Infiniti G37 Coupe. Manual — part 778
POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.
HAC-101
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Component Function Check
INFOID:0000000001675734
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Press AUTO switch and A/C switch.
2.
Display should indicate AUTO. Confirm that the compressor clutch engages (sound or visual inspection).
(Discharge air and blower speed depend on ambient, in-vehicle and set temperatures.)
Does magnet clutch engaged?
YES
>> END.
NO
>> Go to Diagnosis Procedure. Refer to
HAC-101, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000001675735
1.
CHECK POWER SUPPLY CIRCUIT FOR UNIFIED METER AND A/C AMP.
1.
Disconnect unified meter and A/C amp. connector.
2.
Check voltage between unified meter and A/C amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUSE
Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)]. Refer to
PG-91, "Fuse, Connector and Ter-
.
Is the inspection result normal?
YES
>> Check harness for open circuit. Repair or replace if necessary.
NO
>> Check harness for short circuit and replace fuse.
3.
CHECK GROUND CIRCUIT FOR UNIFIED METER AND A/C AMP.
1.
Turn ignition switch OFF.
2.
Check continuity between unified meter and A/C amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK PRESET SWITCH
(BASE AUDIO WITHOUT NAVIGATION),
(BOSE AUDIO WITHOUT NAVIGATION) or
(BOSE AUDIO WITH
NAVIGATION).
Is the inspection result normal?
YES
>> Replace unified meter and A/C amp.
NO
>> Repair or replace malfunctioning part(s).
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M67
41
Ground
Approx. 0 V
Battery voltage
Battery voltage
53
Approx. 0 V
Approx. 0 V
Battery voltage
54
Battery voltage
Battery voltage
Battery voltage
Unified meter and A/C amp.
—
Continuity
Connector
Terminal
M67
55
Ground
Existed
71
HAC-102
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
ECM
ECU DIAGNOSIS
ECM
Reference Value
INFOID:0000000001910529
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• Specification data are reference values.
• Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. this IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sen-
sor and other ignition timing related sensors.
CONSULT-III MONITOR ITEM
Monitor Item
Condition
Values/Status
ENG SPEED
• Run engine and compare CONSULT-III value with the tachometer indication.
Almost the same speed as
the tachometer indication
MAS A/F SE-B1
See
MAS A/F SE-B2
See
B/FUEL SCHDL
See
A/F ALPHA-B1
See
A/F ALPHA-B2
See
COOLAN TEMP/S
• Ignition switch: ON
Indicates engine coolant
temperature
A/F SEN1 (B1)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
HO2S2 (B1)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 (B2)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→
RICH
HO2S2 MNTR (B2)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→
RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer indi-
cation.
Almost the same speed as
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.45 - 1.00V
Accelerator pedal: Fully depressed
4.4 - 4.8V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.45 - 1.00V
Accelerator pedal: Fully depressed
4.3 - 4.8V
ECM
HAC-103
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
TP SEN 1-B1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank tempera-
ture
INT/A TEMP SE
• Ignition switch: ON
Indicates intake air temper-
ature
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8V
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of
fuel tank
START SIGNAL
• Ignition switch: ON
→
START
→
ON
OFF
→
ON
→
OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
P/N POSI SW
• Ignition switch: ON
Selector lever: P or N (A/T), Neutral (M/T)
ON
Selector lever: Except above
OFF
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch: ON
and/or
Lighting switch: 2nd position
ON
Rear window defogger switch and lighting
switch: OFF
OFF
IGNITION SW
• Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan switch: ON
ON
Heater fan switch: OFF
OFF
BOOST VCUM SW
• Always a certain value is displayed.
• This items are not efficient for CV36 models.
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
INJ PULSE-B2
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
7
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
Monitor Item
Condition
Values/Status
HAC-104
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
ECM
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
5% - 35%
2,500 rpm
5% - 35%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g·m/s
2,500 rpm
7.0 - 20.0 g·m/s
PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)
0%
2,000 rpm
—
INT/V SOL (B1)
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
INT/V SOL (B2)
• Engine: After warming up
• Selector lever: P or N (A/T), Neu-
tral (M/T)
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
TP SEN 1-B2
• Ignition switch: ON
(Engine stopped)
• Selector lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
TP SEN 2-B2*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
FUEL PUMP RLY
• For 1 seconds after turning ignition switch: ON
• Engine running or cranking
ON
• Except above
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
HO2S2 HTR (B2)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as
the tachometer indication
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer indi-
cation.
Almost the same speed as
the speedometer indication
Monitor Item
Condition
Values/Status
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст