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DI-196
DIAGNOSTICS - AUTOMATIC TRANSAXLE
DI6UE-02
O/D Main Switch & O/D OFF Indicator Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch is a momentary type switch. When pressing the O/D main switch, the O/D OFF indicator
light lights up and ECM prohibits shifting to O/D, and when pressing it again, the O/D OFF indicator light goes
off and ECM allows shifting to O/D. Turning the IG switch OFF will reset the O/D OFF indicator light.
WIRING DIAGRAM
ECM
C14
O/D OFF
Instrument Panel J/B Indicator Light
(Combination Meter)
4 GAUGE 13 13 4
R-B G-O G-O
1O 1G IE2 E5 ODLP
2 3
B-Y
Ignition Switch O/D Main Switch
14 12
G-O G-O
IE2 E5 ODMS
2 1 4 2
IG1 AM1
W-L
W-B
8 1O 13 1P
2 Instrument
AM1 Panel J/B
1
1 1C 2 1O *1: Ex. Puerto Rico
*1 *2 *2:
B-G Puerto Rico
B
4
Fuiseble
ALT W-B
Link Block
ID
Battery
D07918
2002 ECHO (RM884U)
Author : Date : 366
DI-197
DIAGNOSTICS - AUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
1 Check operation of O/D main switch
PREPARATION:
Turn the ignition switch ON.
CHECK:
(a) Check O/D OFF indicator light when O/D main switch is
pushed in to ON.
(b) Check O/D OFF indicator light when O/D main switch is
pushed again.
OK:
(a) O/D OFF indicator light lights up.
(b) O/D OFF indicator light goes off.
OK Proceed to next inspection shown on problem
symptoms tables (See page DI-163 ).
NG
2 Check and replace the combination meter (See page BE-2 ).
NG Replace the combination meter.
OK
3 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
Check continuity between terminals 2 and 4 of O/D main switch
connector.
OK:
O/D main switch condition Specified condition
Press continuously O/D main switch Continuity
Q08233
Release O/D main switch No continuity
NG Replace and repair O/D main switch.
OK
2002 ECHO (RM884U)
Author : Date : 367
DI-198
DIAGNOSTICS - AUTOMATIC TRANSAXLE
4 Check voltage between terminal ODMS of ECM and body ground.
ON PREPARATION:
Turn the ignition switch ON.
CHECK:
Check voltage between terminal ODMS of ECM and body
ground when O/D main switch is ON and OFF.
OK:
O/D main switch Specified voltage
ODMS Press continuously O/D main switch Below 1.0 V
D08011
Release O/D main switch 10 - 14 V
OK Check and replace the ECM (See page IN-29 ).
NG
5 Check voltage between terminal ODLP of ECM and body ground.
ON
PREPARATION:
ODLP
(a) Disconnect the connector of ECM.
(b) Turn the ignition switch ON.
CHECK:
Check voltage between terminal ODLP of ECM and body
ground.
(-) (+)
OK:
Voltage: 7.5 - 14 V
D05647
OK Check and replace the ECM (See page IN-29 ).
NG
Check and replace harness and connector between combination meter and ECM, O/D main
switch and ECM, O/D main switch and body ground (See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 368
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