Suzuki WagonR+ RB310 Service Manual page 2162

DTC C1122 ENGINE SPEED SIGNAL CIRCUIT FAIL
1. Main fuse box
2. "EPS" fuse (30 A)
3. Ignition switch
4. Circuit fuse box
5. "IG coil" fuse (15A)
STEP
1 Was "SYSTEM CHECK FLOW TABLE"
performed?
2 1) Recheck DTC with engine running.
Is DTC C1122 indicated?
3 1) Check proper connection to P/S control
module and ECM/PCM at each "Br/Y" wire
terminal (P/S control module side: "A5"
terminal, ECM/PCM side: Refer to "WIRING
DIAGRAM" in SECTION 6E), then check
intermittent trouble referring to
"INTERMITTENT TROUBLE" in SECTION 0A.
Is check result in good condition?
4 1) See NOTE 1 describe below.
2) Using SUZUKI scan tool, read data list for P/S
system referring to "SUZUKI SCAN TOOL
OPERATOR'S MANUAL".
3) Check engine speed.
Is proper engine speed indicated?
NOTE 1:
It is necessary for SUZUKI scan tool to perform STEP 4 of this table.
ELECTRICAL POWER STEERING (EPS) SYSTEM (IF EQUIPPED) 3B1-21
6. ECM / PCM
7. P / S control module
8. P / S control module
body ground
9. Connector "A"
ACTION
9
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a
known-good P/S
control module and
recheck.
NO
Go to "SYSTEM
CHECK FLOW
TABLE" in this section.
It is nothing abnormal
for DTC C1122.
System is in normal
condition.
Repair poor
connection or
intermittent trouble.
Repair high resistance,
open or short to power
circuit or ground in
"Br/Y" wire circuit.
If OK, check engine
speed signal of ECM/
PCM.