINE CONTROL SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/highlander/ii-2007-2010/remont/testing-diagnostics/#engine-control-system-hybrid) ) C: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/highlander/ii-2007-2010/remont/anti-locktraction-control/#brake-control-hybrid) ) A: Go to next step
3. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Connect Techstream to the DLC3. Turn the power switch on (IG). Check the DATA LIST for proper functioning of the stop light switch. Main Body: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light SW Stop light switch/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - OK: ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen. NG: Go to step 4 OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
4. CHECK OPERATION OF STOP LIGHT Check whether the stop lights turn on and off normally when the brake pedal is depressed and released. OK: Stop lights turn on when brake pedal is depressed. NG: Go to step 5 OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
5. CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the 1M connector from the instrument panel junction block. Remove the stop light control relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition IM-7 - Engine room relay block stop light control relay terminal 3 Always Below 1 ohms IM-7 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK

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

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) or steering lock ECU is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

Scheme 161

Scheme 162

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 power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Steering Unlock Switch Steering lock condition / ON or OFF ON: Steering is unlocked (Power switch on (ACC)) OFF: Steering is locked (Power switch off) - OK: ON (steering is unlocked) and OFF (steering is locked) appear on the screen. NG: Go to step 3 OK: Go to next step
2. CHECK FOR DTCS Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Check for DTC B2285 (Steering lock position signal circuit malfunction), DTC B2287 (LIN communication master malfunction) and DTC B2785 (Communication malfunction between ECUs connected by LIN). Result RESULT CHART 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, perform troubleshooting for DTC B2287 first. B: GO TO DIAGNOSTIC TROUBLE CODE CHART (LIN COMMUNICATION SYSTEM) (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305538-S04349390872008112800000) ) C: USE SYMPTOM METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305531-S33540027922008112800000) ) A: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU) Disconnect the D8, 1E and D11 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D8-18 (SLP) - D11-4 (SLP1) Always Below 1 ohms 1E-7 (LIN1) - D11-5 (LIN) Always Below 1 ohms D8-18 (SLP) or D11-4 (SLP1) - Body ground Always 10 kohms or higher 1E-7 (LIN1) or D11-5 (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 (instrument panel junction block), check that the hybrid control system starts. Make sure the brake pedal is depressed and the shift position is P at this time. Check that the power switch mode can be changed by pushing the power switch. HINT: Without depressing the brake pedal, push the power switch repeatedly. Power switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the power switch repeatedly. Power switch mode should turn to on (READY) from any status. OK: Hybrid control system starts normally. NG: REPLACE STEERING LOCK ECU (See «REMOVAL»(ref-305532-S31936471212008112800000) ) 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 (instrument panel junction block) and hybrid vehicle control ECU are inconsistent.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

Scheme 163

Scheme 164

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Check for CAN communication system (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-305555-S03951628302008112800000) ). HINT: If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305555-S15116636062008112800000) ). OK: No DTC is output. NG: GO TO CAN COMMUNICATION SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305555-S15116636062008112800000) ) OK: Go to next step
2. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Check the DATA LIST for proper functioning of the engine. HINT: When using Techstream with the power 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: MAIN BODY REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ready signal Hybrid control system start request signal monitor / ON or OFF ON: Hybrid control system is ON (READY) OFF: Hybrid control system is OFF - OK: Display on tester changes according to power switch condition NG: Go to step 3 OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - HYBRID VEHICLE CONTROL ECU) Disconnect the D35 hybrid vehicle control ECU connector. Disconnect the D9 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D9-8 (RDY) - D35-12 (RDY) Always Below 1 ohms D9-8 (RDY) or D35-12 (RDY) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

Refer to DTC B2287 (See DESCRIPTION ).

DTC DETECTION CONDITION CHART

This DTC is output when the main body ECU (instrument panel junction block) cannot detect the unlock condition of the steering lock within a specified time.

