6C-41 Power Assisted Steering System:
DTC “C1122”: Engine Speed Signal Circuit Malfunction (LT-A750XP/ZK9)
B931G46304013
Troubleshooting
NOTE
Start the engine after repairing the DTC and check that the indicator light is turned OFF. Refer to
“Precautions in Diagnosing Troubles (LT-A750XP/ZK9) (Page 6C-1)”.
Possible Cause
• Faulty engine speed signal circuit.
• Faulty ECM.
• Faulty EPS control unit.
Step Action Yes No
1 1) Setup the SDS tool (Refer to the SDS operation manual
for further details.) or connect the mode select switch.
2) Click “Engine” and check the DTC code.
Is not DTC “C12 (P0335)” displayed?
Go to step 2. Inspect the CKP sensor.
Refer to “DTC “C12”
(P0335): CKP Sensor
Circuit Malfunction in
Section 1A in related
manual”.
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