Nissan Almera Tino V10 (2001 year). Manual — part 67
15
ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II
Without CONSULT-II
1. Temporarily tighten sensor body fixing bolts as follows.
+
Gradually move the sensor body clockwise and stop it when the continuity comes to exist, then temporarily
tighten sensor body fixing bolts.
SEF867X
2. Make sure two or three times that the continuity exists when the throttle valve is closed and continuity does not exist
when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the continuity does not exist when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the continuity again.
Continuity does not exist while closing the throttle valve.
OK or NG
OK
©
GO TO 16.
NG
©
GO TO 14.
16
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
Without CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 6.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7, 20 times.
©
GO TO 17.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models with Throttle Opener) (Cont’d)
EC-633
17
CHECK IGNITION TIMING-I
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Release vacuum from throttle opener.
3. Remove vacuum pump and vacuum hose from throttle opener.
4. Reinstall original vacuum hose to throttle opener securely.
5. Start engine and warm it up to normal operating temperature.
6. Stop engine and disconnect throttle position sensor harness connector.
SEF770Z
7. Start engine.
8. Check ignition timing at idle using a timing light.
SEF284G
Ignition timing:
15°
±
2° BTDC (in “P” or “N” position)
OK or NG
OK
©
GO TO 18.
NG
©
1. Adjust ignition timing by turning distributor.
2. GO TO 18.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models with Throttle Opener) (Cont’d)
EC-634
18
CHECK IGNITION TIMING-II
1. Stop engine.
2. Reconnect throttle position sensor harness connector.
3. Start engine and let it idle.
4. Check ignition timing at idle using a timing light.
SEF984U
Ignition timing:
15°
±
2° BTDC (in “P” or “N” position)
OK or NG
OK
©
GO TO 29.
NG
©
GO TO 19.
19
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-581.
Is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 20.
INCMP
©
Follow the instruction of “Idle Air Volume Learning”.
20
CHECK IGNITION TIMING AGAIN
Check ignition timing again. Refer to Test No. 12 (With CONSULT-II) or 18 (Without CONSULT-II).
OK or NG
OK (With CONSULT-II)
©
GO TO 26.
OK (Without CONSULT-
II)
©
GO TO 29.
NG
©
GO TO 21.
21
CHECK FOR INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an air leak from PCV hose and after IACV-AAC valve.
OK or NG
OK
©
GO TO 23.
NG
©
GO TO 22.
22
REPAIR MALFUNCTION
1. Stop engine.
2. Repair or replace malfunctioning part.
©
GO TO 19.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models with Throttle Opener) (Cont’d)
EC-635
23
DETECT MALFUNCTIONING PART
Check the IACV-AAC valve circuit and function. Refer to EC-863 (Models with Euro-OBD system) or EC-995 (Models with-
out Euro-OBD system).
OK or NG
OK
©
GO TO 25.
NG
©
GO TO 24.
24
REPAIR MALFUNCTION
Repair or replace malfunction part following the “Diagnostic Procedure” corresponding the detected malfunction.
©
GO TO 19.
25
CHECK ECM FUNCTION
1. Substitute another known good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to “NATS (Nissan Anti-theft
System)”, EC-597.
©
GO TO 19.
26
CHECK TARGET IDLE SPEED
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode.
3. Check idle speed.
750
±
50 rpm (in “P” or “N” position)
OK or NG
OK
©
GO TO 32.
NG
©
GO TO 27.
27
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-581.
Is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 28.
INCMP
©
Follow the instruction of “Idle Air Volume Learning”.
28
CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
750
±
50 rpm (in “P” or “N” position)
OK or NG
OK
©
GO TO 32.
NG
©
GO TO 21.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models with Throttle Opener) (Cont’d)
EC-636
29
CHECK TARGET IDLE SPEED
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
750
±
50 rpm (in “P” or “N” position)
OK or NG
OK
©
GO TO 32.
NG
©
GO TO 30.
30
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-581.
Is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 31.
INCMP
©
Follow the instruction of “Idle Air Volume Learning”.
31
CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
750
±
50 rpm (in “P” or “N” position)
OK or NG
OK
©
GO TO 32.
