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Exiting Diagnostic Mode

To exit diagnostic mode with Super Monitor Display, turn off ignition or push any button (except SET) of Super Monitor Display to display time.

For diagnostic mode without Super Monitor Display, remove jumper wire from engine check connector. Turn ignition off. After cancellation, perform a road test to confirm that a normal code is now displayed.

Fig 1: Entering Diagnostic Mode At Engine Check Connector
G61971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TROUBLE CODE IDENTIFICATION

Code No. Circuit Affected
No Code System Normal
11 ECU (B+)
12 & 13 RPM Signal
14 Ignition Signal
21 Oxygen Sensor Signal
22 Coolant Temperature Sensor Signal
24 Intake Air Temperature Sensor Signal
31 Airflow Meter Signal
32 (1) Airflow Meter Signal, HAC Sensor Signal
34 (1) Turbocharger Pressure
41 Throttle Position Sensor Signal
42 Vehicle Speed Sensor Signal
43 Starter Signal
51 Switch Signal
52 (2) Knock Sensor Signal
53 (2) Knock Sensor Control (ECU)
(1) Only applicable to Supra 7M-GTE turbocharged engine.
(2) Only applicable to Supra.
TROUBLE CODES & PROBABLE CAUSE

Code No. Probable Cause
11  Main Relay Or Circuit, ECU
12 & 13  Distributor Or Circuit, Starter Signal Circuit, ECU
14  Ignitor Or Circuit, ECU
21  Oxygen Sensor Or Circuit, ECU
22  Coolant (Water) Temperature Sensor Or Circuit, ECU
24  Intake Air Temperature Sensor Or Circuit, ECU
31  Airflow Meter Or Circuit, ECU
32  (1) Airflow Meter Or Circuit, ECU
34 (2) Airflow Meter, Turbocharger, ECU
41  Throttle Position Sensor Or Circuit, ECU
42 Vehicle Speed Sensor Or Circuit, ECU
43  Main Relay Circuit, Starter Circuit, Ignition Circuit, ECU
51 (2) Throttle Position Sensor Or Circuit, A/C Switch, Neutral/Start Switch, ECU
52 (3) Knock Sensor Or Circuit, ECU
53 (3) ECU
(1) On Supra 7M-GE engine, probable cause is airflow meter, air flow meter circuit, or ECU. On Supra 7M-GTE engine, probable cause is HAC Sensor, HAC sensor circuit, or ECU.
(2) See appropriate DTC testing for probable cause and turbocharger inspection.
(3) Only applicable to Supra.
Fig 2: Example Of Trouble Code Output for Supra
G61973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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