Infiniti G20 (P11). Manual — part 66
18. A/T Does Not Shift: D
3
→
2
2
, When Selector
Lever “D”
→
“2” Position
=NCAT0098
SYMPTOM:
A/T does not shift from D
3
to 2
2
when changing selector lever
from “D” to “2” position.
1
CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does “TCM INPUT SIGNALS” in “DATA MONITOR” show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
Yes or No
Yes
©
Check PNP switch circuit. Refer to “DTC P0705”, AT-107.
No
©
Go to 9. A/T Does Not Shift: D
1
,
D
2
or Does Not Kickdown: D
4
,
D
2
, AT-243.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
18. A/T Does Not Shift: D
3
→
2
2
, When Selector Lever “D”
→
“2” Position
AT-261
19. A/T Does Not Shift: 2
2
→
1
1
, When Selector
Lever “2”
→
“1” Position
=NCAT0099
SYMPTOM:
A/T does not shift from 2
2
to 1
1
when changing selector lever
from “2” to “1” position.
1
CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does “TCM INPUT SIGNALS” in “DATA MONITOR” show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
Yes or No
Yes
©
Check PNP switch circuit. Refer to “DTC P0705”, AT-107.
No
©
GO TO 2.
2
CHECK SYMPTOM
Check again.
SAT778B
OK or NG
OK
©
INSPECTION END
NG
©
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
TROUBLE DIAGNOSES FOR SYMPTOMS
19. A/T Does Not Shift: 2
2
→
1
1
, When Selector Lever “2”
→
“1” Position
AT-262
20. Vehicle Does Not Decelerate By Engine
Brake
=NCAT0100
SYMPTOM:
Vehicle does not decelerate by engine brake when shifting
from 2
2
(1
2
) to 1
1
.
1
CHECK SYMPTOM
Is 6. Vehicle Does Not Creep Backward In “R” Position OK?
Yes or No
Yes
©
Go to 15. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
3
), AT-257.
No
©
Go to 6. Vehicle Does Not Creep Backward In “R” Position, AT-234.
SAT088JA
SAT360H
SAT413J
21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position
Switches Circuit Checks)
NCAT0101
SYMPTOM:
O/D OFF indicator lamp does not come on in TCM self-diag-
nostic procedure even if the lamp circuit is good.
DESCRIPTION
NCAT0101S01
I
PNP switch
The PNP switch assembly includes a transmission range
switch. The transmission range switch detects the selector
lever position and sends a signal to the TCM.
I
Overdrive control switch
Detects the overdrive control switch position (ON or OFF) and
sends a signal to the TCM.
I
Throttle position switch
Consists of a wide open throttle position switch and a closed
throttle position switch.
The wide open throttle position switch sends a signal to the
TCM when the throttle valve is open at least 1/2 of the full
throttle position. The closed throttle position switch sends a
signal to the TCM when the throttle valve is fully closed.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
20. Vehicle Does Not Decelerate By Engine Brake
AT-263
DIAGNOSTIC PROCEDURE
NCAT0101S02
1
CHECK PNP SWITCH CIRCUIT (With CONSULT-II)
With CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out “P/N”, “R”, “D”, “2” and “1” position switches moving selector lever to each position.
Check that the signal of the selector lever position is indicated properly.
SAT701J
OK or NG
OK
©
GO TO 3.
NG
©
Check the following items:
I
PNP switch (Refer to “Component Inspection”, AT-270.)
I
Harness for short or open between ignition switch and PNP switch (Main harness)
I
Harness for short or open between PNP switch and TCM (Main harness)
I
Diode (P, N positions)
TROUBLE DIAGNOSES FOR SYMPTOMS
21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks) (Cont’d)
AT-264
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