RM38T0EC
_55
Steering
_112287
POWER ASSIST SYSTEMS
_0510880
POWER STEERING SYSTEM
C
POWER ASSIST SYSTEMS POWER STEERING SYSTEM C123A17 Supply Voltage Circuit Circuit Voltage Above Threshold
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-IGR fuse* ·
IG power source circuit ·
Power steering ECU assembly |
EPS warning light: Comes on |
*: for HEV Model
WIRING DIAGRAM
for Gasoline Model
4.938,2.927 7.135,3.198
2.198,0.271
10
false
Power Steering ECU Assembly
5,0.823 5.438,1.125
0.438,0.302
10
false
I21
5,2.188 5.354,2.406
0.354,0.219
10
false
I42
5.031,0.604 5.24,0.833
0.208,0.229
10
false
1
5.375,0.823 5.813,1.125
0.438,0.302
10
false
IG
5.375,2.208 5.813,2.51
0.438,0.302
10
false
PGND
5.042,2 5.479,2.302
0.438,0.302
10
false
2
0.458,0.833 2.698,1.073
2.24,0.24
10
false
from Engine Stop and Start ECU
for HEV Model
5.438,2.823 6.76,3.24
1.323,0.417
10
false
Power Steering ECU Assembly
3.708,0.875 4.438,1.104
0.729,0.229
10
false
EPS-IGR
5.323,0.708 5.563,0.906
0.24,0.198
10
false
I21
5.323,1.896 5.677,2.115
0.354,0.219
10
false
I42
5.385,0.521 5.823,0.823
0.438,0.302
10
false
1
5.667,0.708 6.104,1.01
0.438,0.302
10
false
IG
5.656,1.896 6.094,2.083
0.438,0.188
10
false
PGND
5.385,1.708 5.823,2.01
0.438,0.302
10
false
2
1.427,0.719 2.99,1.104
1.563,0.385
10
false
from IGR NO. 2 Relay
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When the power steering ECU assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).
·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.
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
- Result:
Proceed to OK NG
OK
2.CHECK HARNESS AND CONNECTOR (IG POWER SOURCE)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
2.CHECK HARNESS AND CONNECTOR (IG POWER SOURCE)
a.
Disconnect the I42 power steering ECU assembly connectors.
b.
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
- Result:
Proceed to OK NG
OK
REPLACE POWER STEERING ECU ASSEMBLY
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR