Inspection Procedure

NOTE: When one of the DTCs shown in the illustration above is detected, troubleshoot the DTC(s) by following the troubleshooting procedure relevant to the DTC(s). If the power source mode still cannot be changed normally, despite troubleshooting, one of the following may have occurred:

The LIN communication line is malfunctioning.
The certification ECU has determined that no key is inside the cabin.
The engine switch is malfunctioning.
The main body ECU is malfunctioning.

HINT:

If the vehicle is in key cancel mode, change to normal mode (See CUSTOMIZE PARAMETERS ).

CHECK WHETHER DTC OUTPUT OCCURS
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
  HINT:
  
  When it is impossible to turn the engine switch on (IG), connect the Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.
3. Enter the following menus: Body Electrical / Main Body / Trouble Codes.
4. Clear the DTCs.
  HINT:
  
  After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG).
5. Check for DTCs again.
  OK:
  
  No DTC is output.
  
  NG: GO TO DIAGNOSTIC TROUBLE CODE CHART (See )
  
  OK: Go to next step

CHECK SMART KEY SYSTEM

Remove the battery of the electrical key transmitter (See TRANSMITTER BATTERY (W/ SMART KEY SYSTEM) ).
With the brake pedal depressed, touch the TOYOTA mark of the key to the engine switch.

When operating the engine switch, check whether the engine switch changes to on (ACC) or on (IG).

HINT:

When the electrical key transmitter cannot be verified even when it is in the operational area, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the engine switch.

When performing the check, if the engine switch turns on (ACC) or on (IG), there is a problem with key certification inside the cabin.

Fig 1: Identifying Engine Switch And Key

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT REFERENCE

Result	Proceed to
Does not change to on (ACC) or on (IG)	A
Changes to on (ACC) and on (IG)	B

B: GO TO SMART KEY SYSTEM (FOR ENTRY FUNCTION) (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) (See ROOM OSCILLATOR DOES NOT RECOGNIZE KEY )

A: Go to next step

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 SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
AM2-2 fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: Go to next step

READ VALUE USING TECHSTREAM (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

DATA LIST REFERENCE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
IG1 Relay Monitor (Inside)	IG1 inner relay monitor/ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-
IG2 Relay Monitor (Inside)	IG2 inner relay monitor/ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-
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 (IG), IG1 Relay Monitor (Inside) is ON and IG2 Relay Monitor (Inside) is ON.

When the engine switch is turned on (ACC), ACC Relay Monitor is ON.

NG: Go to step 5

OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

INSPECT IG1 RELAY

Inspect the 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 CHART

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage is applied to terminals 1 and 2	Below 1 Ω
3 - 5	Battery voltage is not applied to terminals 1 and 2	10 kΩ or higher

Fig 2: Identifying IG1 Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: Go to next step

INSPECT IG2 RELAY

Inspect the 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 SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage is applied to terminals 1 and 2	Below 1 Ω
3 - 5	Battery voltage is not applied to terminals 1 and 2	10 kΩ or higher

Fig 3: Inspecting Defogger Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: Go to next step

INSPECT ACC RELAY

Inspect the ACC relay.

Remove the ACC relay from the engine room No. 5 relay block.

Measure the resistance according to the value(s) in the table below.

Fig 4: Inspecting Defogger Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage is applied to terminals 1 and 2	Below 1 Ω
3 - 5	Battery voltage is not applied to terminals 1 and 2	10 kΩ or higher

NG: REPLACE RELAY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU)

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 SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Relay block IG2 relay terminal 1 - E16-5 (IG2D)	Always	Below 1 Ω
Relay block IG2 relay terminal 2 - Body ground	Always	Below 1 Ω
Relay block IG2 relay terminal 1 or E16-5 (IG2D) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 5: Identifying Terminals Of E16 Main Body ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU)

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 SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Relay block ACC relay terminal 1 -E15-4 (ACCD)	Always	Below 1 Ω
Relay block ACC relay terminal 2 - Body ground	Always	Below 1 Ω
Relay block ACC relay terminal 1 or E15-4 (ACCD) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 6: Identifying Terminals Of E15 Main Body ECU Connector

OK: Go to next step

INSPECT ENGINE SWITCH

Remove the engine switch (See ENGINE SWITCH ).

Measure the resistance of the switch.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
7 (SS1) - 5 (GND)	Pushed	Below 1 Ω
2 (SS2) - 5 (GND)	Pushed	Below 1 Ω
7 (SS1) - 5 (GND)	Not pushed	10 kΩ or higher
2 (SS2) - 5 (GND)	Not pushed	10 kΩ or higher

Fig 7: Identifying Terminals Of Engine Switch Connector

NG: REPLACE ENGINE SWITCH (See ENGINE SWITCH )

OK: Go to next step

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 SPECIFIED CONDITION CHART

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 SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
E16-4 (GND2) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 8: Identifying Terminals Of E15 And E16 Main Body ECU Connectors

OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)