Smart Key System (Keyless Start) (2AR-FE) (Diagnostic Codes & Circuit Tests): Overview Toyota RAV4 IV

DESCRIPTION

This DTC is stored when the IG output circuits inside the main body ECU are open or shorted.

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1. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs. Start the engine. Allow the engine to idle for 1 minute or more. Enter the following menus: Body Electrical / Main Body / Trouble Codes. Read the DTCs. Result Display (DTC output) Proceed to B2271 A No DTC output B B --> See step 4 A: Go to next step
2. INSPECT FUSE (AM2-2) Remove the AM2-2 fuse from the engine room No. 1 relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition AM2-2 fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) Disconnect the E15 and E16 main body ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E16-1 (AM1) - Body ground Always 11 to 14 V E15-6 (AM2) - Body ground Always 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition E16-4 (GND2) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
4. USE SIMULATION METHOD TO CHECK (SYSTEM IS OK). Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)

This DTC is stored when a malfunction occurs in the IG output circuit, which is between the IG1 relay actuation circuit inside the main body ECU and the IG1 relay.

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1. READ VALUE USING TECHSTREAM (IG1 RELAY MONITOR (INSIDE)) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnosis Note IG1 Relay Monitor(Inside) IG1 inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK When the engine switch is turned on (IG), ON is displayed on the Techstream. NG --> See step 3 OK: Go to next step
2. CHECK SWITCH CONDITION (ENGINE SWITCH) Make sure that the electrical key is inside the cabin. With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed. OK off --> on (ACC) --> on (IG) --> off NG --> See step 5 OK --> See step 4
3. 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 Condition Specified Condition 3 - 5 Battery voltage is applied to terminals 1 and 2 Below 1 ohms 3 - 5 Battery voltage is not applied to terminals 1 and 2 10 kohms or higher NG --> REPLACE IG1 RELAY OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
4. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)
5. GO TO POWER SOURCE MODE DOES NOT CHANGE. Refer to «Power Source Mode does not Change»(ref-493438-S06476857312012081000000)

This DTC is stored when a malfunction occurs in the IG output circuit, which is between the IG2 relay actuation circuit inside the main body ECU and the IG2 relay.

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1. READ VALUE USING TECHSTREAM (IG2 RELAY MONITOR (INSIDE)) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG2 Relay Monitor(Inside) IG2 inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK When the engine switch is turned on (IG), ON is displayed on the Techstream. NG --> See step 3 OK: Go to next step
2. CHECK SWITCH CONDITION (ENGINE SWITCH) Make sure that the electrical key is inside the cabin. With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed. OK off --> on (ACC) --> on (IG) --> off NG --> See step 6 OK --> See step 5
3. INSPECT IG2 RELAY Remove the IG2 relay from the engine room No. 1 relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Battery voltage is applied to terminals 1 and 2 Below 1 ohms 3 - 5 Battery voltage is not applied to terminals 1 and 2 10 kohms or higher NG --> REPLACE IG2 RELAY OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU AND BODY GROUND) Remove the IG2 relay from the engine room No. 1 relay block. Disconnect the E16 main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Relay block IG2 relay terminal 1 - E16-5 (IG2D) Always Below 1 ohms Relay block IG2 relay terminal 2 - Body ground Always Below 1 ohms Relay block IG2 relay terminal 1 or E16-5 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
5. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)
6. GO TO POWER SOURCE MODE DOES NOT CHANGE. Refer to «Power Source Mode does not Change»(ref-493438-S06476857312012081000000)

This DTC is stored when a malfunction occurs in the ACC output circuit, which is between the ACC relay actuation circuit inside the main body ECU and the ACC relay.

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1. READ VALUE USING TECHSTREAM (ACC RELAY MONITOR) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note ACC Relay Monitor ACC relay monitor/ON or OFF ON: Engine switch on (ACC) OFF: Engine switch off - OK When the engine switch is turned on (ACC), ON is displayed on the Techstream. NG --> See step 4 OK: Go to next step
2. CHECK SWITCH CONDITION (ENGINE SWITCH) Make sure that the electrical key is inside the cabin. With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed. OK off --> on (ACC) --> on (IG) --> off NG --> See step 6 OK --> See step 3
3. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)
4. INSPECT ACC RELAY Remove the ACC relay from the No. 5 relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Battery voltage is applied to terminals 1 and 2 Below 1 ohms 3 - 5 Battery voltage is not applied to terminals 1 and 2 10 kohms or higher NG --> REPLACE ACC RELAY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU AND BODY GROUND) Remove the ACC relay from the No. 5 relay block. Disconnect the E15 main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Relay block ACC relay terminal 1 - E15-4 (ACCD) Always Below 1 ohms Relay block ACC relay terminal 2 - Body ground Always Below 1 ohms Relay block ACC relay terminal 1 or E15-4 (ACCD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
6. GO TO POWER SOURCE MODE DOES NOT CHANGE. Refer to «Power Source Mode does not Change»(ref-493438-S06476857312012081000000)

This DTC is stored when the engine start request signal circuit inside the main body ECU is open or shorted.

