AUTOMATIC TRANSMISSION –
Troubleshooting
23-11
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-
II
is not possible
Probable cause
If communication with the MUT-
II
is not possible, the cause is probably a defective
diagnosis line or the engine-A/T-ECU is not functioning.
D
Malfunction of diagnosis line
D
Malfunction of harness or connector
D
Malfunction of engine-A/T-ECU
NG
OK
OK
NG
NG
NO
Check the diagnosis line with MUT-
II
, and repair if necessary.
YES
NG
Repair
Replace the engine-A/T-ECU.
Check the trouble symptoms.
OK
NG
Repair
OK
NG
Repair
OK
NG
Repair
Harness check
D
Between diagnosis connector and engine-A/T-ECU
Check the following connectors:
B-18, B-32, B-38, B-93 <Vehicles without immobilizer>
B-18, B-24, B-32, B-93 <Vehicles with immobilizer>
Is communication with other systems possible using the
MUT-
II
?
Check the continuity and voltage of the engine-A/T-ECU connector.
D
Disconnect the connectors B-93, B-94 and check at harness
side.
D
Voltage between B-94 terminals Nos.41, 47 and earth
OK:
System voltage
D
Voltage between B-93 terminals Nos.76, 88, 97 and earth
OK:
Continuity
Check the following connectors:
A-10, B-13, B-93, B-94
Replace the engine-A/T-ECU.
Check the trouble symptoms.
Harness check
D
Between ignition switch and engine-A/T-ECU
D
Between earth and engine-A/T-ECU
INSPECTION PROCEDURE 16
Inhibitor switch system
Probable cause
The cause is probably a malfunction of the inhibitor switch circuit, ignition switch
circuit or a defective engine-A/T-ECU.
D
Malfunction of the inhibitor switch
D
Malfunction of the ignition switch
D
Malfunction of connector
D
Malfunction of the engine-A/T-ECU
*: Refer to ’96 COLT/LANCER Workshop Manual (Pub. No. PWME9511).
NG
NG
Replace
OK
NG
NG
Repair
OK
Ignition switch check (Refer to GROUP54 - Ignition Switch.)*
OK
Check the trouble symptoms.
Replace the engine-A/T-ECU.
NG
Repair
OK
NG
Repair
OK
NG
Repair
OK
NG
Check the trouble symptoms.
Inhibitor switch check (Refer to P.23-45.)*
Check the voltage of the inhibitor switch connector A-27.
D
Disconnect the connector and measure at the harness side.
D
Voltage between terminal No. 8 and earth
OK:
System voltage
Check the following connectors:
A-27, B-92
Harness check
D
Between inhibitor switch and engine-A/T-ECU connector
Check the following connectors:
A-27, B-33, B-70, B-75
Harness check
D
Between inhibitor switch and ignition switch