Equus 3173 - Import Code Reader - Manual (Page 48)

Toyota/Lexus
FAULT CODE DEFINITIONS (1 - 16)
45 Chapter 5
TOYOTA/LEXUS FAULT CODE DEFINITIONS
IMPORTANT: Retrieving and utilizing Diagnostic Trouble
Codes (DTCs) for troubleshooting vehicle operation problems is
only one part of an overall diagnostic strategy. Never replace a
part based solely on the DTC definition. Always consult the
vehicle’s service manual for more detailed testing instructions.
Each DTC has a set of testing procedures, instructions and flow
charts that must be followed to confirm the exact location of the
problem. This type of information is found in the vehicle’s
service manual.
Code Description Possible Cause
1 System Normal
2 VAF sensor circuit VAF circuit, ECU
3 No ignition signal Ignition or circuit, coil, ECU
4 ECT sensor circuit ECT sensor or circuit, ECU
5 O2S circuit O2S sensor or circuit, ECU
6 Engine Speed (RPM) sensor circuit Ignitor or circuit, distributor, ECU
7 TPS circuit TPS or circuit, ECU
8 IAT sensor circuit IAT sensor or circuit, ECU
9 VSS circuit VSS sensor or circuit, ECU
10 Starter signal circuit VSS sensor or circuit, main relay
or circuit, ignition circuit, starter
circuit, ECU
11 ECU Power Supply Ignition or circuit, coil, ECU
11 A/C switch ON during code retrieval A/C switch, ECU
11 Closed throttle position switch Throttle position switch or circuit,
OFF during code retrieval ECU
11 Park / Neutral position switch in Park / Neutral switch, start
D during code retrieval switch, ECU
12 Engine Speed (RPM) sensor Distributor or circuit, ignitor or
circuit circuit, starter or circuit, ECU
(non-turbo models); crankshaft
or position sensor / circuit, starter
or circuit, ECU (turbo models)
13 Engine Speed (RPM) sensor above Distributor or circuit, ignitor or
1000 RPM
circuit, starter or circuit, ECU
(non-turbo models); crankshaft or
position sensor / circuit, starter or
circuit, ECU (turbo models)
14 Ignition reference no signal Ignition coil, ignitor or circuit, ECU
14 Turbocharger pressure Turbocharger, airflow meter, ECU
16 Transmission control signal Transaxle ECU or circuit, ECU