Toyota Corolla Cross: Supply Voltage Circuit Circuit Voltage Above Threshold (C123A17)
DESCRIPTION
The power steering ECU assembly distinguishes the ignition switch status as ON or off through the IG power source circuit.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
|---|---|---|---|---|
|
C123A17 |
Supply Voltage Circuit Circuit Voltage Above Threshold |
IG voltage is 18.5 V or more |
|
EPS warning light: Comes on |
*: for HEV Model
WIRING DIAGRAM
for Gasoline Model
for HEV Model
CAUTION / NOTICE / HINT
NOTICE:
- When the power steering ECU assembly has been replaced, perform Power Steering
ECU Initial Setting (assist map writing).
Click here
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- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (IG POWER SOURCE) |
(a) Disconnect the I21 power steering ECU assembly connectors.
(to Power Steering ECU Assembly)
|
*a |
Front view of wire harness connector (to Power Steering ECU Assembly) |
- |
- |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I21-1 (IG) - Body ground |
Ignition switch ON |
8 to 16 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I42-2 (PGND) - Body ground |
Always |
Below 1 Ω |
| OK | .gif) |
REPLACE POWER STEERING ECU ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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