Starting the Fault Diagnosis
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| Illustration 1 | g02338096 |
Control Panel (1a) Temperature select switch (increase) (1b) Temperature select switch (decrease) (2) Air inlet select switch (3) Main power On/Off switch (4) Display of set temperature (5) Defrost switch | |
- Turn the engine start switch to ON.
- Turn main power switch (3) of the air conditioner to OFF.
- Depress temperature select switch (increase) (1a) and the temperature select switch (decrease) (1b) on the control panel at the same time. Hold both switches down for at least 3 seconds.
- The diagnosis procedure shall start. If any error is memorized, the smallest error code is displayed on display (4) . If no problems exist, "E-.-" is displayed.
- When the temperature select switch (increase) (1a) is depressed, error codes are displayed. The error codes are displayed in ascending order from "E11" to "E45". When the temperature select switch (decrease) (1b) is depressed, error codes are displayed. The error codes are displayed in descending order from "E45" to "E11".
Note: When only one error code exists, the same display is repeated. A flashing display means that the error code is continuing from the past. A non-flashing display means that the error code was found in the past, but the error code is not found now.
- When the fault diagnosis is running, the control of each function is altered.
- All outputs from the control panel except error codes are turned OFF.
- The panel light turns ON.
- All outputs from the control panel except error codes are turned OFF.
- Clear the error codes. Depress air inlet select switch (2) and defrost switch (5 ) on the control panel at the same time. Hold both switches down for at least 3 seconds.
Note: Clear any error codes when the equivalent problems have been repaired. Make sure that the same error code is not displayed again. When a problem has not yet been repaired, the equivalent error code should be displayed again.
Ending the Fault Diagnosis
There are two ways to end the fault diagnosis.
- Press main power switch (3) .
- Turn the engine start switch to OFF.
Error Codes
| Control Panel Diagnostic Error Codes | ||
|---|---|---|
| Code | Problem Area | Problem |
| "E11" | Intake air temperature sensor | Open circuit |
| "E12" | Intake air temperature sensor | Short circuit |
| "E13" | Ambient air temperature sensor | Open circuit |
| "E14" | Ambient air temperature sensor | Short circuit |
| "E15" | Water temperature sensor | Open circuit |
| "E16" | Water temperature sensor | Short circuit |
| "E21" | Evaporator sensor | Open circuit |
| "E22" | Evaporator sensor | Short circuit |
| "E33" | Air outlet motor | Open/Short circuit |
| "E34" | Air blend motor | Open/Short circuit |
| "E35" | Air inlet motor | Open/Short circuit |
| "E43" | Damper for air outlet | No movement |
| "E44" | Damper for air blend | No movement |
| "E45" | Damper for air inlet | No movement |
| "E51" | Refrigerant Pressure | High/Low error |
Inspecting a Wiring Harness
Electrical problems are often caused by faulty electrical wires that have either an open circuit or a short circuit. The following procedures explain the test for an open circuit or a short circuit:
ReferenceRefer to Schematic, "Air Conditioning Electrical System" for the correct electrical schematic.
Test for an open circuit.
- Turn the battery disconnect switch key and the key start switch to the OFF position.
Note: A separate electrical wire must be used to perform an open circuit test. Any harness wire can be used.
- Install a jumper (connecting wire) between the two electrical wires at one end of the harness.
- Use a multimeter in order to check for continuity across the two electrical wires at the other end of the harness.
- Turn the multimeter dial to the 200 ohm range and measure the electrical resistance.
Note: If there is continuity between the electrical wires, the multimeter will have a reading of less than 5 ohms. If there is not continuity, the electrical wire is faulty. The electrical wire should be replaced with another wire of the same gauge.
Test for a short circuit.
- Turn the battery disconnect switch key and the key start switch to the OFF position.
- Disconnect the electrical wire.
- Turn the multimeter dial to the 200 ohm range and measure the electrical resistance.
- Use one multimeter probe in order to contact the connector of the faulty electrical wire.
- Use the other probe from the multimeter to check for continuity across all other electrical wires in the same harness.
- If there is continuity between any of the electrical wires, the multimeter will have a reading of less than 5 ohms.
Note: If there is not continuity, the electrical wire is faulty. The electrical wire should be replaced with another wire of the same gauge.