Engine Control NISSAN ALMERA N16 2003 Electronic Repair Manual

DTC CONTROL UNIT (RAM), CONTROL UNIT (ROM)
AT-205
[EURO-OBD]
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DTC CONTROL UNIT (RAM), CONTROL UNIT (ROM)PFP:31036
DescriptionECS007PX
The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE” has been previously conducted,
always turn ignition switch “OFF” and wait at least 5 seconds before conducting the next test.
With CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode for
A/T with CONSULT-II.
2. Start engine.
3. Run engine for at least 2 seconds at idle speed.
4. If DTC is detected, go to AT- 2 0 6 , "
Diagnostic Procedure" .
Without CONSULT-II
Follow the procedure “With CONSULT-II”.
SAT574J
Diagnostic Trouble Code No. Malfunction is detected when.... Check Item (Possible Cause)
: CONTROL UNIT (RAM),
CONTROL UNIT (ROM)TCM memory (RAM) or (ROM) is malfunc-
tioning.
●TCM
SAT014K
SAT971J

DTC CONTROL UNIT (EEP ROM)
AT-207
[EURO-OBD]
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DTC CONTROL UNIT (EEP ROM)PFP:31036
DescriptionECS007PZ
The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE” has been previously conducted,
always turn ignition switch “OFF” and wait at least 5 seconds before conducting the next test.
With CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode for
A/T with CONSULT-II.
2. Start engine.
3. Run engine for at least 2 seconds at idle speed.
4. If DTC is detected, go to AT- 2 0 8 , "
Diagnostic Procedure" .
Without CONSULT-II
Follow the procedure “With CONSULT-II”.
SAT574J
Diagnostic trouble code Malfunction is detected when... Check item (Possible cause)
: CONT UNIT (EEP ROM)TCM memory (EEP ROM) is malfunction-
ing.
●TCM
SAT014K
SAT971J

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-211
[EURO-OBD]
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1. O/D OFF Indicator Lamp Does Not Come OnECS007Q2
SYMPTOM:
O/D OFF indicator lamp does not come on for about 2 seconds when turning ignition switch to “ON”.
1.CHECK GROUND CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device terminals 7 and ground.
If OK, 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 LAMP CIRCUIT
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Disconnect A/T device harness connector.
3. Check voltage between A/T device terminals 8 and ground.
OK or NG
OK >> GO TO 3
NG >> Check the following items:
●Harness for short or open between combination
meter terminals 47 and A/T device terminals 8.
3.CHECK OVERDRIVE CONTROL SWITCH
1. Disconnect A/T device harness connector.
2. Check continuity between A/T device terminals 7 and 8.
OK or NG
OK >>INSPECTION END.
NG >> Repair or replace A/T device.Continuity should exist.
MCIB0007E
Voltage: Battery voltage
MCIB0008E
OVERDRIVE CONTROL SW “ON”: Continuity should not exist.
OVERDRIVE CONTROL SW “OFF”: Continuity should exist.

AT-212
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
2. Engine Cannot Be Started In “P” and “N” Position
ECS007Q3
SYMPTOM:
●Engine cannot be started with selector lever in “P” or “N” position.
●Engine can be started with selector lever in “D”, “2”, “1” or “R” 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?
Ye s o r N o
Yes >> Check PNP switch circuit. Refer to AT- 2 3 7 , "21. TCM
Self-diagnosis Does Not Activate (PNP & Overdrive
Control Switches, and Throttle Position Sensor Circuit
Checks)" .
No >> GO TO 2
2. CHECK PNP SWITCH INSPECTION
Check for short or open of PNP switch harness connector terminals 1 and 2.
Refer to AT- 2 3 7 , "
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position Sensor Circuit
Checks)" .
OK or NG
OK >> GO TO 3
NG >> Repair or replace PNP switch.
3. CHECK STARTING SYSTEM
Check starting system. Refer to SC-13, "STARTING SYSTEM".
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
SCIA0706E
SAT408JA

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-231
[EURO-OBD]
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13. A/T Does Not Hold Lock-up ConditionECS007QE
SYMPTOM:
A/T does not hold lock-up condition for more than 30 seconds.
1.CHECK DIAGNOSTIC RESULTS
Does self-diagnosis show damage to engine speed signal circuit
after cruise test?
Ye s o r N o
Yes >> Check engine speed signal circuit. Refer to AT- 1 2 9 ,
"DTC P0725 ENGINE SPEED SIGNAL" .
No >> GO TO 2
2.CHECK A/T FLUID CONDITION
1. Remove oil pan, refer to AT- 4 0 6 , "
REMOVAL" .
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 3
NG >> GO TO 5
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT- 4 0 6 , "
Control Valve Assembly and Accumulators" .
2. Check the following items:
–Torque converter clutch control valve
–Pilot valve
–Pilot filter
OK or NG
OK >> GO TO 4
NG >> Repair or replace damaged parts.
4.CHECK SYMPTOM
Check again.
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 connector.
SCIA0773E
SAT171B

