1996 SUBARU LEGACY Service Repair Manual

Page 2169 of 2890

SUBARU LEGACY 1996  Service Repair Manual F: TROUBLE CODE 21
—ATF TEMPERATURE SENSOR—
DIAGNOSIS:
Input signal circuit of TCM to ATF temperature sensor is
open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock
1. Check harness and connect

Page 2170 of 2890

SUBARU LEGACY 1996  Service Repair Manual OBD0388A
1. CHECK HARNESS AND CONNECTORS BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and transmission.
3) Measure resistance of harness co

Page 2171 of 2890

SUBARU LEGACY 1996  Service Repair Manual OBD0384A
3. CHECK INPUT SIGNAL FOR TCM.
1) Turn ignition switch ON (with engine OFF) and measure
signal voltage input of TCM.
2) Start and warm-up the engine. Measure signal voltage
input of TCM.
Conn

Page 2172 of 2890

SUBARU LEGACY 1996  Service Repair Manual G: TROUBLE CODE 22
—MASS AIR FLOW SIGNAL—
DIAGNOSIS:
Input signal circuit of TCM from ECM is open or shorted.
1. Check trouble code on engine side.
<Ref. to 2-7 On-Board Diagnostics II System
[T10

Page 2173 of 2890

SUBARU LEGACY 1996  Service Repair Manual B3M0476A
2. CHECK HARNESS CONNECTOR BETWEEN TCM
AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and ECM.
3) Measure resistance of harness connector between
TCM and ECM.
Conn

Page 2174 of 2890

SUBARU LEGACY 1996  Service Repair Manual H: TROUBLE CODE 23
—ENGINE SPEED SIGNAL—
DIAGNOSIS:
Engine speed input signal circuit is open or shorted.
TROUBLE SYMPTOM:
No lock-up (after engine warm-up)
AT OIL TEMP indicator remains on when

Page 2175 of 2890

SUBARU LEGACY 1996  Service Repair Manual B3M0477A
1. CHECK HARNESS AND CONNECTOR BETWEEN
TCM AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and ECM.
3) Measure resistance of harness connector between
TCM and ECM.

Page 2176 of 2890

SUBARU LEGACY 1996  Service Repair Manual I: TROUBLE CODE 24
—DUTY SOLENOID C—
DIAGNOSIS:
Output signal circuit of duty solenoid C is open or shorted.
TROUBLE SYMPTOM:
Excessive“braking”in tight corners
1. Check harness and connectors