Page 150 of 3502

AT-142
A/T 2ND GEAR FUNCTION
Diagnostic ProcedureBCS0013A
1. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve B
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 9 6 , "
Wiring Diagram —
AT — SSV/B" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace shift solenoid valve assembly.
2. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
96, "Wiring Diagram — AT — SSV/B" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace shift solenoid valve assembly.
3. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check to ensure that:
–Valve, sleeve and plug slide along valve bore under their own weight.
–Valve, sleeve and plug are free from burrs, dents and scratches.
–Control valve springs are free from damage, deformation and fatigue.
–Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 4.
NG >> Repair control valve assembly.
4. CHECK DTC
Perform AT- 1 4 1 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Check control valve again. Repair or replace control valve assembly.
Solenoid valve Connector Terminal Resistance (Approx.)
Shift solenoid valve B F43 1 - Ground 5 - 20Ω
SCIA5601E
SCIA2058E
Page 153 of 3502

A/T 3RD GEAR FUNCTION
AT-145
D
E
F
G
H
I
J
K
L
MA
B
AT
Diagnostic ProcedureBCS0013F
1. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve A
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 9 1 , "
Wiring Diagram —
AT — SSV/A" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace shift solenoid valve assembly.
2. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve A
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
91, "Wiring Diagram — AT — SSV/A" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace shift solenoid valve assembly.
3. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check to ensure that:
–Valve, sleeve and plug slide along valve bore under their own weight.
–Valve, sleeve and plug are free from burrs, dents and scratches.
–Control valve springs are free from damage, deformation and fatigue.
–Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 4.
NG >> Repair control valve assembly.
4. CHECK DTC
Perform AT- 1 4 4 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Check control valve again. Repair or replace control valve assembly.
Solenoid valve Connector Terminal Resistance (Approx.)
Shift solenoid valve A F43 2 - Ground 20 - 30Ω
SCIA2049E
SCIA2052E
Page 156 of 3502
AT-148
A/T 4TH GEAR FUNCTION
2. CHECK LINE PRESSURE
Perform line pressure test. Refer to AT- 4 6 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 7.
3. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve A
–Shift solenoid valve B
2. Check resistance between terminal cord assembly harness con-
nector terminals and ground. Refer to AT- 9 1 , "
Wiring Diagram —
AT — SSV/A" and AT- 9 6 , "Wiring Diagram — AT — SSV/B" .
OK or NG
OK >> GO TO 4.
NG >> Replace solenoid valve assembly.
Solenoid valve Connector TerminalResistance
(Approx.)
Shift solenoid valve A
F432 - Ground 20 - 30Ω
Shift solenoid valve B 1 - Ground 5 - 20Ω
SCIA3594E
Page 157 of 3502

A/T 4TH GEAR FUNCTION
AT-149
D
E
F
G
H
I
J
K
L
MA
B
AT
4. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Shift solenoid valve A
–Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminals and ground. Refer to
AT- 9 1 , "
Wiring Diagram — AT — SSV/A" and AT- 9 6 , "Wiring
Diagram — AT — SSV/B" .
OK or NG
OK >> GO TO 5.
NG >> Replace solenoid valve assembly.
5. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check to ensure that:
–Valve, sleeve and plug slide along valve bore under their own weight.
–Valve, sleeve and plug are free from burrs, dents and scratches.
–Control valve springs are free from damage, deformation and fatigue.
–Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 6.
NG >> Repair control valve.
6. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> Check control valve again. Repair or replace control valve assembly.
SCIA3595E
Page 158 of 3502

AT-150
A/T 4TH GEAR FUNCTION
7. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 1 2 7 , "
Wiring Diagram
— AT — LPSV" .
OK or NG
OK >> GO TO 8.
NG >> Replace solenoid valve assembly.
8. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
127, "Wiring Diagram — AT — LPSV" .
OK or NG
OK >> GO TO 9.
NG >> Replace solenoid valve assembly.
9. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check line pressure circuit valves for sticking.
–Pilot valve
–Shift solenoid valve A
–Shift solenoid valve B
OK or NG
OK >> GO TO 10.
NG >> Repair or replace control valve.
10. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> Check control valve again. Repair or replace control valve assembly.
11 . CHECK DTC
Perform AT- 1 4 7 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Perform AT- 5 0 , "
Cruise Test — Part 1" again and return to the start point of this test group.
Solenoid valve Connector TerminalResistance
(Approx.)
Line pressure solenoid valve F43 4 - Ground 2.5 - 5Ω
SCIA4951E
SCIA3275E
Page 161 of 3502

A/T TCC S/V FUNCTION (LOCK-UP)
AT-153
D
E
F
G
H
I
J
K
L
MA
B
AT
3. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check to ensure that:
–Valve, sleeve and plug slide along valve bore under their own weight.
–Valve, sleeve and plug are free from burrs, dents and scratches.
–Control valve springs are free from damage, deformation and fatigue.
–Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace control valve.
4. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 5.
NO >> Check control valve again. Repair or replace control valve assembly.
5. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
6. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 1 2 7 , "
Wiring Diagram
— AT — LPSV" .
OK or NG
OK >> GO TO 7.
NG >> Replace solenoid valve assembly.
7. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
127, "Wiring Diagram — AT — LPSV" .
OK or NG
OK >> GO TO 8.
NG >> Replace solenoid valve assembly.
Solenoid valve Connector TerminalResistance
(Approx.)
Line pressure solenoid valve F43 4 - Ground 2.5 - 5Ω
SCIA4951E
SCIA3275E
Page 162 of 3502

AT-154
A/T TCC S/V FUNCTION (LOCK-UP)
8. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check line pressure circuit valves for sticking.
–Pressure regulator valve
–Pilot valve
–Pressure modifier valve
OK or NG
OK >> GO TO 9.
NG >> Repair or replace control valve.
9. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 10.
NO >> Check control valve again. Repair or replace control valve assembly.
10. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 . CHECK LOCK-UP
During AT- 5 0 , "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> Perform AT- 5 0 , "Cruise Test — Part 1" again and return to the start point of this test group.
NO >> GO TO 12.
12. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 1 0 6 , "
Wiring Diagram
— AT — TCV" .
OK or NG
OK >> GO TO 13.
NG >> Replace solenoid valve assembly.
Solenoid valve Connector TerminalResistance
(Approx.)
Torque converter clutch solenoid valve F43 5 - Ground 5 - 20Ω
SCIA2063E
Page 163 of 3502

A/T TCC S/V FUNCTION (LOCK-UP)
AT-155
D
E
F
G
H
I
J
K
L
MA
B
AT
13. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
106, "Wiring Diagram — AT — TCV" .
OK or NG
OK >> GO TO 14.
NG >> Replace solenoid valve assembly.
14. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check control valves for sticking.
–Torque converter clutch control valve
–Torque converter clutch relief valve
OK or NG
OK >> GO TO 15.
NG >> Repair or replace control valve.
15. CHECK LOCK-UP
During AT- 5 0 , "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> GO TO 16.
NO >> Check control valve again. Repair or replace control valve assembly.
16. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Perform AT- 5 0 , "
Cruise Test — Part 1" again and return to the start point of this test group.
SCIA2066E