NG
©
GO TO 21.
32
ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-594, and “HOW TO ERASE
DTC”, AT-19 .
©
INSPECTION END
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models with Throttle Opener) (Cont’d)
EC-637
Basic Inspection (Models without Throttle
Opener)
=NLEC1930
Precaution:
Perform Basic Inspection without electrical or mechanical
loads applied;
+
Headlamp switch is OFF,
+
On vehicles equipped with daytime running light system, set
lighting switch to the 1st position to light only small lamps.
+
Air conditioner switch is OFF,
+
Rear window defogger switch is OFF,
+
Steering wheel is in the straight-ahead position, etc.
1
INSPECTION START
1. Check service records for any recent repairs that may indicate a related problem, or the current need for scheduled
maintenance.
2. Open engine hood and check the following:
+
Harness connectors for improper connections
+
Vacuum hoses for splits, kinks, or improper connections
+
Wiring for improper connections, pinches, or cuts
+
Air cleaner clogging
+
Hoses and ducts for leaks
SEF983U
©
GO TO 2.
2
CHECK THROTTLE DRUM OPERATION
Confirm that throttle drum is in contact with the stopper.
OK or NG
OK (with CONSULT-II)
©
GO TO 5.
OK (without CONSULT-
II)
©
GO TO 8.
NG
©
GO TO 3.
3
CHECK ACCELERATOR WIRE INSTALLATION
Check accelerator wire for slack.
OK or NG
OK
©
GO TO 4.
NG
©
Adjust accelerator wire. Refer to FE section, “Adjusting Accelerator Wire”.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener)
EC-638
4
CHECK THROTTLE VALVE OPERATION
1. Remove intake air ducts.
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK
©
Retighten the throttle drum fixing nuts.
NG
©
Clean the throttle body and throttle valve.
5
CHECK CLOSED THROTTLE POSITION SWITCH IDLE POSITION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Turn ignition switch “ON”.
4. Select “THRTL POS SEN” and “CLSD THL POS” in “DATA MONITOR” mode with CONSULT-II.
5. Make sure that “THRTL POS SEN” indicates 0.35 to 0.65V, and “CLSD THL POS” indicates “ON”. (Accelerator pedal is
fully released).
NEF238A
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 6.
6
ADJUSTMENT THROTTLE POSITION SENSOR IDLE POSITION
With CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until “THRTL POS SEN” indication becomes 0.35 to
0.65V.
SEF964W
3. Tighten the throttle position sensor fixing bolts.
©
GO TO 7.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-639
7
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cold, the throttle position sensor idle posi-
tion memory will not reset correctly.
1. Start engine and warm it up to normal operating temperature.
2. Select “CLSD THL POS” in “DATA MONITOR” mode with CONSULT-II.
3. Stop engine. (Turn ignition switch “OFF”.)
4. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
5. Turn ignition switch “OFF” and wait at least 5 seconds.
6. Repeat steps 4 and 6 until “CLSD THL POS” indication changes to “ON”.
SEF061Y
©
GO TO 11.
8
CHECK THROTTLE POSITION SENSOR IDLE POSITION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Turn ignition switch “ON”.
4. Check voltage between ECM terminal 92 and ground with accelerator pedal fully released.
NEF239A
Voltage: 0.35 to 0.65V
OK
©
GO TO 6.
NG
©
GO TO 9.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-640
9
ADJUST THROTTLE POSITION SENSOR IDLE POSITION
Without CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until the voltage between ECM terminal 92 and ground
becomes 0.35 to 0.65V.0
SEF964W
3. Tighten the throttle position sensor fixing bolts.
©
GO TO 10.
10
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
Without CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cold, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine and warm it up to normal operating temperature.
2. Stop engine. (Turn ignition switch “OFF”).
3. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
4. Turn ignition switch “OFF” and wait at least 9 seconds.
5. Repeat steps 4 and 6, 20 times.
©
GO TO 11.
11
CHECK (1ST TRIP) DTC
1. Start engine and warm it up to normal operating temperature.
2. Rev (2,000 to 3,000 rpm) two or three times.
3. Make sure no (1st trip) DTC is displayed with CONSULT-II GST or Diagnostic Test Mode II (Self-diagnostic Results).
OK or NG
OK
©
GO TO 13.
