Geely Emgrand X7. Manual part — 337
Geely Emgrand X7. Manual part - 337
3.5.7.21 P0998 P0999
1. DTC
description:
DTC P0998 Electromagnetic valveS6 high current (short circuit)
DTC P0999 Electromagnetic valveS6low current(open circuit)
The transmission control unit (TCU) uses a variable pressure electromagnetic valve to regulate the hydraulic
pressure. The hydraulic system controls the clutch in the transmission to realize the torque transmission.
The transmission control unit (TCU) can control a certain amount of pressure by adjusting the current of the
electromagnetic valve to enter the clutch and the transmission of the clutch torque is directly related to the current
of the electromagnetic valve.
During operation, the transmission control unit evaluates the current actually delivered to the electromagnetic
valve and compares with the expected. If there is no pre-defined parameter currently, the DTC is set to display
abnormal load of the transmission control unit.
2. Conditions For Setting DTC and The Fault Position :
DTC Code DTC
Detection
Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Position s
P0998
Feed back message of
electromagnetic
valveS6 mean short
circuit
P0999
Feed back message of
electromagnetic
valveS6 mean open
circuit
1. Ignition switch is in the “ON”
position.
2. Electromagnetic valve power on
3. TCU power supply voltage is normal
1. Electromagnetic
valve
2. Electromagnetic
valve Circuit
3. TCU
3. Circuit
sketch
1347
T
C
U
电磁阀
换挡器
档位开关
LEVER
REVERSE
START
VBS5
VBS6
VBS7
V
BS8
VBS9
VBS1
0
O
n
O
ff
1
O
n
O
ff
2
O
n
O
ff
3
O
n
O
ff
4
EMM
INPUT
SHAFT
SPEE
D
SENSOR
OU
TPUT
SHAFT
t
SPE
ED
SENSOR
25
26
10
11
9
8
13
12
24
23
22
21
20
7
6
5
4
3
2
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
J-4
1
18
8
1
3
2
12
14
4
11
12
9
10
15
2
1
4
3
6
5
7
7
J-5
5
16
17
J-5
4
J-5
1
J-5
6
J-5
2
J-5
3
4
11
10
10
15
3
CAN H
启动继电器
倒车信号
输出
主继电器
JF-1
IG2
JB-2
CAN L
10
20
J-3
J-1
J-3
J-2
J-2
J-3
J-3
J-3
J-1
8
J-3
J-3
J-3
J-3
J-3
J-3
J-3
J-3
J-1
J-1
J-1
J-1
J-1
J-1
J-1
J-1
J-1
J-1
J-1
J-1
IF36
NL03-2005c
4. Diagnostic
procedures:
Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and analyze the
accuracy of the data, as these will help with quick diagnosis.
1
Read the fault code again after clearing away the fault code to Check if fault codes, except DTC
P0998 and P0999 exist in the control system.
A. Connect fault diagnosis tester to the datalink connector.
B. Rotated ignition switch to ON position
C. Switch on fault diagnostic device power supply
D. Clear DTC code.
E. Reset reading fault code, and check if DTCs meet setting condition of fault code in current
DTC Codes Shown
To Step
DTC P0998 P0999
Yes
DTCs other than DTCs P0998 and P0999
No
Gears switch
Main relay
JF-1
Reverse output
signal
Start relay JB-2
Shifter
Electromagnetic
valve
1348
2
Detect TCUpower supply circuit
See 3.5.7.8 P0603 P0604 P1604 P1701 P1703
3
Detect S6electromagnetic valve resistance
A. Turn the ignition switch to the OFF position.
B. Disconnect the harness connector J-4 of the
electromagnetic valve.
C. Measure the resistance between Terminals 2 and
1 of the electromagnetic valve harness connector
J-4.
Standard resistant value :4.11Ω-4.17Ω
电磁阀线束连接器
J-4
1
8
20
14
9
15
10
16
11
17
12
18
13
19
2
21
3
22
4
23
5
24
6
25
7
26
SL03-0036c
Does it conform to the standard value?
3
Detect S6electromagnetic valve circuit
No
Yes
Refer to3.4.7.6 fault diagnosis code (DTC) chapter
index
Next
No
Yes
Replace auto-transmission assembly, refer to
3.4.7.6 auto-transmission assembly replacement
Electromagnetic valveharness connectorJ-4
1349
A. rotated ignition switch to OFF position.
B. Disconnect the harness connector J-4 of the
electromagnetic valve.
C. Measure the resistance between Terminal 3 of the
electromagnetic valve harness connector J-4 and
Terminal 6 of the automatic control module J-1.
D. Measure the resistance between Terminal No.1 of
the electromagnetic valve harness connector J-4
and Terminal 7 of the automatic control module
J-1.
E. Turn the ignition switch to the ON position.
F. Measure voltage of electromagnetic valve
harness connector J-4Terminal No.3 and
reliable grounding
自动变速器控制模块线束连接器
J-1
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
16
SL03-0034c
G. Measure the resistance between Terminal No.1 of the electromagnetic valve harness connector J-4 and secure
ground wire.
Results
Test Items
Standard Value
J-4 (3) — J-1(6)
Less than 3 Ω
J-4 (1) — J-1(7)
Less than 3 Ω
J-4 (3) — Reliable grounding voltage value
0 V
J-4 (1) — Reliable grounding resistance value
Less than 3 Ω
Does it conform to the standard value?
4 Replace
TCU
Refer to3.5.7.8 replace automatic transmission control module
5
Go to automatic transmission fresh process.
Refer to3.5.7.4 Automatic transmission refresh process
No
Yes
Circuit malfunction, repair circuit.
Next
Auto-transmissioncontrol module harness connectorJ-1
1350
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