Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check all connectors(and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
 | ▶ Repair or replace as necessary and then, Go to "Verification of Vehicle Repair" procedue. ▶ In case SPAS ECU is replaced, Refer to "Component Inspection" procedure in DTC 1702 and perform SPAS Variant coding in the "Vehicle S/W Management" with GDS. |
 | ▶ Go to "CAN communication Inspection" procedure. |
Install all the control unit (Module)
Ignition "ON" & Engine "OFF"
Measure signal waveform between C-CAN-HIGH connector (Pin No.22) of SPAS ECU and chassis ground.
Measure signal waveform between C-CAN-LOW connector (Pin No.23) of SPAS ECU and chassis ground.
Specification : Refer to Signal waveform
Fig.1) CAN communication waveform
Is the measured value within specifications?
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage in the SPAS ECU and MDPS. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. ▶ Substitute with a known-good Sample of MDPS and check for proper operation. If problem is corrected, replace MDPS and then go to "Verification of Vehicle Repair" procedure. |
| ▶ If the measured value is battery voltage, check that it is short to battery in the circuit. Then, go to "Verification of Vehicle Repair" procedure. And then, go to "Verification of Vehicle Repair" procedure. In case that Communication is in sleep mode, 12V will be measured. Therefore, check that communication is in Wake up status. ▶ If the measured value is approx. "0V", check that it is short to ground, open or short in CAN High & Low. Then, go to "Verification of Vehicle Repair" procedure. |
