Infiniti M45 (Y34). Manual — part 358
TROUBLE DIAGNOSIS
EC-121
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Generic Scan Tool (GST) Function
ABS002DV
DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
8 different functions explained below.
ISO9141 is used as the protocol.
The name GST or Generic Scan Tool is used in this service manual.
FUNCTION
PBIB0197E
SEF139P
Diagnostic test mode
Function
MODE 1
READINESS TESTS
This mode gains access to current emission-related data values, including analog inputs
and outputs, digital inputs and outputs, and system status information.
MODE 2
(FREEZE DATA)
This mode gains access to emission-related data value which were stored by ECM during
the freeze frame. For details, refer to
EC-54, "FREEZE FRAME DATA AND 1ST TRIP
MODE 3
DTCs
This mode gains access to emission-related power train trouble codes which were stored
by ECM.
EC-122
TROUBLE DIAGNOSIS
INSPECTION PROCEDURE
1.
Turn ignition switch OFF.
2.
Connect GST to data link connector, which is located under LH
dash panel near the fuse box cover.
3.
Turn ignition switch ON.
4.
Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)
MODE 4
CLEAR DIAG INFO
This mode can clear all emission-related diagnostic information. This includes:
●
Clear number of diagnostic trouble codes (MODE 1)
●
Clear diagnostic trouble codes (MODE 3)
●
Clear trouble code for freeze frame data (MODE 1)
●
Clear freeze frame data (MODE 2)
●
Reset status of system monitoring test (MODE 1)
●
Clear on board monitoring test results (MODE 6 and 7)
MODE 6
(ON BOARD TESTS)
This mode accesses the results of on board diagnostic monitoring tests of specific com-
ponents/systems that are not continuously monitored.
MODE 7
(ON BOARD TESTS)
This mode enables the off board test drive to obtain test results for emission-related pow-
ertrain components/systems that are continuously monitored during normal driving condi-
tions.
MODE 8
—
This mode can close EVAP system in ignition switch ON position (Engine stopped). When
this mode is performed, the following parts can be opened or closed.
●
EVAP canister vent control valve: closed
●
Vacuum cut valve bypass valve: open
In the following conditions, this mode cannot function.
●
Low ambient temperature
●
Low battery voltage
●
Engine running
●
Ignition switch OFF
●
Low fuel temperature
●
Too much pressure is applied to EVAP system
MODE 9
(CALIBRATION ID)
This mode enables the off-board test device to request specific vehicle information such
as Vehicle Identification Number (VIN) and Calibration IDs.
Diagnostic test mode
Function
PBIB0196E
SEF398S
TROUBLE DIAGNOSIS
EC-123
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5.
Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual of the
tool maker.
CONSULT-II Reference Value in Data Monitor Mode
ABS002DW
Remarks:
●
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 TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.
SEF416S
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
●
Run engine and compare the CONSULT-II value with tachometer indication.
Almost the same speed as
the tachometer indication.
MAS A/F SE-B1
See
EC-128, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
B/FUEL SCHDL
See
EC-128, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
A/F ALPHA-B1
A/F ALPHA-B2
See
EC-128, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
COOLAN TEMP/S
●
Engine: After warming up
More than 70
°
C (158
°
F)
HO2S1 (B1)
HO2S1 (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S1 MNTR (B1)
HO2S1 MNTR (B2)
LEAN
←→
RICH
Changes more than 5 times
during 10 seconds.
HO2S2 (B1)
HO2S2 (B2)
●
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
Revving engine from idle up to 3,000 rpm
quickly.
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
LEAN
←→
RICH
VHCL SPEED SE
●
Turn drive wheels and compare the CONSULT-II value with speedometer
indication.
Almost the same speed as
speedometer indication
BATTERY VOLT
●
Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
ACCEL SEN 2*
●
Ignition switch: ON
(engine stopped)
●
Selector lever: D
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
THRTL SEN 1
THRTL SEN 2*
●
Ignition switch: ON
(Engine stopped)
●
Selector lever: D
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
EVAP SYS PRES
●
Ignition switch: ON
Approx. 1.8 - 4.8V
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
EC-124
TROUBLE DIAGNOSIS
P/N POSI SW
●
Ignition switch: ON
Selector lever: P or N
ON
Selector lever: Except above
OFF
PW/ST SIGNAL
●
Engine: After warming up, idle
the engine
Steering wheel: Not being turned
(Forward direction)
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
●
Ignition switch: ON
Rear window defogger switch is ON and/
or lighting switch is in 2nd.
ON
Rear window defogger switch is OFF and
lighting switch is OFF.
OFF
IGNITION SW
●
Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
●
Engine: After warming up, idle
the engine
Heater fan: Operating.
ON
Heater fan: Not operating
OFF
BRAKE SW
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
INJ PULSE-B2
●
Engine: After warming up
●
Selector lever: P or N
●
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
●
Air conditioner switch: OFF
●
No load
Idle
10
°
- 18
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
15% - 35%
2,500 rpm
10% - 35%
MASS AIRFLOW
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
3.8 - 5.2 g·m/s
2,500 rpm
16.0 - 21.5 g·m/s
PURG VOL C/V
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
0%
2,000 rpm
—
INT/V TIM (B1)
INT/V TIM (B2)
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 20
°
CA
INT/V SOL (B1)
INT/V SOL (B2)
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
0% - 2%
2,000 rpm
Approx. 25% - 50%
VIAS S/V
●
Engine speed: Idle
Selector lever: P or N
Engine speed: More than 5,000 rpm
ON
Except above
OFF
AIR COND RLY
●
Engine: After warming up, idle
the engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
MONITOR ITEM
CONDITION
SPECIFICATION
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