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-233
[EURO-OBD]
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15. Engine Speed Does Not Return To Idle (Light Braking D4→ D3 )ECS007QG
SYMPTOM:
●Engine speed does not smoothly return to idle when A/T shifts from D4 to D3 .
●Vehicle does not decelerate by engine brake when turning overdrive control switch OFF.
●Vehicle does not decelerate by engine brake when shifting A/T from “D” to “2” position.
1.CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to overrun clutch solenoid valve
circuit after cruise test?
Ye s o r N O
Yes >> Check overrun clutch solenoid valve circuit. Refer to AT-
187, "DTC P1760 OVERRUN CLUTCH SOLENOID
VA LV E" .
No >> GO TO 2
2.CHECK THROTTLE POSITION SENSOR*
*: This sensor means accelerator pedal position (APP) sensor.
Refer to AT- 1 8 1 , "
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR" .
OK or NG
OK >> GO TO 3
NG >> Repair or replace accelerator pedal position (APP) sen-
sor. (AT- 1 8 1 , "
DTC P1705 ACCELERATOR PEDAL
POSITION (APP) SENSOR" )
3.CHECK A/T FLUID CONDITION
1. Remove oil pan, refer to AT- 4 0 6 , "
REMOVAL" .
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 4
NG >> GO TO 6
SCIA0774E
MCIB9006E
SAT171B

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-237
[EURO-OBD]
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20. Vehicle Does Not Decelerate By Engine BrakeECS007QL
SYMPTOM:
Vehicle does not decelerate by engine brake when shifting from 2
2 (12 ) to 11 .
1.CHECK SYMPTOM
Is 6. Vehicle Does Not Creep Backward In “R” Position OK?
Ye s o r N o
Yes >> Go to AT-233, "15. Engine Speed Does Not Return To Idle (Light Braking D4→ D3 )" .
No >> Go to AT- 2 1 6 , "
6. Vehicle Does Not Creep Backward In “R” Position" .
21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches,
and Throttle Position Sensor Circuit Checks)
ECS007QM
SYMPTOM:
O/D OFF indicator lamp does not come on in TCM self-diagnostic procedure even if the lamp circuit is
good.
DESCRIPTION
●PNP switch
The PNP switch assembly includes a transmission position switch. The transmission position switch
detects the selector lever position and sends a signal to the TCM.
●Overdrive control switch
SCIA0752E
SCIA0776E
MCIB9006E

AT-238
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
Detects the overdrive control switch position (ON or OFF) and sends a signal to the TCM.
●Throttle position sensor*
*: This sensor means accelerator pedal position (APP) sensor.
Electric throttle control actuator consists of throttle control motor, acceleration pedal position sensor, throt-
tle position sensor, etc. The actuator sends a signal to the TCM.
DIAGNOSTIC PROCEDURE
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.
OK or NG
OK >> GO TO 3
NG >> Check the following items:
●PNP switch (Refer to AT- 2 4 2 , "COMPONENT
INSPECTION" .)
●Harness for short or open between ignition switch and
PNP switch
●Harness for short or open between PNP switch and
TCM
●Diode (P, N positions)
SAT701J

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-239
[EURO-OBD]
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2.CHECK PNP 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 26, 27, 34, 35, 36 and
ground while moving selector lever through each position.
OK or NG
OK >> GO TO 4
NG >> Check the following items:
●PNP switch (Refer to AT- 2 4 2 , "COMPONENT
INSPECTION" .)
●Harness for short or open between ignition switch and
PNP switch
●Harness for short or open between PNP switch and TCM
●Diode (P, N positions)
3.CHECK OVERDRIVE CONTROL 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 “OVERDRIVE SWITCH”.
Check the signal of the overdrive control switch is indicated properly.
(Overdrive control switch “ON” displayed on CONSULT-II means
overdrive “OFF”.)
OK or NG
OK >> GO TO 5
NG >> Check the following items:
●Overdrive control switch (Refer to AT- 2 4 2 , "COMPO-
NENT INSPECTION" .)
●Harness for short or open between TCM and over-
drive control switch
●Harness of ground circuit for overdrive control switch
for short or open Vo l t a g e :
B: Battery voltage
0: 0V
Lever posi-
tionTerminal No.
36 35 34 27 26
P, N B 0 0 0 0
R0B000
D0 0B00
2000B0
10000B
SCIA0777E
SAT645J

AT-240
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
4. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT (WITHOUT CONSULT-II)
Without CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between A/T device connector terminal 2 and ground when overdrive control switch is “ON”
and “OFF”.
OK or NG
OK >> GO TO 6
NG >> Check the following items:
●Overdrive control switch (Refer to AT-242, "COMPONENT INSPECTION" .)
●Harness for short or open between TCM and overdrive control switch
●Harness of ground circuit for overdrive control switch for short or open
Voltage:
Switch position “ON”:
Battery voltage
Switch position “OFF”:
1V or less