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Old 04-19-2012, 04:53 AM   #6
Nahkapohjola
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Re: No 3rd or 4th gear - MAXIMA 00

Quote:
Originally Posted by Nahkapohjola View Post
...

First of all, see that the A/T computer gets full charge power: has to be over 13,5V while engine running.

Try to get the FSM....



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The A/T system has two self-diagnostic systems.

The first is the emission-related on board diagnostic system (OBD-II) performed by the TCM (transmission
control module) in combination with the ECM. The malfunction is indicated by the MIL (malfunction indicator
lamp) and is stored as a DTC in the ECM memory but not the TCM memory.
The second is the TCM original self-diagnosis indicated by the O/D OFF indicator lamp. The malfunction is
stored in the TCM memory. The detected items are overlapped with OBD-II self-diagnostic items. For detail,
refer to AT-52.

OBD-II Function for A/T System
The ECM provides emission-related on board diagnostic (OBD-II) functions for the A/T system. One function
is to receive a signal from the TCM used with OBD-related parts of the A/T system. The signal is sent to the
ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a
diagnostic result by means of the MIL (malfunction indicator lamp) on the instrument panel. Sensors, switches
and solenoid valves are used as sensing elements.
The MIL automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation
to A/T system parts.

ONE TRIP DETECTION LOGIC
One or Two Trip Detection Logic of OBD-II
If a malfunction is sensed during the first test drive, the MIL will illuminate and the malfunction will be stored
in the ECM memory as a DTC. The TCM is not provided with such a memory function.

TWO TRIP DETECTION LOGIC
When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC
(diagnostic trouble code) or 1st trip freeze frame data. At this point, the MIL will not illuminate. — First Trip
If the same malfunction as that experienced during the first test drive is sensed during the second test drive,
the MIL will illuminate. — Second Trip
A/T-related parts for which the MIL illuminates during the first or second test drive are listed below.

MIL
One trip detection Two trip detection
Shift solenoid valve A — DTC: P0750 (0750) X
Shift solenoid valve B — DTC: P0755 (0755) X
Throttle position sensor or switch — DTC: P1705 (1705) X
Except above X
The “trip” in the “One or Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation.




Diagnostic Procedure Without CONSULT-II
OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)
Refer to EC-109, “Generic Scan Tool (GST)”.
OBD-II SELF-DIAGNOSTIC PROCEDURE (NO
TOOLS)
Refer to EC-89, “Malfunction Indicator Lamp (MIL)”.
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Preparation
1. Turn ignition switch to “OFF” position.
2. Connect the handy type vacuum pump to the throttle opener
and apply vacuum –25.3 kPa (–190 mmHg, –7.48 inHg).
3. Disconnect the throttle position switch harness connector.
4. Turn ignition switch to “ON” position.
5. Check continuity of the closed throttle position switch.
Continuity should exist.
(If continuity does not exist, check throttle opener and
closed throttle position switch. Then increase vacuum
until closed throttle position switch shows continuity.)
6. Go to “DIAGNOSIS START” on next page.




1 CHECK O/D OFF INDICATOR LAMP
1. Move selector lever to P position.
Start engine and warm it up to normal engine operating temperature.
2. Turn ignition switch to OFF position.
3. Wait 5 seconds.
4. Turn ignition switch to ON position.
(Do not start engine.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnostic Procedure Without CONSULT-II (Cont’d)
5. Does O/D OFF indicator lamp come on for about 2 seconds?
YesorNo
Yes © GO TO 2.
No © Stop procedure. Perform “1. O/D OFF Indicator Lamp Does Not Come On”, AT-219
before proceeding.

P.219 CHECK POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.
2. Check voltage between TCM terminal 28 and ground.

P.220 CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 25, 48 and ground.

CHECK LAMP CIRCUIT (if no light)
1. Turn ignition switch to OFF position.
2. Check resistance between TCM terminals 10 and 13.
Resistance: 50 - 100Ω


Description
The revolution sensor detects the revolution of the idler gear parking
pawl lock gear and emits a pulse signal. The pulse signal is sent
to the TCM which converts it into vehicle speed.

TCM TERMINALS AND REFERENCE VALUE No.
Wire color Item Condition
29 W Revolution sensor
42 B Throttle position sensor (Ground)

When moving at 20 km/h (12 MPH), use the CONSULT-II pulse frequency measuring function.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle diagnosis connector.
*1: A circuit tester cannot be used to test this item.
Judgement standard 450 Hz (Approx.)
When vehicle parks. Under 1.3V or over 4.5V



TCM INSPECTION TABLE (Data are reference values.)
Wire color Item Condition Judgement
1 G/R
Line pressure solenoid valve
2 W/B
Line pressure sole-noid valve (with dropping resistor)
3 G/B
Torque converter clutch solenoid valve
10 R/Y Power source or When turning ignition switch to ON.
11 R/Y Shift solenoid valve A
12 LG/B Shift solenoid valve B
13 G/Y O/D OFF indicator lamp
16 GY/L Closed throttle position switch (in throttle position switch)
17 P Wide open throttle position switch (in throttle position switch)
18 Y ASCD cruise switch
9 R/Y Power source Same as No. 10
20 BR/Y Overrun clutch solenoid valve
22 G/Y Overdrive control switch
24 L ASCD OD cut sig- nal
25 B Ground
26 PU/W
PNP switch 1 posi-
27 P/B
PNP switch 2 posi-tion
28 Y/R Power source (Memory back-up)
29 W Revolution sensor
30** BR/Y Data link connector
31** P Data link connector
32 R Throttle position sensor (Power source)
33* Y/B LAN
34 Y/PU PNP switch D posi-
35 G/W PNP switch R posi-tion
36 R/G PNP switch P or N position
39 W/G Engine speed sig-nal
40 PU/R Vehicle speed sen-sor
41 W Throttle positionsensor
42 B Throttle position sensor (Ground)
45 R/G Stop lamp switch
47 G A/T fluid tempera- ture sensor
48 B Ground

AT-95
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Maxima INFO pages was deliberately trashed (!?) by Cardomain; dont goto http://www.cardomain.com/ride/748507

There was a special Car Electronics -page http://www.cardomain.com/ride/748507/14
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