Toyota Corolla Repair Manual: Shift solenoid ”a” control circuit low/high
Dtc p0973 shift solenoid ”a” control circuit low (shift solenoid valve s1)
Dtc p0974 shift solenoid ”a” control circuit high (shift solenoid valve s1)
Inspection procedure
1 Inspect shift solenoid valve(s2)
Remove the shift solenoid valve s2.
measure the resistance according to the value(s) in the
table below.
Standard:
Connect the positive (+ ...
Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the
shift solenoid valve s1 and s2
controlled by ecm. If an open or short circuit occurs in either of the solenoid
valves, ...
Other materials:
Overhaul
1. Remove w/head taper screw plug no.2
Using a socket hexagon wench 10, remove the taper
screw plug and gasket.
2. Remove valve lifter
Remove the valve lifters from the cylinder head.
3. Remove valve
Place the cylinder head on wooden blocks.
using sst, compres ...
Customer problem analysis
Hint:
in troubleshooting, the problem symptoms must be confirmed
accurately, meaning that all preconceptions
must be set aside in order to make an accurate judgement. To ascertain what
the problem symptoms
are, it is extremely important to ask the customer about the problem and
cond ...
Warning lights
Warning lights inform the driver of malfunctions in the indicated vehicle’s systems.
*1: Vehicles without a smart key system:
These lights turn on when the engine switch is turned to the “ON” position to indicate
that a system check is being performed. They will turn off after the engine is ...