NG
©
GO TO 12.
12
REPAIR MALFUNCTION
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
©
GO TO 11.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-641
13
CHECK TARGET IDLE SPEED
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700
±
50 rpm
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700
±
50 rpm
OK or NG
OK
©
GO TO 22.
NG
©
GO TO 14.
14
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-57
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 15.
INCMP
©
1. Follow the instruction of “Idle Air Volume Learning”.
2. GO TO 14.
15
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700
±
50 rpm
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700
±
50 rpm
OK or NG
OK
©
GO TO 20.
NG
©
GO TO 16.
16
REPLACE IACV-AAC VALVE
Replace IACV-AAC valve.
©
GO TO 17.
17
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-581
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 18.
INCMP
©
1. Follow the instruction of “Idle Air Volume Learning”.
2. GO TO 14.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-642
18
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
750
±
50 rpm
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
750
±
50 rpm
OK or NG
OK
©
GO TO 20.
NG
©
GO TO 19.
19
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to “NATS (Nissan Anti-Theft
system)”, EC-597
©
GO TO 14.
20
CHECK IGNITION TIMING
1. Start engine and warm it up to normal operating temperature.
2. Check ignition timing at idle using a timing light.
SEF984U
Ignition timing
15°
±
2° BTDC
OK or NG
OK
©
GO TO 28.
NG
©
GO TO 21.
21
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM section.
OK or NG
OK
©
GO TO 19.
NG
©
1. Repair the timing chain installation.
2. GO TO 14.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-643
22
CHECK IGNITION TIMING
1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.
SEF984U
Ignition timing:
15°
±
2° BTDC
OK or NG
OK
©
GO TO 28.
NG
©
GO TO 23.
23
PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-581.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
GO TO 24.
INCMP
©
GO TO 23.
24
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
750
±
50 rpm
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
750
±
50 rpm
OK or NG
OK
©
GO TO 26.
NG
©
GO TO 15.
25
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case).
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to “NATS (Nissan Anti-Theft
System)”, EC-597.
©
GO TO 23.
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-644
26
CHECK IGNITION TIMING AGAIN
Check ignition timing again. Refer to Test No. 22.
OK or NG
OK
©
GO TO 28.
NG
©
GO TO 27.
27
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM section.
OK or NG
OK
©
GO TO 25.
NG
©
1. Repair the timing chain installation.
2. GO TO 23.
28
ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM.
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-594.
©
INSPECTION END
TROUBLE DIAGNOSIS — BASIC INSPECTION
SR20DE
Basic Inspection (Models without Throttle Opener) (Cont’d)
EC-645
DTC Inspection Priority Chart
NLEC1370
If some DTCs are displayed at the same time, perform inspections one by one based on the following prior-
ity chart.
Priority
Detected items (DTC)
1
+
P0100 Mass air flow sensor
+
P0110 Intake air temperature sensor
+
P0115 Engine coolant temperature sensor
+
P0120 Throttle position sensor
+
P0325 Knock sensor
+
P0340 Camshaft position sensor
+
P0403 EGR volume control valve (where fitted)
+
P0500 Vehicle speed sensor
+
P0605 ECM
+
P0335, P1336 Crankshaft position sensor (OBD)
+
P1320 Ignition signal
+
P1605 A/T diagnostic communication line
+
P1706 Park/Neutral position switch
2
+
P0130 - P0134 Heated oxygen sensor 1 (front)
+
P0135 Heated oxygen sensor 1 heater (front)
+
P0137 - P0140 Heated oxygen sensor 2 (rear)
+
P0141 Heated oxygen sensor 2 heater (rear)
+
P0443 EVAP canister purge volume control solenoid valve
+
P0510 Closed throttle position switch
+
P0705 - P0725, P0740 - P1791 CVT related sensors, solenoid valves and switches
+
P1217 Overheat (Cooling system)
+
P1401 EGR temperature sensor (where fitted)
3
+
P0171, P0172 Fuel injection system function
+
P0300 - P0304 Misfire
+
P0400, P1402 EGR function (where fitted)
+
P0420 Three way catalyst function
+
P0505 IACV-AAC valve
+
P1778 CVT step motor function
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
DTC Inspection Priority Chart
EC-646
Fail-safe Chart
=NLEC1371
The ECM enters fail-safe mode if any of the following malfunctions is detected due to the open or short cir-
cuit. When the ECM enters the fail-safe mode, the MI illuminates.
