Suzuki XL7 2007 Service Manual page 1546

5A-136 Automatic Transmission:
Circuit/System Testing
1. Operate the vehicle in 2nd gear. The engine should
not stall when shifting into 2nd gear.
➢ Inspect and repair as necessary, the control valve
body assembly for a stuck 3-4, 4-5 solenoid valve
or a stuck U1 shift valve. Refer to the "Control Valve
Body Assembly Disassemble" procedure.
2. 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.
3. Stop the vehicle, apply the parking brake, engine at
idle, select P (park) using the Shift Control.
4. 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.
5. Perform a line pressure test. refer to "Line Pressure
Check".
6. Remove the control valve body cover. Refer to
"Control Valve Body Cover Removal" procedure.
7. 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, Low and reverse
clutch, and 1-2, reverse clutch. Refer to "Forward
and Direct Clutch Assembly Assemble", "Front
Internal Gear and Low and Reverse Clutch
Installation", and "1-2 Reverse Clutch Assemble"
procedures.
8. 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 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.
9. 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.
10. 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.
DTC P0741
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle
Diagnostic Information: " prior to using this diagnostic
procedure.
• Review "Strategy Based Diagnosis: " for an overview
of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle
Diagnostic Information: " provides an overview of
each diagnostic category.
DTC Descriptor
DTC P0741: Torque Converter Clutch (TCC) System -
Stuck Off
Circuit/System Description
The transmission control module (TCM) controls the
torque converter clutch (TCC) lock up pressure control
solenoid valve. The solenoid directs the hydraulic fluid
for TCC apply and release. When the TCC is released,
the engine is coupled by fluid to the transmission.
Conditions for Running the DTC
• No Throttle Position (TP) Sensor DTC P0120
• No Transmission Range (TR) Switch DTC's P0706,
P0707, or P0708
• No Transmission Fluid Temperature (TFT) Sensor
DTC's P0711, P0712, or P0713
• No Speed Sensor DTC's P0717, P0722, P0727
• No Pressure Control (PC) Solenoid DTC's P0962,
P0963, P0966, P0967, P0970, or P0971
• No Shift Solenoid (SS) Control Circuit DTC's P0973,
P0974, P0976, P0977, P0979, P0980, P0982, P0983,
P0985, or P0986
• No Transmission Torque Delivered Circuit DTC P2637
• No Communications DTC's U0100 or U2104
• Engine speed is greater than 400 RPM
• Input Speed is less than 3000 RPM
• Range equals D, M, or L for 8 seconds
• Transmission oil temperature is greater than 20°C
• Engine torque is 46 - 240 N⋅m
• The ignition voltage is greater than 10.5 volts