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1. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble Codes. Clear the DTCs. Depress the brake pedal with the engine switch on (IG), wait at least 15 seconds, and check whether DTC B2275 recurs. RESULT Display (DTC output) Proceed to B2275 A No DTC output B B --> See step 6 A: Go to next step
2. CHECK MAIN BODY ECU (STSW VOLTAGE) Disconnect the E17 main body ECU connector. With the shift lever in P or N, depress the brake pedal fully. Measure the voltage according to the value(s) in the table below. HINT: The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks. Standard Voltage Tester Connection Condition Specified Condition E17-4 (STSW) - Body ground Brake pedal depressed with shift lever in P or N and engine switch pushed once 11 to 14 V NG --> See step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM) Disconnect the E17 main body ECU connector. Disconnect the A9 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E17-4 (STSW) - A9-52 (STSW) Always Below 1 ohms E17-4 (STSW) or A9-52 (STSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK WHETHER ENGINE STARTS Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one. Check that the engine starts normally. OK Engine starts normally. NG --> See step 5 OK --> END (MAIN BODY ECU IS DEFECTIVE)
5. GO TO SFI SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493432-S10257292002012081000000)
6. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)

This DTC is stored when a malfunction is detected in the ACCR signal output by the main body ECU.

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1. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble Codes. Clear the DTCs. Check whether DTC B2276 recurs 50 seconds or more after the engine switch is turned on (IG). RESULT Display (DTC output) Proceed to B2276 A No DTC output B B --> See step 5 A: Go to next step
2. CHECK MAIN BODY ECU (ACCR VOLTAGE) Disconnect the E17 main body ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E17-11 (ACCR) - Body ground Engine switch pressed and engine cranking 11 to 14 V NG --> See step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM) Disconnect the E17 main body ECU connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E17-11 (ACCR) - B30-2 (ACCR) Always Below 1 ohms E17-11 (ACCR) or B30-2 (ACCR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK MAIN BODY ECU Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one. Check whether DTC B2276 recurs by repeating the "CHECK WHETHER DTC OUTPUT RECURS" procedures above. OK No DTC is output. NG --> See step 6 OK --> END (MAIN BODY ECU IS DEFECTIVE)
5. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)
6. GO TO SFI SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493432-S10257292002012081000000)

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

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

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1. READ VALUE USING TECHSTREAM (START SWITCH 1 AND 2) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the value displayed on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Start Switch 1/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Start Switch2 Start Switch 2/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK When the engine switch is turned on (IG), ON appears on the Techstream screen. NG --> See step 4 OK: Go to next step
2. CHECK SWITCH CONDITION (ENGINE SWITCH) Make sure that the electrical key is inside the cabin. With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed. OK off --> on (ACC) --> on (IG) --> off NG --> See step 6 OK --> See step 3
3. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000)
4. INSPECT ENGINE SWITCH Remove the engine switch.Refer to «REMOVAL»(ref-493437-S14958663362012081000000). Measure the resistance according to the value(s) in the table below. 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 --> See step 7 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the E78 engine switch connector. Disconnect the E16 main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E78-7 (SS1) - E16-10 (SSW1) Always Below 1 ohms E78-2 (SS2) - E16-9 (SSW2) Always Below 1 ohms E78-5 (GND) - Body ground Always Below 1 ohms E78-7 (SS1) or E16-10 (SSW1) - Body ground Always 10 kohms or higher E78-2 (SS2) or E16-9 (SSW2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
6. GO TO POWER SOURCE MODE DOES NOT CHANGE. Refer to «Power Source Mode does not Change»(ref-493438-S06476857312012081000000)
7. REPLACE ENGINE SWITCH. Refer to «REMOVAL»(ref-493437-S14958663362012081000000)

DTC B2281 is stored when the circuit between the main body ECU and shift lock control ECU is abnormal.

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1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU) Disconnect the E15 main body ECU connector. Disconnect the E39 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E15-15 (P) - E39-7 (P2) Always Below 1 ohms E15-15 (P) or E39-7 (P2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK SHIFT LOCK CONTROL ECU Temporarily replace the shift lock control ECU with a new or normally functioning one. Check that the engine starts normally. OK Engine starts normally. NG --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK --> END (SHIFT LOCK CONTROL ECU IS DEFECTIVE)

The main body ECU and combination meter are connected with a cable and a CAN communication line. DTC B2282 is stored when signals, transmitted through the cable and the communication line, do not match.

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

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1. READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Vehicle Speed Signal Vehicle speed signal/Stop or Run Stop: Vehicle stopped Run: Vehicle being driven - OK When the vehicle is stopped, Stop appears on the Techstream screen. NG --> See step 2 OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COMBINATION METER) Disconnect the IC instrument panel junction block connector. Disconnect the E19 combination meter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition IC-8 (SPD) - E19-39 (+S) Always Below 1 ohms IC-8 (SPD) or E19-39 (+S) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WHETHER ENGINE STARTS Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one. Check that the engine starts normally. OK Engine starts normally. NG --> See step 4 OK --> END (MAIN BODY ECU IS DEFECTIVE)
4. GO TO METER / GAUGE SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493475-S22649170462012081000000)

The main body ECU and steering lock ECU are connected by a cable and a LIN communication line. These DTCs are stored when: 1) signals, transmitted through the cable and the communication line, do not match; or 2) a malfunction is detected in the circuit between the main body ECU and steering lock ECU.

