Infiniti QX4 (R50). Manual — part 66
7
CHECK THROTTLE POSITION 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. Apply vacuum to the throttle opener, then check the following. Refer to steps 1 and 2 of “Preparation”, “TCM SELF-
DIAGNOSTIC PROCEDURE (No Tools)”, AT-46.
4. Read out “CLOSED THL/SW” and “W/O THRL/P-SW” depressing and releasing accelerator pedal.
Check the signal of throttle position switch is indicated properly.
MTBL0011
SAT646J
OK or NG
OK
©
GO TO 10.
NG
©
GO TO 8.
8
DETECT MALFUNCTIONING ITEM
Check the following items:
I
Throttle position switch
Refer to “Component Inspection”, AT-264.
I
Harness for short or open between ignition switch and throttle position switch (Main harness)
I
Harness for short or open between throttle position switch and TCM (Main harness)
OK or NG
OK
©
GO TO 10.
NG
©
Repair or replace damaged parts.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks) (Cont’d)
AT-261
9
CHECK THROTTLE POSITION SWITCH CIRCUIT (Without CONSULT-II)
Without CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals 16, 17 and ground while depressing, and releasing accelerator pedal slowly.
(after warming up engine)
[Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”, AT-46.]
MTBL0519
SAT526J
OK or NG
OK
©
GO TO 10.
NG
©
GO TO 8.
10
CHECK DTC
Perform Diagnostic procedure, AT-258.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 11.
11
CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
©
INSPECTION END
NG
©
Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks) (Cont’d)
AT-262
SAT144K
COMPONENT INSPECTION
NBAT0204S04
Overdrive Control Switch
NBAT0204S0401
I
Check continuity between two terminals.
Continuity:
Switch position “ON”:
No
Switch position “OFF”:
Yes
SAT517GB
SAT843BG
Park/Neutral Position Switch
NBAT0204S0402
1.
Check continuity between terminals 1 and 2 and between ter-
minals 3 and 4, 5, 6, 7, 8, 9 while moving manual shaft through
each position.
Lever position
Terminal No.
P
1 - 2
3 - 4
R
3 - 5
N
1 - 2
3 - 6
D
3 - 7
2
3 - 8
1
3 - 9
SAT807B
2.
If NG, check again with manual control linkage disconnected
from manual shaft of A/T assembly. Refer to step 1.
3.
If OK on step 2, adjust manual control linkage. Refer to AT-276.
SAT386HC
4.
If NG on step 2, remove PNP switch from A/T and check con-
tinuity of PNP switch terminals. Refer to step 1.
5.
If OK on step 4, adjust PNP switch. Refer to AT-276.
6.
If NG on step 4, replace PNP switch.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks) (Cont’d)
AT-263
SAT132K
Throttle Position Switch
NBAT0204S0403
Closed Throttle Position Switch (Idle Position)
I
Check continuity between terminals 5 and 6.
[Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCE-
DURE (No Tools)”, AT-46.]
Accelerator pedal condition
Continuity
Released
Yes
Depressed
No
I
To adjust closed throttle position switch, refer to EC-431, “System
Description”.
SAT137K
Wide Open Throttle Position Switch
I
Check continuity between terminals 4 and 5.
Accelerator pedal condition
Continuity
Released
No
Depressed
Yes
SAT251JA
A/T Fluid Temperature Switch
NBAT0204S0404
1.
Make sure the A/T fluid warning lamp lights when the key is
inserted and turned to “ON”.
2.
Make sure the A/T fluid warning lamp goes off when turning the
ignition switch to “ON”.
3.
Check resistance between terminal 10 and ground while
changing temperature as shown at left.
Temperature °C (°F)
Resistance
140 (284) or more
Yes
140 (284) or less
No
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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