Inspection Of Overdrive Control Components - Toyota HILUX 1993 Repair Manual

AT–18
AUTOMATIC TRANSMISSION
INSPECTION OF OVERDRIVE CONTROL
COMPONENTS
1. INSPECT OVERDRIVE RELAY
(a) Remove the overdrive relay from the pedal bracket.
(b) Using an ohmmeter, check that there is continuity
between terminals 1 and 2.
(c) Apply battery positive voltage to the relay terminals
(d) Apply battery positive voltage to the relay terminals
(e) Install the overdrive relay to the pedal bracket.
2. INSPECT OVERDRIVE SOLENOID
(a) Using an ohmmeter, measure the resistance be–
Resistance: 11–15 9
(b) Apply battery positive voltage to the solenoid.
3. CHECK SOLENOID SEALS
If there is foreign material in the solenoid valve, there wil
be no fluid control even with solenoid operation
(a) Check that the solenoid valve does not leak when
(b) When supplying battery positive voltage to the sole–
– Troubleshooting (Overdrive Control System)
2 and 3. Using an ohmmeter, check that there is no
continuity between terminals 1 and 2.
2 and 4. Using an ohmmeter, check that there is no
continuity between terminals 1 and 2.
tween terminal 1 and body.
Check that the solenoid operation sound is heard.
low–pressure compressed air is applied.
noid, check that the solenoid valve opens.