Inspection of Keyless Start Control Module and Its Circuits

Precautions: Precautions for Diagnosing Trouble · Precautions for Replacing Remote Controller · Precautions for Remote Controller Disposal · Precautions for Replacing Keyless Start Control Module · Precautions for Control Systems · General safety (00)

Voltage and Signal Check

Check voltage and/or pulse signal of keyless start control module (3) using voltmeter (1) and oscilloscope (2).

NOTE:

•Check that battery voltage is 12 V or more.
•Voltage of terminal with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with oscilloscope if necessary.

[A]:	Keyless start control module connector (View: [a])

“E484” connector

Terminal No.	Wire color	Circuit	Normal voltage	Condition
E484-1	BRN	Backup power supply	10 – 14 V	—
E484-2*	BLU	Hood latch switch signal (if equipped)	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
E484-2*	BLU	Hood latch switch signal (if equipped)	Approx. 0 V	Hood latch: Latch released
E484-3	RED	Horn relay	Approx. 0 V	Horn: Sounding
E484-3	RED	Horn relay	10 – 14 V	Other than above condition
E484-4*	GRN	CPP No.1 switch signal (M/T model)	Approx. 0 V	Clutch pedal: Depressed
		CPP No.1 switch signal (M/T model)	Refer to CPP No.1 switch signal and power supply for starting motor control relay (M/T model).
		Transmission range sensor signal (A/T model)	Approx. 0 V	Ignition: “ON” Select lever: P or N range
		Transmission range sensor signal (A/T model)	Refer to Transmission range sensor signal, power supply for starting motor control relay (A/T model) and P position switch signal.
E484-5	YEL	Outside warning buzzer	0 ←→ 14 V	Outside warning buzzer: Sounding
E484-6	LT GRN	Starting motor control relay signal	10 – 14 V	Engine: Cranking
E484-6	LT GRN	Starting motor control relay signal	Approx. 0 V	Other than above condition
E484-7	—	—	—	—
E484-8*	PNK	Power supply for starting motor control relay (M/T model)	10 – 14 V	Engine: Cranking
		Power supply for starting motor control relay (M/T model)	Refer to CPP No.1 switch signal and power supply for starting motor control relay (M/T model).
		Power supply for starting motor control relay (A/T model)	10 – 14 V	Engine: Cranking
		Power supply for starting motor control relay (A/T model)	Refer to Transmission range sensor signal, power supply for starting motor control relay (A/T model) and P position switch signal.
		Power supply for starting motor control relay (twin clutch system model)	10 – 14 V	Engine: Cranking
			Approx. 0 V	Other than above condition

“G16” connector

Terminal No.	Wire color	Circuit	Normal voltage	Condition
G16-1	BLU	Power supply for steering lock unit	10 – 14 V	—
G16-2	YEL	Steering lock unit	—	—
G16-3	—	—	—	—
G16-4	PNK	Push switch 1 signal	Approx. 0 V	Engine switch: Pushed
G16-4	PNK	Push switch 1 signal	10 – 14 V	Other than above condition
G16-5	BRN	Steering lock unit	—	—
G16-6	YEL	Engine switch	—	—
G16-7	GRN	Engine switch	—	—
G16-8	—	—	—	—
G16-9*	RED	CAN communication line (high)	Refer to CAN communication signal.
G16-10	LT GRN	Steering lock unit	—	—
G16-11	GRN	Steering lock unit	—	—
G16-12	—	—	—	—
G16-13	BLK	Engine switch	—	—
G16-14	GRY	Ground for keyless start control module	Approx. 0 V	—
G16-15	RED	Push switch 2 signal	Approx. 0 V	Engine switch: Pushed
G16-15	RED	Push switch 2 signal	10 – 14 V	Other than above condition
G16-16	LT GRN	Theft deterrent light signal	0 ←→ 14 V	Theft deterrent light: Blinking
G16-16	LT GRN	Theft deterrent light signal	10 – 14 V	Other than above condition
G16-17	GRY	Engine switch	—	—
G16-18	BLU	Engine switch illumination signal	Approx. 0 V	Engine switch illumination: Lit
G16-18	BLU	Engine switch illumination signal	10 – 14 V	Engine switch illumination: Not lit
G16-19*	WHT	CAN communication line (low)	Refer to CAN communication signal.
G16-20	—	—	—	—

