Setting and Using Test Mode

DIAGNOSIS INSPECTION (TEST MODE)
Compared to the Normal mode, the Test mode has high sensing ability to detect malfunctions.
It can also detect malfunctions in the starter signal circuit, the IDL contact signal of the throttle position sensor, air conditioning signal and park/neutral position switch signal. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the test mode.

SETTING AND USING TEST MODE
1. Initial conditions.
a. Battery positive voltage 11 V or more.
b. Throttle valve fully closed.
c. Transmission in park/neutral position.
d. Air conditioning switched OFF.
2. Turn ignition switch OFF.




3. Using Special Service Tool (SST) (09843-18020), connect terminals TE2 and E1 of data link connector (DLC1).
4. Turn ignition switch ON.
HINT:
^ To confirm that the test mode is operating, check that the malfunction indicator lamp flashes when the ignition switch is turned to ON.
^ If the malfunction indicator lamp does not flash, refer to Diagnostic Chart for the TE2 terminal circuit.
5. Start the engine.
6. Simulate the conditions of the malfunction described by the customer.

Connecting Terminals TE1 And E1 Of DLC 1.:

7. After the road test, using SST (09843-18020), connect terminals TE1 and E1 of DLC1.
8. Read the Diagnostic Trouble Code on "CHECK" Engine Lamp on the combination meter.




NOTE: As an example, the blinking patterns for codes; normal, 12 and 31 are as shown on the illustration.




9. After completing the check, disconnect terminals TE1, TE2 and E1, and turn off the display.
HINT:
^ The test mode will not start if terminals TE2 and E1 are connected after the ignition switch is turned ON.
^ When vehicle speed is 3 mph (5km/h) or below, diagnostic trouble code "42" (Vehicle speed signal) is output, but this is normal.
^ When the engine is not cranked, diagnostic trouble code "43" (Starter signal) is output, but this is normal.
^ When the automatic transaxle shift lever is in the "D", "2", "L" or "R" shift position, or when the air conditioning is on or when the accelerator pedal is depressed, code "51" (Switch condition signal) is output, but this is normal.

NOTE:
The increased detection ability of the (ECM) in Test mode makes it possible to detect intermittent problems which occur in certain circuits, listed below.
CODE NUMBER 13
Circuit: G, NE signal circuit (No. 2)
CODE NUMBER 22
Circuit: Engine Coolant Temperature sensor circuit
CODE NUMBER 24
Circuit: Intake Air Temperature sensor circuit
CODE NUMBER 31
Circuit: Manifold Absolute Pressure sensor circuit
CODE NUMBER 41
Circuit: Throttle Position sensor circuit

Accordingly, when these diagnostic trouble codes are output during the Diagnostic Trouble Code check, and inspection of the appropriate circuits reveals no abnormality, perform the Test For Momentary Interruption as described in the Problem Confirmation Test under Powertrain Management Testing.
Testing and Inspection