Engine General Information and Diagnosis: 1A-216
C37-24
PPL/
YEL
Engine coolant
temp. (ECT)
sensor signal
3.3 – 3.8 V
Ignition switch turned ON,
ECT at 0
°
C, 32
°
F.
—
1.38 – 1.72 V
Ignition switch turned ON,
ECT at 50
°
C, 122
°
F.
0.40 – 0.53 V
Ignition switch turned ON,
ECT at 100
°
C, 212
°
F.
C37-25 LT GRN
Intake air temp.
(IAT) sensor signal
3.18 – 3.67 V
Ignition switch turned ON,
IAT at 0
°
C, 32
°
F.
—
1.32 – 1.65 V
Ignition switch turned ON,
IAT at 40
°
C, 104
°
F.
0.46 – 0.60 V
Ignition switch turned ON,
IAT at 80
°
C, 176
°
F.
C37-26
RED
Mass air flow
(MAF) sensor
signal
0.5 – 1.0 V
Ignition switch turned ON
with engine at stop.
—
1.3 – 1.8 V
(“Reference
waveform No.17: ”)
When engine running at
specified idle speed after
warmed up.
C37-27
BLU
Ground for MAF
sensor
Below 0.3 V
Ignition switch turned ON.
—
C37-28
BRN/
BLK
Generator control
signal output
*0 – 0.6 V
↑↓
5 – 7 V
(“Reference
waveform No.5: ” and
“Reference waveform
No.6: ”)
Engine running at idle
speed, headlight switch
turned ON.
Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.
C37-29
BLK/
YEL
Ground for ECM
Below 0.3 V
Ignition switch turned ON.
—
C37-30
BLK/
ORN
Ground for ECM
Below 0.3 V
Ignition switch turned ON.
—
C37-31
BLK/
YEL
Ground for A/F
sensor heater
Below 0.3 V
Ignition switch turned ON.
—
C37-32
PNK/
BLU
Heater output of A/
F sensor
10 – 14 V
Ignition switch turned ON.
—
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.18: ”)
Engine running at idle
after warmed up engine.
Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.
C37-33
GRY/
RED
Intake manifold
tuning vacuum
solenoid valve
output (for J20
engine)
10 – 14 V
Ignition switch turned ON.
—
0 – 1 V
(“Reference
waveform No.19: ”)
Engine running at idle
after warmed up engine.
C37-34
RED/
BLU
Ground for A/F
sensor adjusting
resistor
Below 0.3 V
Ignition switch turned ON.
—
C37-35
RED/
YEL
A/F sensor
adjusting resistor
signal
0.15 – 4.82 V
Ignition switch turned ON.
—
C37-36
PNK
Crankshaft position
(CKP) sensor (–)
(for J20 engine)
0 – 1 V
Ignition switch turned ON.
—
*4 – 6 V
↑↓
–4 – –6 V
(“Reference
waveform No.20: ”
and “Reference
waveform No.21: ”)
Engine running at idle
after warmed up engine.
Output signal is sinusoidal
waveform.
Waveform frequency
varies depending on
engine speed. (30 (36 – 6)
pulses are generated par
1 crankshaft revolution.)
Terminal
No.
Wire
color
Circuit
Normal voltage
Condition
Remarks
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