“L21” connector

Terminal No.	Wire color	Circuit	Normal voltage	Condition
L21-1*	BLK	Mid inside antenna (+) signal	Refer to Mid inside antenna signal.
L21-2*	LT GRN	Rear inside antenna (+) signal	Refer to Rear inside antenna signal.
L21-3*	WHT	Rear outside antenna (+) signal	Refer to Rear outside antenna signal.
L21-4*	GRN	Driver side outside antenna (+) signal	Refer to Driver side outside antenna signal and passenger side outside antenna signal.
L21-5*	BRN	Passenger side outside antenna (+) signal	Refer to Driver side outside antenna signal and passenger side outside antenna signal.
L21-6*	PPL	Vehicle speed signal	Refer to Vehicle speed signal.
L21-7	GRN	Power supply for IG1 relay	10 – 14 V	Ignition: “ON”
L21-7	GRN	Power supply for IG1 relay	Approx. 0 V	Other than above condition
L21-8	BRN	Power supply for IG2 relay	10 – 14 V	Ignition: “ON”
L21-8	BRN	Power supply for IG2 relay	Approx. 0 V	Other than above condition
L21-9*	BEG	Driver door lock switch signal	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-9*	BEG	Driver door lock switch signal	Approx. 0 V	Driver door lock switch: Unlocked
L21-10	RED	Passenger door request switch signal	Approx. 0 V	Passenger door request switch: Pushed
L21-10	RED	Passenger door request switch signal	10 – 14 V	Other than above condition
L21-11	PPL	Driver door request switch signal	Approx. 0 V	Driver door request switch: Pushed
L21-11	PPL	Driver door request switch signal	10 – 14 V	Other than above condition
L21-12	—	—	—	—
L21-13*	BRN	Door key cylinder switch signal (Unlock)	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-13*	BRN	Door key cylinder switch signal (Unlock)	Approx. 0 V	Door key cylinder switch: Unlocked
L21-14*	GRN	Rear end door switch signal	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-14*	GRN	Rear end door switch signal	Approx. 0 V	Rear end door: Opened
L21-15*	BLU	Rear door switch signal (R)	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-15*	BLU	Rear door switch signal (R)	Approx. 0 V	Rear door (R): Opened
L21-16*	PNK	Driver door switch signal	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-16*	PNK	Driver door switch signal	Approx. 0 V	Driver door: Opened
L21-17	—	—	—	—
L21-18*	BLU	Door key cylinder switch signal (Lock)	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-18*	BLU	Door key cylinder switch signal (Lock)	Approx. 0 V	Door key cylinder switch: Locked
L21-19	LT BLU	ACC relay signal	10 – 14 V	Ignition: “ACC” or “ON”
L21-19	LT BLU	ACC relay signal	Approx. 0 V	Other than above condition
L21-20	RED	Backup power supply	10 – 14 V	—
L21-21*	GRN	Mid inside antenna (–) signal	Refer to Mid inside antenna signal.
L21-22*	RED	Rear inside antenna (–) signal	Refer to Rear inside antenna signal.
L21-23*	BLU	Rear outside antenna (–) signal	Refer to Rear outside antenna signal.
L21-24*	BEG	Driver side outside antenna (–) signal	Refer to Driver side outside antenna signal and passenger side outside antenna signal.
L21-25*	LT GRN	Passenger side outside antenna (–) signal	Refer to Driver side outside antenna signal and passenger side outside antenna signal.
L21-26	—	—	—	—
L21-27	GRY	Power supply for ACC relay	10 – 14 V	Ignition: “ACC” or “ON”
L21-27	GRY	Power supply for ACC relay	Approx. 0 V	Other than above condition
L21-28	—	—	—	—
L21-29*	LT BLU	Passenger door lock switch signal	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-29*	LT BLU	Passenger door lock switch signal	Approx. 0 V	Passenger door lock switch: Unlocked
L21-30	YEL	Rear end door request switch signal	Approx. 0 V	Rear end door request switch: Pushed
L21-30	YEL	Rear end door request switch signal	10 – 14 V	Other than above condition
L21-31	—	—	—	—
L21-32	—	—	—	—
L21-33*	PPL	CPP No.2 switch signal (M/T model)	Approx. 0 V	Ignition: “ON” Clutch pedal: Depressed
		CPP No.2 switch signal (M/T model)	10 – 14 V	Ignition: “ON” Clutch pedal: Released
		P position switch signal (A/T model / twin clutch system model)	Approx. 0 V	Ignition: “ON” Select lever: P range
			Refer to Transmission range sensor signal, power supply for starting motor control relay (A/T model) and P position switch signal.
L21-34*	WHT	Rear door switch signal (L)	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-34*	WHT	Rear door switch signal (L)	Approx. 0 V	Rear door (L): Opened
L21-35*	RED	Passenger door switch signal	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-35*	RED	Passenger door switch signal	Approx. 0 V	Passenger door: Opened
L21-36	BLK	Ground for keyless start control module	Approx. 0 V	—
L21-37*	LT GRN	Rear end door opener switch	Refer to Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal.
L21-37*	LT GRN	Rear end door opener switch	Approx. 0 V	Rear end opener switch: Pushed
L21-38	GRY	Brake light switch signal	Approx. 0 V	Brake pedal: Released
L21-38	GRY	Brake light switch signal	10 – 14 V	Brake pedal: Depressed
L21-39	GRN	IG1 relay signal	10 – 14 V	Ignition: “ON”
L21-39	GRN	IG1 relay signal	Approx. 0 V	Other than above condition
L21-40	BLU	IG2 relay signal	10 – 14 V	Ignition: “ON”
L21-40	BLU	IG2 relay signal	Approx. 0 V	Other than above condition

