K–72
ON-BOARD DIAGNOSTIC
Diagnostic procedure
POSSIBLE
CAUSE
• ATF level low
• Deteriorated ATF
• Shift solenoids A, B or C stuck
• Pressure control solenoid stuck
• Line pressure low
• 2-4 brake band slipping
• Forward clutch slipping
• Control valve stuck
• Oil pump
• PCM malfunction
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to available repair
information.
No Go to next step.
2 CHECK ATF CONDITION
• Check ATF condition.
(See K–12 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION.)
• Is it okay?
Yes Go to next step.
No Replace ATF, then go to Step 8.
3 CHECK ATF LEVEL
• Start engine.
• Warm up ATX.
• Is ATF level within specification?
(See K–12 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION.)
Yes Go to next step.
No Adjust ATF level, then go to Step 8.
4 INSPECTION SHIFT SOLENOID VALVE A, B
AND C FOR CLICK SOUND
• Perform inspection of operation. (See K–26
SOLENOID VALVE INSPECTION.)
• Verify the click sound of shift solenoid A, B, and
C when applying B+ to each transaxle
connector terminal.
• Was click heard from solenoids?
Yes Go to next step.
No Replace solenoid that you could not hear click sound, then
go to Step 8.
(See K–28 SOLENOID VALVE REMOVAL/
INSTALLATION.)
5 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressures.
Specification
Idle: 330—470 kPa {3.4—4.7 kgf/cm
2
, 49—66
psi}
Stall: 1,160—1,320 kPa {11.9—13.4 kgf/cm
2
,
170—190 psi}
• Is line pressure within specification?
(See K–6 Line Pressure Test.)
Yes Go to next step.
No All ranges: Replace oil pump, then go to Step 8.
Any ranges: Replace control valve body, then go to Step 8.
(See K–34 CONTROL VALVE BODY REMOVAL, K–35
CONTROL VALVE BODY INSTALLATION.)
6 INSPECT STALL SPEED
• Measure stall speed in D range.
(See K–7 Stall Test.)
Specification
2,000—2,600 rpm
• Is stall speed within specification?
Yes Go to next step.
No Replace automatic transaxle, then go to Step8.
(See K–29 AUTOMATIC TRANSAXLE REMOVAL/
INSTALLATION.)
7 INSPECT FREQUENCY OF INPUT/TURBINE
SPEED SENSOR WHEN DRIVING VEHICLE
• Turn ignition key to OFF.
• Connect WDS or equivalent.
• Start engine.
• Measure frequency of input/turbine speed
sensor while driving vehicle under the following
conditions:
— Vehicle speed: 40 km/h {24 mph} (VSS
PID)
— Drive in D range, 2nd gear
— Throttle opening angle: about 25% (TP PID)
• Was frequency of input/turbine speed sensor at
approx. 1,156 Hz?
Yes Go to next step.
No Replace control valve body, then go to next step.
(See K–34 CONTROL VALVE BODY REMOVAL, K–35
CONTROL VALVE BODY INSTALLATION.)
DTC P0732 Gear 2 incorrect (Incorrect Gear Ratio Detected)
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