Toyota Corolla Repair Manual: Inspection procedure
1 Check fuse(ecu–ig)
- Remove the ecu–ig fuse from the instrument panel j/b.
- check the continuity of the ecu–ig fuse.
Ok: continuity
2 Inspect terminal voltage(b)
- Remove the cruise control ecu assy with connector still connected.
- turn the ignition switch to on.
- measure voltage between terminals 2 (b) and 16 (gnd)
of the cruise control ecu assy connector.
Ok: voltage: 10 – 16 v
3 Check harness and connector(between cruise control ecu assy and body ground)
- Measure resistance between terminal 16 (gnd) of the
cruise control ecu assy connector and body ground.
Ok: resistance: below 1 Ω
Check and repair harness and connector between cruise control ecu assy and battery
Circuit description
The cruise control ecu assy power source supplies power to the actuator and
sensors, etc., When terminal
gnd and the case of the cruise control ecu assy are grounded.
Wiring diagram
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Other materials:
Setting speed dials
1 Select “Add SD” using . 2 Select
the desired data using .
3 Press and hold the desired preset button (from
to
).
For details about setting speed dials from the call history: For details about
deleting speed dials: ...
How to proceed with troubleshooting
1 Vehicle brought to workshop
2 Customer problem analysis
3 Problem symptom confirmation
4 Circuit inspection
5 Repair or replace
6 Confirmation test
7 End
Customer problem analysis check
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Circuit description
The airbag front rh sensor circuit consists of the airbag sensor assy center
and airbag front rh sensor.
Dtc b1156/b1157/15 is recorded when a malfunction is detected in the airbag
front rh sensor circuit.
Wiring diagram
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