Part 1
BASIC DIAGNOSTIC CHARTIf no trouble codes appear in the on-board diagnostics operation (although problems have occurred or are occurring), measure performance characteristics of sensors, actuators, etc., in the Subaru Select Monitor and compare with the "basic data" to determine the cause of problems.
1) Trouble occurs.
2) No trouble codes appear in on-board diagnostics operation.
3) Measure each item using Subaru Select Monitor.
4) Compare measured values with basic data.
5) Determine item which is outside basic data specifications.
6) Check sensor and actuator affected.
BATTERY VOLTAGE
CHECK VEHICLE SPEED SENSOR 1.
CHECK VEHICLE SPEED SENSOR 2.
CHECK ENGINE SPEED SIGNAL.
CHECK ATF TEMPERATURE SENSOR.
CHECK THROTTLE POSITION SENSOR.
CHECK GEAR POSITION.
CHECK LINE PRESSURE DUTY.
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CHECK LOCK-UP DUTY.
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CHECK TRANSFER DUTY.
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CHECK THROTTLE POSITION SENSOR POWER SUPPLY.
CHECK MASS AIR FLOW SIGNAL.
CHECK FWD SWITCH.
DIAGNOSIS:
- LED does not come on even if FWD switch is ON.
- FWD switch circuit is open or short.