6C-25 Power Assisted Steering System:
DTC C1155: P/S Control Module Failure
S4RS0A6304022
Wiring Diagram
3
5
4
BLK GRN E49-1
[A]
[B]
2
4
4
GRN LT GRN/BLK E52-1
11 12 13 14 15 16 17 18 19 20
1
1 123 4 5 678 9 10
4
2
BLK E49-2
I4RS0B630010-
[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly
1. Main fuse 4. Fuse
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
Battery voltage is higher than upper limit voltage for P/S • Overcharged Battery
control module diagnosis or internal failure of controller
• P/S control module
(1 driving cycle detection logic)
DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check: ”.
2 Measure voltage between positive battery terminal and Substitute the original P/ Check charging system
vehicle body ground with engine running. S control module with a referring to “Generator
known-good P/S control Test (Overcharged
Is voltage 15.5 V or less?
module, and then Battery Check): in
recheck. Section 1J”.
Inspection of P/S Control Module and Its
Circuits
1
S4RS0A6304023 2
The P/S control module (1) and its circuits can be
checked at the P/S control module wiring couplers (2) by
measuring voltage and resistance.
CAUTION:
P/S control module cannot be checked by
itself. It is strictly prohibited to connect
voltmeter or ohmmeter to the P/S control
module with connectors disconnected from
the P/S control module.