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EC-1060
[YD (WITH EURO-OBD)]
POWER SUPPLY AND GROUND CIRCUIT
Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure BBS001WY
1. INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes >> GO TO 6.
No >> GO TO 2.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION
DATA
(DC Voltage and Pulse Signal)
1
2
3
B
B
B
ECM ground
[Engine is running]
● Warm-up condition
● Idle speed
Approximately 0V
35 B ECM ground
[Engine is running]
● Warm-up condition
● Idle speed
Approximately 0V
105 G ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
● For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
● More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
107
108
W/R
W/R
Ignition switch [Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
113 G ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
● For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
● More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
114 B ECM ground
[Engine is running]
● Warm-up condition
● Idle speed
Approximately 0V
119
120
Y
R
Power supply for ECM [Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
121 W/L
Power supply for ECM
(Back-up)
[Ignition switch OFF]
BATTERY VOLTAGE
(11 - 14V)
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