The steering lock ECU unlocks the steering wheel only when it receives an unlock signal from LIN communication and the cable.

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1. READ VALUE USING TECHSTREAM (STEERING LOCK CONDITION) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Steering Unlock Switch Steering lock condition/ON or OFF ON: Steering unlocked OFF: Steering locked - OK When the steering wheel is unlocked, ON appears on the Techstream screen. NG --> See step 2 OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STEERING LOCK ECU) Disconnect the E15 main body ECU connector. Disconnect the E77 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E15-18 (SLP) - E77-4 (SLP1) Always Below 1 ohms E15-18 (SLP) or E77-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WHETHER ENGINE STARTS Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one. Check that the engine starts normally. OK Engine starts normally. NG --> See step 4 OK --> END (MAIN BODY ECU IS DEFECTIVE)
4. GO TO STEERING LOCK SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493498-S13295259062012081000000)

The main body ECU and ECM are connected by a cable and the CAN communication line. If the cable information and CAN information are inconsistent, this DTC is stored.

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1. READ VALUE USING TECHSTREAM (ENGINE CONDITION) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Condition Engine condition/Stop or Run Stop: Engine stopped Run: Engine running - OK When the engine is running, Run is displayed on the Techstream. NG --> See step 2 OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM) Disconnect the E17 main body ECU connector. Disconnect the A9 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E17-2 (TACH) - A9-26 (TACH) Always Below 1 ohms E17-2 (TACH) or A9-26 (TACH) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WHETHER ENGINE STARTS Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one. Check that the engine starts normally. OK Engine starts normally. NG --> See step 4 OK --> END (MAIN BODY ECU IS DEFECTIVE)
4. GO TO SFI SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-493432-S10257292002012081000000)

DTC B2287 is stored when the LIN communication circuit between the main body ECU and certification ECU is abnormal. DTC B2289 is stored when there is a malfunction in the immobiliser system.

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1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - CERTIFICATION ECU) Disconnect the ID instrument panel junction block connector. Disconnect the E84 certification ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ID-9 (LIN1) - E84-10 (LIN) Always Below 1 ohms ID-9 (LIN1) or E84-10 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK CERTIFICATION ECU Temporarily replace the ECU aggregation box (certification ECU) with a new one.Refer to «REMOVAL»(/toyota/rav4/iv-2012-2015/remont/door-locks-anti-theft-systems/#certification-ecu-wsmart-key-system-service-information). NOTE: When replacing the certification ECU, registration procedures must be performed according to the "Registration" section.Refer to «REGISTRATION»(ref-493456-S17392561222012081000000). Check for DTCs again. OK No DTC is output. NG --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OK --> END (CERTIFICATION ECU IS DEFECTIVE)

When the certification ECU has detected the electrical key inside the cabin before the brake pedal is depressed, the power source mode can be changed in the following order sequentially by pressing the engine switch: off --> on (ACC) --> on (IG) --> off.

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

ENGINE SWITCH INDICATOR LIGHT CONDITION

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1. INSPECT ENGINE SWITCH Remove the engine switch.Refer to «REMOVAL»(ref-493437-S14958663362012081000000). Apply battery voltage to the switch and check the illumination condition of the engine switch indicator light. NOTE: If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator light does not illuminate. If the voltage is too low, the indicator light does not illuminate. OK Measurement Condition Condition Specified Condition Battery terminal (+) --> Terminal 11 (SWIL) Battery terminal (-) --> Terminal 4 (COM) or 5 (GND) Battery voltage is applied to the terminals Illuminates Battery terminal (+) --> Terminal 12 (INDS) Battery terminal (-) --> Terminal 4 (COM) or 5 (GND) Battery voltage is applied to the terminals Illuminates (green) Battery terminal (+) --> Terminal 13 (INDW) Battery terminal (-) --> Terminal 4 (COM) or 5 (GND) Battery voltage is applied to the terminals Illuminates (amber) NG --> See step 3 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the E78 engine switch connector. Disconnect the E16 and E17 main body ECU connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E78-11 (SWIL) - E16-8 (SWIL) Always Below 1 ohms E78-12 (INDS) - E17-1 (INDS) Always Below 1 ohms E78-13 (INDW) - E17-8 (INDW) Always Below 1 ohms E78-5 (GND) - Body ground Always Below 1 ohms E78-4 (COM) - Body ground Always Below 1 ohms E78-11 (SWIL) or E16-8 (SWIL) - Body ground Always 10 kohms or higher E78-12 (INDS) or E17-1 (INDS) - Body ground Always 10 kohms or higher E78-13 (INDW) or E17-8 (INDW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
3. REPLACE ENGINE SWITCH. Refer to «REMOVAL»(ref-493437-S14958663362012081000000)

See also:
• REMOVAL
• REPLACEMENT
• REMOVAL
• REMOVAL