Suzuki XL7 2007 Service Manual page 1588

5A-178 Automatic Transmission:
No 3-4 Upshift
Checks
DEFINITION: No third gear to fourth gear upshift
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)
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
3rd Gear Band Assembly (16)
No 4-5 Upshift
Checks
DEFINITION: No fourth gear to fifth gear upshift
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)
• Reverse Shift Solenoid Valve
Assembly (S5) (305)
Internal Automatic Transmission Control Valve Body Assembly (39)
• M1 Shift Valve (389)
• M2 Shift Valve (426)
• U1 Shift Valve (386)
• U2 Shift Valve (392)
• Shift Pressure Relay Valve (424)
Clutch - Mechanical/Hydraulic
Direct Clutch Assembly (554-563)
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), and the 1-2 reverse carrier gear assembly (18) in order to
inspect the 3rd gear brake band assembly (16). Inspect all related 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), and the forward and direct clutch assembly (23) in order to
inspect all direct clutch components and operation. Repair or replace as
necessary.
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