DTC No.
Detected items
Engine operating condition in fail-safe mode
CON-
SULT-II
GST
ECM*1
P0100
0100
Mass air flow sensor
circuit
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0115
0115
Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the time
after turning ignition switch “ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
The radiator fan operates.
Condition
Engine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned
ON or Start
40°C (104°F)
More than approx. 4 minutes
after ignition ON or Start
80°C (176°F)
Except as shown above
40 - 80°C (104 - 176°F)
(Depends on the time)
P0120
0120
Throttle position sensor
circuit
Throttle position will be determined based on the injected fuel amount and
the engine speed. Therefore, acceleration will be poor.
Condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
Unable to
access
ECM
Unable to
access
Diagnostic
Test Mode
II
ECM
ECM fail-safe activating condition
The computing function of the ECM was judged to be malfunctioning.
When the fail-safe system activates (i.e., if the ECM detects a malfunction
condition in the CPU of ECM), the MI on the instrument panel lights to warn
the driver.
However it is not possible to access ECM and DTC cannot be confirmed.
Engine control with fail-safe
When ECM fail-safe is operating, fuel injection, ignition timing, fuel pump
operation and IACV-AAC valve operation are controlled under certain limita-
tions.
ECM fail-safe operation
Engine speed
Engine speed will not rise more than
3,000 rpm
Fuel injection
Simultaneous multiport fuel injection sys-
tem
Ignition timing
Ignition timing is fixed at the preset value
Fuel pump
Fuel pump relay is “ON” when engine is
running and “OFF” when engine stalls
IACV-AAC valve
Full open
Replace ECM, if ECM fail-safe condition is confirmed.
*: In Diagnostic Test Mode II (Self-diagnostic results)
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
Fail-safe Chart
EC-647
Symptom Matrix Chart
NLEC1372
SYSTEM — ENGINE CONTROL SYSTEM
NLEC1372S01
SYMPTOM
Reference
page
HARD/NO
ST
AR
T/REST
AR
T
(EXCP
.
HA)
ENGINE
ST
ALL
HESIT
A
TION/SURGING/FLA
T
SPOT
SP
ARK
KNOCK/DET
ONA
TION
LACK
OF
POWER/POOR
ACCELERA
TION
HIGH
IDLE/LOW
IDLE
ROUGH
IDLE/HUNTING
IDLING
VIBRA
TION
SLOW/NO
RETURN
T
O
IDLE
OVERHEA
TS/W
A
TER
TEMPERA
TURE
HIGH
EXCESSIVE
FUEL
CONSUMPTION
EXCESSIVE
OIL
CONSUMPTION
BA
TTER
Y
DEAD
(UNDER
CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG AH
AJ
AK
AL
AM HA
Fuel
Fuel pump circuit
1
1
2
3
2
2
2
3
2
Fuel pressure regulator system
3
3
4
4
4
4
4
4
4
4
Injector circuit
1
1
2
3
2
2
2
2
Evaporative emission system
3
3
4
4
4
4
4
4
4
4
Air
Positive crankcase ventilation sys-
tem
3
3
4
4
4
4
4
4
4
4
1
Incorrect idle speed adjustment
3
3
1
1
1
1
1
IACV-AAC valve circuit
1
1
2
3
3
2
2
2
2
2
2
Ignition
Incorrect ignition timing adjust-
ment
3
3
1
1
1
1
1
1
Ignition circuit
1
1
2
2
2
2
2
2
EGR
(where
fitted)
EGR volume control valve circuit
2
2
3
3
3
EGR system
2
1
2
3
3
3
2
2
3
3
Main power supply and ground circuit
2
2
3
3
3
3
3
2
3
2
Air conditioner circuit
2
2
3
3
3
3
3
3
3
3
2
HA section
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
Symptom Matrix Chart
EC-648
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