Test Mode

TEST MODE PROCEDURE

1. INPUT SIGNAL CHECK (Using SST check wire)

HINT:
- This function checks if signals from the stop light switch assembly and the door courtesy light switch, etc. are being input normally to the ECU.
- When entering test mode, the suspension control ECU sets all the test mode DTCs first.

After completing the test mode for each check item, the test mode DTCs that are determined normal by the suspension control ECU will be erased. The test mode DTCs for other check items may not be erased when only a certain signal is inspected.

- When the test mode returns back to normal mode, all the test mode DTCs will be erased.

a. Procedure for Input Signal Check Mode (Test Mode) using SST check wire.

SST 09843-18040

1. Make sure the ignition switch is OFF.
2. Set each of the check items to the condition shown as Operation a. in the test mode table.




3. Using SST, connect terminals TS and CG of the DLC3.
4. Turn the ignition switch to the ON position.




5. Check that the height control OFF indicator light is blinking.

HINT:
- The height control OFF indicator light comes on for 2 seconds, then blinks at 0.25 sec. intervals.
- If the height control OFF indicator light does not blink, inspect the height control manual indicator light circuit and the TS terminal circuit.

6. Set each of the check items to the condition shown as Operation (B) in the test mode table.









HINT: When checking each item, the height control OFF indicator light should comes on for 1 second.




7. Using SST, connect the 3rd terminal of the SST check wire to terminal TC of the DLC3.

SST 09843-18040




8. Read the number of blinks of the height control OFF indicator light.

HINT:
- As examples, the blinking patterns of a normal system code and code 82 are shown in the illustration.
- If 2 or more malfunctions are indicated at the same time, the lowest numbered code is displayed first.
- When a DTC is not output, check the TC terminal circuit.




9. Check the malfunction using the test mode DTC chart.

b. Ending the Input Signal Check Mode (Test Mode) using SST check wire.

SST 09843-18040

1. With the ignition switch OFF, disconnect the SST check wire from the terminals of the DLC3 and then turn the ignition switch to the ON position.

c. Procedure for Sensor Test Mode (Test Mode) using the intelligent tester.
1. Make sure the ignition switch is OFF.
2. Set each of the check items to the condition shown as Operation (A) in the test mode table.

3. Connect the intelligent tester to the DLC3.
4. Turn the ignition switch to the ON position.
5. Select SIGNAL CHECK mode on the intelligent tester.
6. Set each of the check items to the condition shown as Operation (B) in the test mode table (Procedure "A").

HINT: In procedure "A", all signals can be checked together.

7. Read the DTCs by following the prompts on the tester screen.

HINT: Refer to the intelligent tester operators manual for further details.




d. DTC of air suspension system test mode (input signal check) function:
If a trouble code is displayed during the test mode DTC check, check the circuit listed for that code.

2. INPUT SIGNAL CHECK (Using INTELLIGENT TESTER)

HINT:
- This function checks if signals from the stop light switch assembly and the door courtesy light switch, etc. are being input normally to the ECU.
- When entering test mode, the suspension control ECU sets all the test mode DTCs first. After completing the test mode for each check item, the test mode DTCs that are determined normal by the suspension control ECU will be erased.

The test mode DTCs for other check items may not be erased when only a certain signal is inspected.

- When the test mode returns back to normal mode, all the test mode DTCs will be erased.




a. Procedure for Test Mode (Input signal check).
1. Make sure that the ignition switch is off.
2. Set each of the check items to the condition shown as Operation (A) in the test mode table.
3. Connect the intelligent tester to the DLC3.
4. Turn the ignition switch to the ON position.
5. Select TEST MODE mode on the intelligent tester.




6. Set each of the check items to the condition shown as Operation (B) in the test mode table ( (Procedure "C").

HINT: In procedure "C", all signals can be checked together.

7. Read the test mode DTCs by following the prompts on the tester screen.

HINT: Refer to the intelligent tester operator's manual for further details.

8. Check the malfunction using the code table. After completing the test mode, disconnect the tester and turn the ignition switch off.

C1782/82-C1797/97:

b. DTC of air suspension system test mode (input signal check) function:
If a trouble code is displayed during the test mode DTC check, check the circuit listed for that code.