HINT

When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

Scheme 165

This DTC is output when there is a LIN communication problem between the main body ECU (instrument panel junction block) and certification ECU (smart key ECU assembly) or when there is a problem in the entry function.

HINT

If the main body ECU (instrument panel junction block) is replaced with a new one while the negative (-) battery terminal is connected, the power source mode will be in 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 (instrument panel junction block) is replaced, perform the registration procedure for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION CHART

Scheme 166

Scheme 167

Scheme 168

1. CHECK FOR DTC Check for DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Proceed to the next step based on the inspection result. Result RESULT CHART Result Proceed to DTC B2289 only A LIN communication system DTCs are output B Engine immobilizer system DTCs are output C B: GO TO DIAGNOSTIC TROUBLE CODE CHART (LIN COMMUNICATION SYSTEM) (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305538-S04349390872008112800000) ) C: GO TO DIAGNOSTIC TROUBLE CODE CHART (ENGINE IMMOBILISER SYSTEM) (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-305550-S21800875012008112800000) ) A: Go to next step
2. CHECK SMART KEY SYSTEM Remove the battery of the electrical key transmitter (See «REMOVAL»(ref-305569-S00470151882008112800000) ). Touch the logo side mark of the key or card key to the power switch. Check that the power switch can be turned on (IG). OK: Power source mode is turned on NG: Go to step 3 OK: GO TO SMART KEY SYSTEM (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) (See «ROOM OSCILLATOR DOES NOT RECOGNIZE KEY»(ref-305569-S37253614602008112800000) )
3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - CERTIFICATION ECU) Disconnect the D40 and 1E connectors. Measure the resistance according to the value(s) in table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1E-7 (LIN) - D40-10 Always Below 1 ohms 1E-7 (LIN) or D40-10 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE MAIN BODY ECU Replace main body ECU.
5. CHECK FOR DTCS Delete the DTCs (See «DTC CHECK / CLEAR»(ref-305556-S28857136832008112800000) ). Check for DTC B2289 (Key collection waiting time over). OK: DTC B2289 is not output. NG: Go to step 6 OK: END
6. REPLACE CERTIFICATION ECU (SMART KEY ECU) Replace certification ECU (smart key ECU) (See «REMOVAL»(ref-305550-S36294301182008112800000) ).
7. KEY REGISTRATION Register the key (See «REGISTRATION»(ref-305550-S24536245772008112800000) ). NEXT: END

When the power switch is pushed with the electrical key in the cabin, the main body ECU (instrument panel junction block) receives signals to switch the power source mode.

HINT

To allow use of Techstream to inspect the push-button start function when the power 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 (instrument panel junction block). (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

Scheme 169

Scheme 170

Scheme 171

Scheme 172

Scheme 173

Scheme 174

1. CHECK SMART KEY SYSTEM Remove the battery of the electrical key transmitter (See «REMOVAL»(ref-305569-S00470151882008112800000) ). Touch the logo side mark of the key or card key to the power switch. Check that the power switch can be turned on (IG). Result RESULT CHART Result Proceed to Power source mode does not change to on (ACC) A Power source mode does not change to on (IG) B Power source mode does not change to on (IG and ACC) C Power source mode is turned on D B: Go to step 4 C: Go to step 10 D: GO TO SMART KEY SYSTEM (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) (See «ROOM OSCILLATOR DOES NOT RECOGNIZE KEY»(ref-305569-S37253614602008112800000) ) A: Go to next step
2. INSPECT ACC RELAY Remove the ACC relay from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3-5 When battery voltage is not applied to terminals land 2 10 kohms or higher 3-5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE ACC RELAY OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the D8 connector from the main body ECU (instrument panel junction block). Disconnect the 1I connector from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D8-22 (ACCD) - 1I-3 Always Below 1 ohms D8-22 (ACCD) or 1I-3 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
4. INSPECT IG1 RELAY Remove the IG1 relay from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3-5 When battery voltage is not applied to terminals land 2 10 kohms or higher 3-5 When battery voltage is applied to terminal 1 and 2 Below 1 ohms NG: REPLACE IG1 RELAY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the D8 connector from the main body ECU (instrument panel junction block). Disconnect the 1I connector from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D8-3 (IG1D) - 1I-9 Always Below 1 ohms D8-3 (IG1D) or 1I-9-Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT IG2 RELAY Remove the IG2 relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 3-5 When battery voltage is not applied to terminals land 2 10 kohms or higher 3-5 When battery voltage is applied to terminal 1 and 2 Below 1 ohms NG: REPLACE IG2 RELAY OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IG2 RELAY) Disconnect the D7 connector from the main body ECU (instrument panel junction block). Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D7-11 (IG2D) - Engine room relay block IG2 relay terminal 1 Always Below 1 ohms D7-11 (IG2D) or Engine room relay block IG2 relay terminal 1 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (BATTERY - IG2 RELAY) Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition Engine room relay block IG2 relay terminal 5 - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE IG2 FUSE OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition Engine room relay block IG2 relay terminal 2 - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
10. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the 1A connector from the instrument panel junction block. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1A-1 - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE ALT FUSE OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND) Disconnect the 1F connector from the instrument panel junction block. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition 1F-10 - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

