Terminals Of Ecu [08/2015 - ]

CHECK COMBINATION METER ASSEMBLY

Disconnect the I18 combination meter assembly connector.

Fig 1: Combination Meter Assembly Connector Terminal Identification
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I18-7 (ES)*1 - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
I18-20 (ES)*2 - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I18-1 (B) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
I18-13 (IG+) - Body ground	L - Body ground	Ignition power supply (IG signal)	Ignition switch off	Below 1 V
I18-13 (IG+) - Body ground	L - Body ground	Ignition power supply (IG signal)	Ignition switch ON	11 to 14 V

If the result is not as specified, the combination meter assembly may have a malfunction.

CHECK AIRBAG SENSOR ASSEMBLY

Fig 2: Airbag Sensor Assembly Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Terminal No.	Terminal Symbol	Destination
N5-10	LBE+	Front seat inner belt assembly LH
N5-18	LBE-	Front seat inner belt assembly LH
O7-16	FSR+	Occupant detection ECU
O7-24	FSR-	Occupant detection ECU

CHECK OCCUPANT DETECTION ECU

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

Fig 3: Occupant Detection ECU Connector Terminal Identification

TEXT IN ILLUSTRATION

for TMMK Made

for SIA Made

Tester Connection	Wiring Color	Terminal Description	Condition	Specification
d11-1 (+B) - d11-3 (GND)	W1 - W-B R2 - W-B	Battery	Always	11 to 14 V
d11-2 (DIA) - d11-3 (GND)	GR - W-B	Diagnosis (DLC3)	Ignition switch ON, Techstream not connected to DLC3	Below 1 V
d11-3 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
d11-4 (FSR-) - d11-3 (GND)	Y - W-B1 B - W-B2	Airbag sensor assembly communication line	Always	Below 1 V
d11-5 (BGND) - d11-3 (GND)	P - W-B	Front passenger buckle switch ground line	Always	Below 1 V
d11-6 (IG2) - d11-3 (GND)	B1 - W-B SB2 - W-B	Power source	Ignition switch ON	11 to 14 V
d11-7 (FSR+) - d11-4 (FSR-)	L - Y1 W - B2	Airbag sensor assembly communication line	Ignition switch ON	Pulse generation
d11-8 (BSW) - d11-5 (BGND)	G - P	Front passenger buckle switch line	Always	Pulse generation
d8-1 (SVC1) - d8-5 (SGD1)1 d18-1 (SVC1) - d18-5 (SGD1)2	R - G	Front occupant classification sensor power supply line	Ignition switch ON	4.9 to 5.1 V
d8-2 (SVC3) - d8-6 (SGD3)1 d18-2 (SVC3) - d18-6 (SGD3)2	GR - W	Rear occupant classification sensor power supply line	Ignition switch ON	4.9 to 5.1 V
d8-3 (SIG1) - d8-5 (SGD1)1 d18-3 (SIG1) - d18-5 (SGD1)2	P - G	Front occupant classification sensor signal line	Ignition switch ON	Pulse generation
d8-4 (SIG3) - d8-6 (SGD3)1 d18-4 (SIG3) - d18-6 (SGD3)2	Y - W1 SB - W2	Rear occupant classification sensor signal line	Ignition switch ON	Pulse generation

If the result is not as specified, the occupant detection ECU may have a malfunction.