Reference Waveform

Oscilloscope display

Shown below is typical waveform display provided by oscilloscope.

NOTE:

•How to read waveforms is shown below.

[a]:	Waveform of channel 1	[c]:	VOLT/DIV of each channel
[b]:	Ground level of each channel	[d]:	TIME/DIV

•Waveform varies depending on measurement condition and vehicle spec.

Hood latch switch signal, door lock switch signal, door key cylinder switch signal, rear end door switch signal, door switch signal and rear end door opener switch signal

Hood latch switch signal

Channel	Probe	Terminal No.
1	+	E484-2
1	–	G16-14

Measurement condition

•Hood latch: Fully latched

Driver door lock switch signal

Channel	Probe	Terminal No.
1	+	L21-9
1	–	G16-14

Measurement condition

•Driver door lock switch: Locked

Door key cylinder switch (Unlock) signal

Channel	Probe	Terminal No.
1	+	L21-13
1	–	G16-14

Measurement condition

•Door key cylinder switch (Unlock): OFF

Rear end door switch signal

Channel	Probe	Terminal No.
1	+	L21-14
1	–	G16-14

Measurement condition

•Rear end door: Closed

Rear door switch signal (R)

Channel	Probe	Terminal No.
1	+	L21-15
1	–	G16-14

Measurement condition

•Rear door (R): Closed

Driver door switch signal

Channel	Probe	Terminal No.
1	+	L21-16
1	–	G16-14

Measurement condition

•Driver door: Closed

Door key cylinder switch (Lock) signal

Channel	Probe	Terminal No.
1	+	L21-18
1	–	G16-14

Measurement condition

•Door key cylinder switch (Lock): OFF

Passenger door lock switch signal

Channel	Probe	Terminal No.
1	+	L21-29
1	–	G16-14

Measurement condition

•Passenger door lock switch: Locked

Rear door switch signal (L)

