ACTIVE-ELECTRONIC CONTROL SUSPENSION Troubleshooting
Diagnostic
If there is damage or disconnection of the heavy-line
illuminates and ‘control is as described in the table
circuit, or a short-circuit, or a malfunction of the
p u t t r a n s i s t o r w i t h i n t h e E C U , t h e a l a r m l i g h t
below. (Note that the diagnostic is only applicable
up to the compressor relay.)
Diagnostic No.
Attitude control
Damping force
control
Vehicle-height
control
Switch acceptance
HIGH
S P O R T
AUTO
S O F T
44
Rolling control only
Held at
stops.
MEDIUM
Rolling control only
Not accept
Actuator compulsory activation
Applicable operation
of activation
06
Return pump relay ON
The return pump relay is compulsorily switched ON for a period of three seconds.
ECU terminal voltages (when connector is connected)
Terminal
voltage
3
2 Return pump relay activation
When the return pump relay is ON
When the return pump relay is OFF
o v
During fail-safe
o v
(solenoid valve power source relay switch OFF)
Checking the return pump drive circuit (with the connector disconnected)
Battery positive voltage
o r
measured part
Tester
Check
Standard
32
Return pump relay
Resistance
Constatly
Approx
Next apply battery voltage to
terminal 32.
Return pump
operation
NOTE (Refer to
GENERAL for the circuit diagram.)
Procedures for changing the internal pressure of the low-pressure tank
For 70
psi) or lower
Short-circuit the battery power-source
terminal to the return pump relay
terminal in order to activate the return
pump for a few seconds, and then leave as is.
For
(20 psi) or higher
Short-circuit
the
battery power-source
terminal to the front intake-air solenoid
terminal and the front right
solenoid
terminal in order to connect the high-pressure tank and low-pressure tank, and then leave as is for a few
seconds.
Procedures for changing the internal pressure of the high-pressure tank
For 760
(108 psi) or lower
Short-circuit the battery power-source
terminal to the discharge-air solenoid (for vehicle-height adjustment)
terminal, the front intake-air solenoid
terminal and the front right solenoid
terminal and the front discharge-air
solenoid
terminal in order to release the atmosphere inside the high-pressure tank, and then leave as is for a few
seconds.
For 950
(135 psi) or higher
Short-circuit the battery power-source
terminal to the compressor relay
terminal in order to activate the
compressor for a few seconds, and then leave as is.
Troubleshooting hints (mechanical malfunctions)
Malfunction
mode
Malfunction probable cause
Malfunction
Note
1
The return pump
The return pump relay contacts are shorted.
relay is fused
The return pump won’t stop, causing the
battery to discharge.
The return pump is
The return pump won’t operate due to short-
* Insufficient attitude-control effect.
stuck.
etc.
l
Vehicle height increases after rolling control.
TSB Revision
Summary of Contents for 1989 Galant
Page 2: ......
Page 4: ...00 z NOTES ...
Page 274: ...13 132 NOTE ...
Page 586: ...NOTES ...
Page 650: ...NOTE ...
Page 664: ...NOTES ...
Page 688: ...NOTES ...
Page 690: ......
Page 692: ......
Page 694: ......
Page 696: ......
Page 698: ......
Page 700: ...c ...
Page 702: ......
Page 704: ......
Page 706: ......
Page 708: ......
Page 710: ......
Page 712: ......
Page 714: ......
Page 716: ......
Page 718: ......
Page 720: ......
Page 722: ......
Page 724: ......
Page 729: ...23 23 NOTES ...
Page 860: ...NOTES ...
Page 921: ...NOTES ...
Page 948: ...33B 9 NOTES ...
Page 1121: ...NOTES ...
Page 1200: ...SERVICE BRAKES Brake Pedal 35 79 Lubrication points Part A 14AO256 1 14UOO5l TSB Revision ...
Page 1273: ...NOTES t ...