Components

Removal
Caution:
Be sure to read the precautionary notices concerning the srs airbag system before servicing it (see page rs-1).
Caution:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

Inspection

Standard resistance 
If the result is not as specified, replace the switch assembly.
Tc and cg terminal circuit
Description
Connecting terminals tc and cg of the dlc3 enables dtcs to be read through blinking patterns of the combination meter's cruise main indicator light.
Hint:
When a warning light of the combination meter blinks continuously, terminal tc of the dlc3 or an ecm may have a ground short.
Wiring diagram

Inspection procedure

Standard resistance 
Replace ecm
Installation
Torque: 1.7 To 3.0 N*m (17.34 To 30.60 Kgf*cm, 15.04 To 26.55 In.*Lbf)

Cruise control switch circuit
DifferentialOxygen sensor circuit
Description
In order to obtain a high purification rate of the carbon monoxide (co),
hydrocarbon (hc) and nitrogen
oxide (nox) components in the exhaust gas, a twc is used. For the most efficient
use of the twc, the
air-fuel ratio must be precisely controlled so that it is always close to ...
Check mode procedure
Panel diagnosis (indicator check)
Turn the ignition switch to lock.
Turn the ignition switch on while simultaneously
pressing the a/c control auto switch and the rec/
frs switch.
Check that all indicators and the display area are
turned on and off 4 times in succession at 1 second ...
Checking the coolant
The coolant level is satisfactory
if it is between the "FULL" and
"LOW" lines on the reservoir
when the engine is cold.
Reservoir cap
"FULL" line
"LOW" line
If the level is on or below the "LOW" line, add coolant up to the "FULL"
line.
â– Coolant selection
Only use "Toyota Super Long Life
Cool ...