Suzuki XL7 2007 Service Manual page 1598

5A-188 Automatic Transmission:
Harsh Upshift
Checks
DEFINITION: Harsh upshifts
Customer Driving Habits
Fluid level low and/or contaminated,
or unit filled with the wrong type of
automatic transmission fluid (ATF)
Calibration
Adaptive learn function
Automatic Transmission Input
Speed Sensor Assembly (73)
Automatic Transmission Fluid
Temperature Sensor (36) - part of
the Automatic Transmission Wiring
Harness Assembly (33)
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)
• Reverse Shift Solenoid Valve
Assembly (S5) (305)
• Line Pressure Control Solenoid
Valve Assembly (SLT) (316)
• Shift Pressure Control Solenoid
Valve Assembly (SLS) (340)
• TCC Lock Up Pressure Control
Solenoid Valve Assembly (SLU)
(339)
Internal Automatic Transmission Control Valve Body Assembly (39)
Road test the vehicle in an attempt to duplicate the concern. If unable to
duplicate the concern, scan the system to verify that there is no other concern
present, perform a bulletin search, and verify the calibration level.
Inspect the ATF level and color. Perform "Transmission Fluid Check" and make
sure that the fluid does not smell burnt, and shows no sign of coolant cross-
contamination. If unable to determine if the transmission has the correct type of
fluid, drain the unit and refill with the correct ATF and retest.
Using a scan tool, verify that the current calibration level downloaded into the
transmission control module (TCM) is correct for this platform, including that the
correct TCM is being used for the platform. Refer to the appropriate service
information to verify that both engine and transmission calibrations are the most
current up-to-date level.
Perform adaptive learn procedure on the transmission in order for the TCM to
calibrate line pressure for accurate shifts.
Inspect the automatic transmission input speed sensor assembly (73) for loose
electrical connection and/or signs of physical damage that could cause erratic
output. The magnetic end of the sensor should be free of any metal shavings/
particles, including heavy friction material build-up. If metal or heavy friction
material is found, diagnose the cause and repair as necessary.
Using a scan tool, verify that the transmission fluid temperature is correct. If the
transmission fluid temperature is NOT correct, diagnose and correct 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).
Actions