Mitsubishi Lancer Evolution IX. Manual — part 616
TROUBLESHOOTING <ACD>
MANUAL TRANSMISSION (FF)
22A-147
31
ECU backup
power supply
Any time
System voltage
32
Pressure sensor Ignition switch: ON
0.5
− 1.5 V
33
Steering wheel
sensor <ST-1>
Ignition switch: ON
Steering wheel: Turn
slowly
1
− 2 V ⇔ 2.5 − 4.5 V
flushing
34
Steering wheel
sensor <ST-2>
Ignition switch: ON
Steering wheel: Turn
slowly
1
− 2 V ⇔ 2.5 − 4.5 V
flushing
36
Idle switch
Ignition switch: ON
Accelerator pedal: Full
closed
1 V or less
Accelerator pedal:
Depress
4.5
− 5.0 V
37
Parking brake
switch
Ignition switch: ON
Parking brake lever: Pull 1 V or less
Parking brake lever:
Release
System voltage
38
Stop lamp switch Ignition switch: ON
Brake pedal: Depress
System voltage
Brake pedal: Release
1 V or less
39
TPS
Ignition switch: ON
Accelerator pedal: Full
closed
0.5
− 0.7 V
Accelerator pedal: Full
throttle
4.5
− 5.5 V
40
ACD mode
indicator lamp
<TARMAC>
Ignition switch: ON
ACD mode indicator lamp
position: TARMAC
0 V
ACD mode indicator lamp
position: Except for
above
Approx.10.5 V
42
ECU earth
Any time
1 V or less
43
Pressure sensor
power supply
Ignition switch: OFF
1 V or less
Ignition switch: ON
Approx.5.0 V
44
Steering wheel
sensor <ST-N>
Ignition switch: ON
Steering wheel: Neutral
1
− 2 V
Steering wheel: Turn from
the neutral position
2.5
− 4.5 V
47
ACD mode
switch
Ignition switch: ON
Switch: Press
System voltage
Switch: Release
0 V
48
ABS monitor
With ABS not active
System voltage
With ABS active
1.5 V or less
51
ACD mode
indicator lamp
<SNOW>
Ignition switch: ON
ACD mode indicator lamp
position: SNOW
0 V
ACD mode indicator lamp
position: Except for
above
Approx.10.5 V
Terminal
No.
Check item
Check condition
Normal state
TROUBLESHOOTING <M/T>
MANUAL TRANSMISSION (FF)
22A-148
TROUBLESHOOTING <M/T>
INTRODUCTION
M1221006900701
The manual transmission can exhibit any of the fol-
lowing symptoms: noise or vibration is generated, oil
leaks, shifting gears is hard or troublesome, or the
transmission jumps out of gear.
The causes of these symptoms could come from:
incorrect mounting, the oil level may be low, or a
component of the transmission may be faulty.
TROUBLESHOOTING STRATEGY
M1221007000626
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
manual transmission fault.
1. Gather information from the customer.
2. Verify that the condition described by the
customer exists.
3. Find the malfunction by following the Symptom
Chart.
4. Verify malfunction is eliminated.
SYMPTOM CHART
M1221007100612
52
ACD mode
indicator lamp
<GRAVEL>
Ignition switch: ON
ACD mode indicator lamp
position: GRAVEL
0 V
ACD mode indicator lamp
position: Except for
above
Approx.10.5 V
Terminal
No.
Check item
Check condition
Normal state
Trouble symptom
Inspection
procedure No.
Reference page
Noise, vibration
1
Oil leaks
2
Hard shifting
3
Jumps out of gear
4
TROUBLESHOOTING <M/T>
MANUAL TRANSMISSION (FF)
22A-149
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Noise, vibration
DIAGNOSIS
STEP 1. Check the idle speed.
Q: Does the idle speed meet the standard values?
YES :
Go to Step 2.
NO :
Refer to GROUP 11A
− On-vehicle Service,
Idle Speed Check
.
STEP 2. Check whether the transmission and
engine mount is loose or damaged.
