Inspection — CPU terminal voltage list

Z-127spec table

Inspection

1
Remove the CPU from the joint box and measure the voltage from the joint box side.
2
If not as specified, inspect the parts listed under "Inspection area" and the related wiring harnesses.
3
If the parts and wiring harnesses are OK but system still does not work properly, replace the CPU.

Terminal voltage list

NOTE

B+: Battery positive voltage

CPU 16-pin connector — terminal voltage list

Terminal	Signal	Connection	Test condition	Voltage (V) / Continuity	Inspection area
A	Key insert	Key reminder switch	Ignition key inserted	B+	• ROOM 15 A fuse • Key reminder switch
A	Key insert	Key reminder switch	Ignition key removed	0	• ROOM 15 A fuse • Key reminder switch
B	Rear wiper	Rear wiper motor	Ignition switch at ON	B+	• REAR WIPER 15 A fuse • Rear wiper motor
C	TNS	TNS relay	Headlight switch on	B+	• TAIL 15 A fuse • TNS relay • Combination switch
C	TNS	TNS relay	Headlight switch off	0	• TAIL 15 A fuse • TNS relay • Combination switch
D	Seat belt warning	Buckle switch	Continuity inspection — Seat belt unfastened	Yes	Buckle switch
D	Seat belt warning	Buckle switch	Continuity inspection — Seat belt fastened	No	Buckle switch
E	—	—	—	—	—
F	Rear wiper	Rear wiper switch	Continuity inspection — Rear wiper switch on	Yes	Combination switch
F	Rear wiper	Rear wiper switch	Continuity inspection — Rear wiper switch off	No	Combination switch
G	Rear washer	Rear washer switch	Ignition switch at ON — Rear washer switch on	0	• METER 15 A fuse • Rear washer motor • Combination switch
G	Rear washer	Rear washer switch	Ignition switch at ON — Rear washer switch off	B+	• METER 15 A fuse • Rear washer motor • Combination switch
H	—	—	—	—	—
I	—	—	—	—	—
J	Seat belt warning	Seat belt warning light	Ignition switch at ON	B+	• METER 15 A fuse • Seat belt warning light
K	CPU ground	GND	Continuity inspection	Yes	—
L	Key illumination	Ignition key illumination	Constant	B+	• ROOM 15 A fuse • Ignition key illumination
M	—	—	—	—	—
N	Interior light	Interior light switch	Interior light switch at DOOR — Any door open	0	• ROOM 15 A fuse • Interior light • Door switch
N	Interior light	Interior light switch	Interior light switch at DOOR — All doors closed	B+	• ROOM 15 A fuse • Interior light • Door switch
O	+B	Battery	Constant	B+	ROOM 15 A fuse
P	IG 1	Ignition switch	Ignition switch at ON	B+	METER 15 A fuse

SignalKey insert

ConnectionKey reminder switch

Test conditionIgnition key inserted

Voltage (V) / ContinuityB+

Inspection area• ROOM 15 A fuse • Key reminder switch

SignalKey insert

ConnectionKey reminder switch

Test conditionIgnition key removed

Voltage (V) / Continuity0

Inspection area• ROOM 15 A fuse • Key reminder switch

SignalRear wiper

ConnectionRear wiper motor

Test conditionIgnition switch at ON

Voltage (V) / ContinuityB+

Inspection area• REAR WIPER 15 A fuse • Rear wiper motor

SignalTNS

ConnectionTNS relay

Test conditionHeadlight switch on

Voltage (V) / ContinuityB+

Inspection area• TAIL 15 A fuse • TNS relay • Combination switch

SignalTNS

ConnectionTNS relay

Test conditionHeadlight switch off

Voltage (V) / Continuity0

Inspection area• TAIL 15 A fuse • TNS relay • Combination switch

SignalSeat belt warning

ConnectionBuckle switch

Test conditionContinuity inspection — Seat belt unfastened

Voltage (V) / ContinuityYes

Inspection areaBuckle switch

SignalSeat belt warning

ConnectionBuckle switch

Test conditionContinuity inspection — Seat belt fastened

Voltage (V) / ContinuityNo

Inspection areaBuckle switch

Signal—

Connection—

Test condition—

Voltage (V) / Continuity—

Inspection area—

SignalRear wiper

ConnectionRear wiper switch

Test conditionContinuity inspection — Rear wiper switch on

Voltage (V) / ContinuityYes

Inspection areaCombination switch

SignalRear wiper

ConnectionRear wiper switch

Test conditionContinuity inspection — Rear wiper switch off

Voltage (V) / ContinuityNo

Inspection areaCombination switch

SignalRear washer

ConnectionRear washer switch

Test conditionIgnition switch at ON — Rear washer switch on

Voltage (V) / Continuity0

Inspection area• METER 15 A fuse • Rear washer motor • Combination switch

SignalRear washer

ConnectionRear washer switch

Test conditionIgnition switch at ON — Rear washer switch off

Voltage (V) / ContinuityB+

Inspection area• METER 15 A fuse • Rear washer motor • Combination switch

Signal—

Connection—

Test condition—

Voltage (V) / Continuity—

Inspection area—

Signal—

Connection—

Test condition—

Voltage (V) / Continuity—

Inspection area—

SignalSeat belt warning

ConnectionSeat belt warning light

Test conditionIgnition switch at ON

Voltage (V) / ContinuityB+

Inspection area• METER 15 A fuse • Seat belt warning light

SignalCPU ground

ConnectionGND

Test conditionContinuity inspection

Voltage (V) / ContinuityYes

Inspection area—

SignalKey illumination

ConnectionIgnition key illumination

Test conditionConstant

Voltage (V) / ContinuityB+

Inspection area• ROOM 15 A fuse • Ignition key illumination

Signal—

Connection—

Test condition—

Voltage (V) / Continuity—

Inspection area—

SignalInterior light

ConnectionInterior light switch

Test conditionInterior light switch at DOOR — Any door open

Voltage (V) / Continuity0

Inspection area• ROOM 15 A fuse • Interior light • Door switch

SignalInterior light

ConnectionInterior light switch

Test conditionInterior light switch at DOOR — All doors closed

Voltage (V) / ContinuityB+

Inspection area• ROOM 15 A fuse • Interior light • Door switch

Signal+B

ConnectionBattery

Test conditionConstant

Voltage (V) / ContinuityB+

Inspection areaROOM 15 A fuse

SignalIG 1

ConnectionIgnition switch

Test conditionIgnition switch at ON

Voltage (V) / ContinuityB+

Inspection areaMETER 15 A fuse

Support our work!

Inspection — CPU terminal voltage list

Inspection

Terminal voltage list

CPU 16-pin connector — terminal voltage list

Search Manual