Suzuki XL7 2007 Service Manual page 1544

5A-134 Automatic Transmission:
Circuit/System Verification
1. Ignition ON, observe the DTC information with a
scan tool.
2. Record Freeze Frame and Failure Records.
3. Clear DTCs.
4. Operate the vehicle under the conditions observed in
the Failure Records.
5. Observe the DTC information with the scan tool.
Verify that the DTC does not set.
Circuit/System Testing
1. Operate the vehicle in D.
2. Using the scan tool record the gear ratio while
accelerating in 4th gear. The gear ratio should be
within 1.04:1-1.56:1.
➢ If the 4th gear ratio is 1.00:1, inspect and repair the
control valve body assembly for the following
conditions. Refer to "Control Valve Body Assembly
Disassemble".
– Stuck 2-3, 3-4 shift solenoid valve assembly
– Stuck M2 shift valve
If the conditions test normal, replace the control
valve body assembly, Refer to "Control Valve
Body Replacement" procedure.
➢ If the 4th gear ratio is not within the specified range
and is not 1.00:1, continue to step 3.
3. Observe the scan tool Transmission OSS parameter
while driving the vehicle. The reading should
correspond to a known properly functioning OSS.
➢ If the OSS is malfunctioning, replace the
Transmission Output Speed Sensor (OSS). refer to
the "Output Speed Sensor Replacement"
procedure.
4. Stop the vehicle, apply the parking brake, engine at
idle, select P (park) using the Shift Control.
5. Observe the scan tool Transmission ISS parameter.
The reading should be within 400-800 RPM.
➢ If the ISS parameter is not within the specified
range, replace the Transmission Input Speed
Sensor (ISS). Refer to the "Input Speed Sensor
Replacement" procedure.
6. Ignition ON, engine OFF, command shift solenoid 1
ON and OFF with a scan tool. The solenoid should
click when commanded ON.
➢ If the solenoid does not click, replace the 1st shift
solenoid valve assembly. Refer to "Control Valve
Body Assembly Disassemble".
7. Command shift solenoid 3 ON and OFF with a scan
tool. The solenoid should click when commanded
ON.
➢ If the solenoid does not click, replace the 1-2, 2-3,
reverse shift solenoid valve assembly. Refer to
"Control Valve Body Assembly Disassemble".
8. Perform a line pressure test. Refer to "Line Pressure
Check" procedure.
9. Remove the control valve body cover. Refer to
"Control Valve Body Cover Removal" procedure.
10. Inspect the inside of the control valve body cover for
excessive sediment. There should not be excessive
sediment.
➢ If excessive sediment is found inspect and replace
as necessary the direct clutch, 4-5 clutch, and
forward clutch. Refer to "1-2-Reverse Carrier Gear
Assembly Installation", "4-5 Clutch Drum Assembly
Assemble", and "Forward and Direct Clutch
Assembly Assemble" procedures.
11. Inspect the control valve body assembly for the
following conditions. Refer to "Control Valve Rear
Body Disassemble" and "Middle Control Valve Body
Disassemble". The conditions should not be found.
– Stuck U1 shift valve
– Stuck M1 shift valve
– Stuck U2 shift valve
– Stuck shift pressure relay valve
– Stuck neutral relay valve
– Stuck line pressure control solenoid valve
assembly
➢ If any of the above conditions are found, replace
the valve body assembly. Refer to "Control Valve
Body Replacement" procedure.
12. Verify that the control valve body has been serviced
within the past 3 months.
➢ If the control valve body has not been serviced,
replace the control valve body assembly. Refer to
"Control Valve Body Replacement" procedure.
13. If all circuits and components test normal, replace
the transmission.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.