Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P1564 ASCD steering switch
Diagnosis Procedure

1.CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT

  1. Turn ignition switch ON.
  2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
  3. Check each item indication as per the following conditions.    

Without CONSULT

  1. Turn ignition switch ON.
  2. Check the voltage between ECM harness connector terminals. 

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".

NO >> GO TO 2.

2.CHECK ASCD STEERING SWITCH GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect combination switch (spiral cable) harness connector.
  4. Check the continuity between combination switch (spiral cable) and ECM harness connector.
  5. Also check harness for short to ground and to power.

Is the inspection result normal?

YES >> GO TO 3.

NO >> Repair or replace error-detected parts.

3.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

  1. Check the continuity between ECM harness connector and combination switch.
  2. Also check harness for short to ground and to power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK ASCD STEERING SWITCH

Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".

NO >> Replace ASCD steering switch. Refer to ST, "Removal and Installation".

Component Inspection

1.CHECK ASCD STEERING SWITCH

  1. Disconnect combination switch (spiral cable) harness connector.
  2. Check the resistance between combination switch harness connector terminals as per the following conditions.

Is the inspection result normal?

YES >> INSPECTION END

NO >> Replace ASCD steering switch. Refer to ST, "Removal and Installation".

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