Suzuki XL7 2007 Service Manual page 1590

5A-180 Automatic Transmission:
No 3-2 Downshift
Checks
DEFINITION: No third gear to second gear downshift
External Automatic Transmission Control Valve Body Assembly (39)
• 2--3, 3-4 Shift Solenoid Valve
Assembly (S2) (308)
• 1-2, 2-3, Reverse Shift Solenoid
Valve Assembly (S3) (300)
• 3-4, 4-5 Shift Solenoid Valve
Assembly (S4) (303)
• Line Pressure Control Solenoid
Valve Assembly (SLT) (316)
Internal Automatic Transmission Control Valve Body Assembly (39)
• M1 Shift Valve (389)
• M2 Shift Valve (426)
• U1 Shift Valve (386)
• U2 Shift Valve (392)
Clutch - Mechanical/Hydraulic
1-2 Reverse Clutch Assembly (19) Remove the automatic transmission case cover and 1-2 reverse clutch
No 2-1 Downshift
Checks
DEFINITION: No second gear to first gear downshift
External Automatic Transmission Control Valve Body Assembly (39)
• Reverse, 1st Shift Solenoid Valve
Assembly (S1) (310)
• 2--3, 3-4 Shift Solenoid Valve
Assembly (S2) (308)
• 1-2, 2-3, Reverse Shift Solenoid
Valve Assembly (S3) (300)
• 3-4, 4-5 Shift Solenoid Valve
Assembly (S4) (303)
Internal Automatic Transmission Control Valve Body Assembly (39)
• M1 Shift Valve (389)
• M2 Shift Valve (426)
• U1 Shift Valve (386)
• U2 Shift Valve (392)
Clutch - Mechanical/Hydraulic
Front Internal Gear and Low Clutch
Sprag Assembly (25)
Verify that all solenoids respond electrically. If there is no response, perform an
electrical diagnosis. If there are no electrical concerns, remove the solenoid
valve assemblies as needed, and inspect the solenoid O-ring seals, and the
solenoid bores for signs of damage and/or missing seals. If the solenoid valves
responded electrically and there are no bore or seal concerns, replace the
solenoid valve assemblies as necessary due to possible internal mechanical
concerns and retest. If a condition is still present after replacing the solenoid
valve assembly, replace the complete automatic transmission control valve
body assembly (39).
Remove the automatic transmission control valve body assembly (39) and
inspect the items listed. Inspect the internal bores and the valves for signs of
wear and/or damage, including internal contamination. If unable to verify any
repairable concerns, replace the complete automatic transmission control valve
body assembly (39).
assembly (19). Inspect all 1-2 reverse clutch components for proper operation.
Repair or replace as necessary.
Verify that all solenoids respond electrically. If there is no response, perform an
electrical diagnosis. If there are no electrical concerns, remove the solenoid
valve assemblies as needed, and inspect the solenoid O-ring seals, and the
solenoid bores for signs of damage and/or missing seals. If the solenoid valves
responded electrically and there are no bore or seal concerns, replace the
solenoid valve assemblies as necessary due to possible internal mechanical
concerns and retest. If a condition is still present after replacing the solenoid
valve assembly, replace the complete automatic transmission control valve
body assembly (39).
Remove the automatic transmission control valve body assembly (39) and
inspect the items listed. Inspect the internal bores and the valves for signs of
wear and/or damage, including internal contamination. If unable to verify any
repairable concerns, replace the complete automatic transmission control valve
body assembly (39).
Remove the automatic transmission case cover and 1-2 reverse clutch
assembly (19), the forward and direct clutch assembly (23), and the front carrier
sun gear assembly (24) to gain access to the front internal gear and low clutch
sprag assembly (25). Disassemble the front internal gear and low clutch sprag
assembly (25) in order to inspect and clean. Repair or replace components as
necessary to correct the condition.
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