Power switch conditions (power source mode) or system malfunctions can be checked by the status of the power switch indicator light.

Power switch indicator light condition

POWER SWITCH INDICATOR LIGHT CONDITION CHART

Scheme 175

Scheme 176

Scheme 177

1. INSPECT POWER SWITCH Remove the power switch (See «POWER SWITCH»(ref-305556-S09822652262008112800000) ). 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 power switch indicator will not illuminate. If the voltage is too low, the indicator will not illuminate. OK MEASUREMENT CONDITION SPECIFIED CONDITION REFERENCE CHART 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 POWER SWITCH (See «POWER SWITCH»(ref-305556-S09822652262008112800000) ) OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the D25 switch connector. Disconnect the D8 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART Tester Connection Condition Specified Condition D25-11 (SWIL) - D8-2S (SWIL) Always Below 1 ohms D25-12 (INDS) - D8-15 (INDS) Always Below 1 ohms D25-13 (INDW) - D8-14 (INDW) Always Below 1 ohms D25-S (GND) - Body ground Always Below 1 ohms D25-4 (COM) - Body ground Always Below 1 ohms D25-11 (SWIL) or D8-25 (SWIL) - Body ground Always 10 kohms or higher D25-12 (INDS) or D8-15 (INDS) - Body ground Always 10 kohms or higher D25-13 (INDW) or D8-14 (INDW) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

1. HYBRID CONTROL SYSTEM FUNCTION If the power switch is pressed with the shift lever is in the P or N position and the brake pedal depressed, the main body ECU (instrument panel junction block) determines that it is a hybrid control system start request. The certification ECU (smart key ECU assembly) and other ECUs perform key verification via the LIN communication line. The main body ECU (instrument panel junction block) activates the ACC relay. The main body ECU (instrument panel junction block) activates the IG1 and IG2 relays. The certification ECU (smart key ECU assembly) outputs a steering UNLOCK signal. The signal is sent to the main body ECU (instrument panel junction block) via the steering lock ECU. The main body ECU (instrument panel junction block) sends an on (READY) request signal to the hybrid vehicle control ECU. The hybrid vehicle control ECU sends an ACC cut request signal to the main body ECU (instrument panel junction block). SYMBOL OF MAIN BODY ECU REFERENCE CHART Symbol of main body ECU Signal STP Stop light switch ON signal Input SSW1/SSW2 Power switch ON signal Input ACCD ACC relay operation signal Output SLP Steering lock actuator position signal Input IG1D IG1 relay operation signal Output IG2D IG2 relay operation signal Output RDY Hybrid control system on (READY) detection signal Input STSW Hybrid control system on (READY) request signal Output

See also:
• REMOVAL
• DIAGNOSTIC TROUBLE CODE CHART
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• REMOVAL
• REMOVAL