Q: Are the transmission and engine mount loose or
damaged?
YES :
Tighten or replace the part. Then go to Step
7.
NO :
Go to Step 3.
STEP 3. Check that the oil level is up to the lower
edge of the filler plug hole.
Q: Is the oil level up to the lower edge of the filler plug
hole?
YES :
Go to Step 4.
NO :
Refill DIA QUEEN SUPER MULTI GEAR
75W
−85W (GL−4) or exact equivalent. Then
go to Step 7.
STEP 4. Check for the specified oil.
Q: Is the specified oil DIA QUEEN SUPER MULTI
GEAR 75W
−85W (GL−4) or exact equivalent?
YES :
Go to Step 5.
NO :
If in doubt, replace the oil. Refer to
. Then go to Step 7.
STEP 5. Remove the transmission. Check the
axial play of the input and output shafts.
Q: Does the axial play of the input and output shafts
meet the standard value?
YES :
Go to Step 6.
NO :
Adjust the axial play of the input and output
shafts. Then go to Step 7.
STEP 6. Disassemble the transmission. Check
the gears for wear and damage.
Q: Are the gears worn or damaged?
YES :
Replace the gears. Go to Step 7.
NO :
Go to Step 7.
STEP 7. Retest the systems.
Q: Is the noise or vibration still there?
YES :
Return to Step 1.
NO :
The procedure is complete.
AC102278AO
Filler plug
Transmission oil
Filler plug hole
TROUBLESHOOTING <M/T>
MANUAL TRANSMISSION (FF)
22A-150
INSPECTION PROCEDURE 2: Oil leaks
DIAGNOSIS
STEP 1. Visual check.
Raise the vehicle, and check for oil leaks. If oil leak is
difficult to locate, steam clean the transmission and
drive the vehicle for at 10 minutes. Then check the
leak again.
Q: Is the oil leak(s) found?
YES :
Go to Step 2.
NO :
Check for the oil leaks around the engine.
Then go to Step 4.
STEP 2. Visual check at the clutch housing.
Q: Do oil leaks appear around the joint between the
engine and the clutch housing?
YES :
Remove the transmission. Check the input
shaft oil seal, and replace if necessary.
Then go to Step 4.
NO :
Go to Step 3.
STEP 3. Check the oil seal or O-ring for damage.
Q: Is the oil seal or O-ring damaged?
YES :
Replace the oil seal or the O-ring. Then go
to Step 4.
NO :
Go to Step 4.
STEP 4. Retest the system.
Q: Is the oil still leaking?
YES :
Return to Step 1.
NO :
The procedure is complete.
INSPECTION PROCEDURE 3: Hard shifting
DIAGNOSIS
STEP 1. Check the transmission control
Q: Are the shift cable and the select cable in good
condition?
YES :
Go to Step 2.
NO :
Repair or replace the shift cable and the
select cable. Refer to
. Then go
to Step 7.
STEP 2. Check the transmission oil.
Q: Is the oil dirty?
YES :
Replace the oil. Refer to
. Then
go to Step 7.
NO :
Go to Step 3.
STEP 3. Check the clutch system.
Q: Is the clutch system normal?
YES :
Go to Step 4.
NO :
Repair or replace the clutch system. Refer
to GROUP 21B
− Clutch
. Then go
to Step 7.
STEP 4. Remove and disassemble the
transmission. Check the control housing.
Q: Is the control housing in good condition?
YES :
Go to Step 5.
NO :
Repair or replace the control housing. Refer
to GROUP 22B
− Transmission
.
Then go to Step 7.
STEP 5. Check for poor meshing of worn
synchronizer ring and gear cone.
Q: Is poor meshing or worn synchronizer ring and
gear cone found?
YES :
Repair or replace the synchronizer ring and
gear cone. Then go to Step 7.
NO :
Go to Step 6.
STEP 6. Check the synchronizer spring for
weakness.
Q: Is the synchronizer spring weak?
YES :
Replace the synchronizer spring. Then go
to Step 7.
NO :
Go to Step 7.
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