1990 MITSUBISHI SPYDER fuses

GENERAL How to Use Service
HOW TO USE THE INSPECTION PROCEDURES.. ,
The causes of a high frequency of problems occurrin g in electronic circuitry are generally
components, the ECU and the harnesses between in that These
follow this order, and they first try to discover a problem with a connector or a
17
Check trouble
I
CautionAfter carrying out connector inspection, always be sure to the connector as it was before.
so check the harness. and check
HARNESS INSPECTION
Check for an open or short circuit in the harness b etween the terminals which were defective according
to the connector measurements. Carry out this inspe ction while referring to Volume 2 Electrical manual.
Here, “Check harness between power supply and termi nal xx” also includes checking for blown fuses.
For inspection service points when there is a blown fuse, refer to “Inspection Service Points for a Blown
Fuse”.
MEASURES TO TAKE AFTER REPLACING THE ECU
If the trouble symptoms have not disappeared even a fter replacing the ECU, repeat the inspection procedure
from the beginning.
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AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND ENGINE> Troubleshooting
INSPECTION PROCEDURES 12
l Some points (Early, late shifting points) P r o b a b l e c a u s e
[Comment]Some shift points occurs early, late while driving.
In such cases, the cause is probably al
Malfunction of valve body
defective valve body, or it is a phenomenon related control and is not an abnormality.
Refer to Automatic Transaxle Overhaul
Does fuzzy shifting occur normally? No problem because it is a phenomenon that appears due to
Nofactors associated with control.
YesDeviations at some shift points occurs only when the ATF is cold or less].
NoYes Deviations at some shift hot or more].
Valve body disassembly, cleaning and reassembly
Pay particular attention to loosening of bolts, and to damage,
If it is considered that the damage or chipping can not be
repaired, replace the valve body assembly.
INSPECTION PROCEDURE 13
lNo fail-safe codes (Does not shift)Probable cause
[Comment]l Malfunction of overdrive switch
Shifting does not occur while driving, and no fail- safe codes are output. In such cases, the l
cause is probably a defective overdrive switch or P ark/Neutral position switch.Malfunction of Park/ Neutral position switch
l Malfunction of power supply circuit
l Malfunction of TCM
No
Yes
Check to be sure that backup power is being supplie d to
the TCM.Does overdrive operate?
Yes
SCAN TOOL Data list
l 35 Overdrive switchCheck to be sure that power is being supplied to th e TCM
SCAN TOOL Data list
l 37 Park/ Neutral position switch
I OK: TCM input signal and selector lever position
should match.
Check the overdrive switch system according to insp ection
NGOK
, procedure (Refer to
Replace the TCM. ,
OK: When overdrive switch turns from OFF to ON,
scan tool display turns from OFF to ON.
Code No. 36, 37
Park/Neutral position switch system
(Refer to
Power circuit check
lPay particular attention to open circuits in the ha rness,defective connector connections and open circuits i nfuses.lIf there is an open circuit in a fuse, the cause of
the should be located and it should be
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