Infiniti G20 (P11). Manual — part 292
16
CHECK EVAP CANISTER VENT CONTROL VALVE-III
1. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
2. Perform the Test No. 15 again.
OK or NG
OK
©
GO TO 17.
NG
©
Replace EVAP canister vent control valve.
17
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-146.
©
INSPECTION END
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1491 VACUUM CUT VALVE BYPASS VALVE
Diagnostic Procedure (Cont’d)
EC-579
System Description
NCEC0418
The malfunction information related to A/T (Automatic Transaxle) is transferred through the line (circuit) from
TCM (Transmission Control Module) to ECM. Therefore, be sure to erase the malfunction information such as
DTC not only in TCM (Transmission Control Module) but also ECM after the A/T related repair.
ECM Terminals and Reference Value
NCEC0419
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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
91
PU
A/T check signal
[Ignition switch “ON”]
0 - Approximately 5V
On Board Diagnosis Logic
NCEC0420
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P1605
I
An incorrect signal from TCM (Transmission Control
Module) is sent to ECM.
I
Harness or connectors
[The communication line circuit between ECM
and TCM (Transmission Control Module) is open
or shorted.]
I
Dead (Weak) battery
I
TCM (Transmission Control Module)
SEF058Y
DTC Confirmation Procedure
NCEC0421
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously
conducted, always turn ignition switch “OFF” and wait at least 10
seconds before conducting the next test.
With CONSULT
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT.
3)
Start engine and let it idle for at least 40 seconds.
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-582.
With GST
Follow the procedure “With CONSULT-II” above.
DTC P1605 A/T DIAGNOSIS COMMUNICATION LINE
System Description
EC-580
Wiring Diagram
NCEC0422
TEC721
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1605 A/T DIAGNOSIS COMMUNICATION LINE
Wiring Diagram
EC-581
Diagnostic Procedure
NCEC0423
1
CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and TCM harness connector.
Selector
lever
TCM (Transmission
control module)
SEF313W
3. Check harness continuity between ECM terminal 91 and TCM terminal 15.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 2.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
2
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-146.
©
INSPECTION END
DTC P1605 A/T DIAGNOSIS COMMUNICATION LINE
Diagnostic Procedure
EC-582
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