Infiniti Q45 (FY33). Manual — part 14
O/D OFF indicator lamp
8th judgement flicker is longer than others.
SAT674I
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
Go to A/T Fluid Temperature Sensor and TCM Power
Source, AT-147.
12th judgement flicker is longer than others.
SAT678I
The ECM-A/T communication line is open or shorted.
Go to A/T Communication Line (DTC: P0504), AT-157.
9th judgement flicker is longer than others.
SAT675I
Engine speed signal circuit is short-circuited or disconnected.
Go to Engine Speed Signal (DTC: 1207), AT-92.
Flickers as shown below.
SAT679I
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a prob-
lem.)
10th judgement flicker is longer than others.
SAT676I
Turbine revolution sensor circuit is short-circuited or discon-
nected.
Go to Turbine Revolution Sensor, AT-154.
Lamp comes on.
SAT367J
PNP switch, overdrive control switch or throttle position switch
circuit is disconnected, or TCM is damaged.
Go to 21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position Switches),
AT-177.
11th judgement flicker is longer than others.
SAT677I
Line pressure solenoid valve circuit is short-circuited or discon-
nected.
Go to Line Pressure Solenoid Valve (DTC: 1205), AT-125.
t
4
= 1.0 second
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnostic Procedure without CONSULT-II
(Cont’d)
AT-53
SAT631IA
SAT632I
SEF234G
Introduction
The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or PNP switch and provides shift control or lock-up
control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is
capable of diagnosing malfunctioning parts while the ECM can
store malfunctions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the “Work Flow”. Refer to AT-58.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, espe-
cially intermittent ones. Find out what symptoms are present and
under what conditions they occur. A “Diagnostic Worksheet” like the
example (AT-55) should be used.
Start your diagnosis by looking for “conventional” problems first.
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.
Also check related Service bulletins.
TROUBLE DIAGNOSIS — Introduction
AT-54
Diagnostic Worksheet
INFORMATION FROM CUSTOMER
KEY POINTS
WHAT . . Vehicle & A/T model
WHEN . . Date, Frequencies
WHERE . . Road conditions
HOW . . .. Operating conditions, Symptoms
Customer name
MR/MS
Model & Year
VIN
Trans. model
Engine
Mileage
Incident Date
Manuf. Date
In Service Date
Frequency
l
Continuous
l
Intermittent
(
times a day)
Symptoms
l
Vehicle does not move.
(
l
Any position
l
Particular position)
l
No up-shift
(
l
1st
,
2nd
l
2nd
,
3rd
l
3rd
,
O/D)
l
No down-shift
(
l
O/D
,
3rd
l
3rd
,
2nd
l
2nd
,
1st)
l
Lockup malfunction
l
Shift point too high or too low.
l
Shift shock or slip
(
l
N
,
D
l
Lockup
l
Any drive position)
l
Noise or vibration
l
No kickdown
l
No pattern select
l
Others
(
)
O/D OFF indicator lamp
Blinks for about 8 seconds.
l
Continuously lit
l
Not lit
Malfunction indicator lamp (MIL)
l
Continuously lit
l
Not lit
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS — Introduction
AT-55
DIAGNOSTIC WORKSHEET
1.
l
Read the Fail-safe and listen to customer complaints.
2.
l
CHECK A/T FLUID
l
Leakage (Follow specified procedure)
l
Fluid condition
l
Fluid level
3.
l
Perform STALL TEST and LINE PRESSURE TEST.
l
Stall test — Mark possible damaged components/others.
l
Torque converter one-way clutch
l
Reverse clutch
l
Forward clutch
l
Overrun clutch
l
Forward one-way clutch
l
Low & reverse brake
l
Low one-way clutch
l
Engine
l
Line pressure is low
l
Clutches and brakes except high
clutch and brake band are OK
l
Line pressure test — Suspected parts:
4.
l
Perform all ROAD TEST and mark required procedures.
4-1. Check before engine is started
l
SELF-DIAGNOSTIC PROCEDURE — Mark detected items.
l
PNP switch, AT-81.
l
A/T fluid temperature sensor, AT-85.
l
Vehicle speed sensor
⋅
A/T (Revolution sensor), AT-89.
l
Engine speed signal, AT-92.
l
Torque converter clutch solenoid valve, AT-114.
l
Line pressure solenoid valve, AT-125.
l
Shift solenoid valve A, AT-129.
l
Shift solenoid valve B, AT-133.
l
Throttle position sensor, AT-137.
l
Overrun clutch solenoid valve, AT-143.
l
PNP, overdrive control and throttle position switches, AT-177.
l
A/T fluid temperature sensor and TCM power source, AT-147.
l
Vehicle speed sensor
⋅
MTR, AT-151.
l
Turbine revolution sensor, AT-154.
l
A/T communication line, AT-157.
l
Control unit (RAM), control unit (ROM), AT-160.
l
Battery
l
Others
4-2. Check at idle
l
1. O/D OFF Indicator Lamp Does Not Come On, AT-162.
l
2. Engine Cannot Be Started In “P” And “N” Position, AT-163.
l
3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT-
l
4. In “N” Position, Vehicle Moves, AT-164.
l
5. Large Shock. “N”
,
“R” Position, AT-165.
l
6. Vehicle Does Not Creep Backward In “R” Position, AT-166.
l
7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-167.
4-3. Cruise test
Part-1
l
8. Vehicle Cannot Be Started From D
1
, AT-168.
l
9. A/T Does Not Shift: D
1
,
D
2
Or Does Not Kickdown: D
4
,
D
2
, AT-169.
l
10. A/T Does Not Shift: D
2
,
D
3
, AT-170.
l
11. A/T Does Not Shift: D
3
,
D
4
, AT-171.
l
12. A/T Does Not Perform Lock-up, AT-172.
l
13. A/T Does Not Hold Lock-up Condition, AT-173.
l
14. Lock-up Is Not Released, AT-173.
l
15. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
3
), AT-174.
TROUBLE DIAGNOSIS — Introduction
Diagnostic Worksheet (Cont’d)
AT-56
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