Channel	Probe	Terminal No.
1	+	L21-34
1	–	G16-14

Measurement condition

•Rear door (L): Closed

Passenger door switch signal

Channel	Probe	Terminal No.
1	+	L21-35
1	–	G16-14

Measurement condition

•Passenger door: Closed

Rear end door opener switch signal

Channel	Probe	Terminal No.
1	+	L21-37
1	–	G16-14

Measurement condition

•Rear end door opener switch: Released

CPP No.1 switch signal and power supply for starting motor control relay (M/T model)

CPP No.1 switch signal

Channel	Probe	Terminal No.
1	+	E484-4
1	–	G16-14

Measurement condition

•Ignition: “OFF”
•Clutch pedal: Released

Power supply for starting motor control relay (M/T model)

Channel	Probe	Terminal No.
1	+	E484-8
1	–	G16-14

Measurement condition

•Ignition: “OFF”

Transmission range sensor signal, power supply for starting motor control relay (A/T model) and P position switch signal

Transmission range sensor signal

Channel	Probe	Terminal No.
1	+	E484-4
1	–	G16-14

Measurement condition

•Ignition: “ON”
•Select lever: Other than P or N range

Power supply for starting motor control relay (A/T model)

Channel	Probe	Terminal No.
1	+	E484-8
1	–	G16-14

Measurement condition

•Ignition: “OFF”

P position switch signal

Channel	Probe	Terminal No.
1	+	L21-33
1	–	G16-14

Measurement condition

•Ignition: “ON”
•Select lever: Other than P range

CAN communication signal

CAN communication signal (High) (1)

Channel	Probe	Terminal No.
1	+	G16-9
1	–	G16-14

CAN communication signal (Low) (2)

Channel	Probe	Terminal No.
2	+	G16-19
2	–	G16-14

Measurement condition

•Ignition: “ON”

Mid inside antenna signal

Mid inside antenna (+) signal (1)

Channel	Probe	Terminal No.
1	+	L21-1
1	–	G16-14

Mid inside antenna (–) signal (2)

Channel	Probe	Terminal No.
2	+	L21-21
2	–	G16-14

Measurement condition

•Ignition: “OFF”
•All door: Closed
•Remote controller: Within driver side outside antenna detection range
•Driver door request switch: ON

Unlock

Lock

Rear inside antenna signal

Rear inside antenna (+) signal (1)

Channel	Probe	Terminal No.
1	+	L21-2
1	–	G16-14

Rear inside antenna (–) signal (2)

Channel	Probe	Terminal No.
2	+	L21-22
2	–	G16-14

Measurement condition

•Ignition: “OFF”
•All door: Closed
•Remote controller: Within driver side outside antenna detection range
•Driver door request switch: ON

Unlock

Lock

Rear outside antenna signal

Rear outside antenna (+) signal (1)

Channel	Probe	Terminal No.
1	+	L21-3
1	–	G16-14

Rear outside antenna (–) signal (2)

Channel	Probe	Terminal No.
2	+	L21-23
2	–	G16-14

Measurement condition

•Ignition: “OFF”
•All door: Closed
•Remote controller: Within rear outside antenna detection range
•Rear end door request switch: ON

Driver side outside antenna signal and passenger side outside antenna signal

Driver side outside antenna (+) signal (1)

Channel	Probe	Terminal No.
1	+	L21-4
1	–	G16-14

Driver side outside antenna (–) signal (2)

Channel	Probe	Terminal No.
2	+	L21-24
2	–	G16-14

Measurement condition

•Ignition: “OFF”
•All door: Closed
•Remote controller: Within driver side outside antenna detection range
•Driver door request switch: ON

Passenger side outside antenna (+) signal (1)

Channel	Probe	Terminal No.
1	+	L21-5
1	–	G16-14

Passenger side outside antenna (–) signal (2)

Channel	Probe	Terminal No.
2	+	L21-25
2	–	G16-14

Measurement condition

•Ignition: “OFF”
•All door: Closed
•Remote controller: Within passenger side outside antenna detection range
•Passenger door request switch: ON

Unlock

Lock

Vehicle speed signal

Channel	Probe	Terminal No.
1	+	L21-6
1	–	G16-14

Measurement condition

•Vehicle speed: 40 km/h (25 mile/h)