this is how to diagnose the CEL codes for the ecu. you find the blue jumper wire in the passenger kick pannel. and you run a line from one connector to another. if its a single digit code, it will flash quickly a bunch of times, just count them. if its double, like 21... it have two long flashes followed by one quick, then a pause and repeat.
heres what they all are:
00
ECU
Defective ECU
01
Primary O2 sensor
Open or short in O2 sensor circuit, defective Primary O2 sensor
02
Secondary O2 sensor
Open or short in O2 sensor circuit, defective Secondary O2 sensor
03
Manifold Absolute Pressure sensor
Open or short in MAP sensor circuit, defective MAP sesnor
04
Crankshaft Position sensor
Timing belt slipped, defective CP sensor
05
Manifold Absolute Pressure sensor
Reading too low or too high, defective MAP sensor
06
Engine Coolant Temp circuit
Reading too low or too high, open or short in circuit, defective ECT circuit
07
Throttle Position circuit
Reading too low or too high, open or short in circuit, defective TPS circuit
08
Top Dead Center sensor
Open or short in TDC sensor circuit, defective TDC sensor
09
Cylinder Position sensor
Open or short in CYP sensor circuit, defective CYP sensor
10
Intake Air Temperature sensor
Open or short in IAT sensor circuit, defective IAT sensor
12
Exhaust Gas Recirculation Valve
Open or short in EGR valve circuit, defective EGR valve
13
Barometric Pressure sensor circuit
Defective ECM (Barometric sensor)
14
Idle Control System Malfunction
Defective IAC valve, defective fast idle thermo valve, throttle body
15
Ignition Output Signal
Missing, defective or noisy Ignition Output Signal
16
Fuel Injector System
Defective or malfunctioning Fuel Injector System
17
Vehicle Speed sensor circuit
Open or short in VS sensor circuit, defective VS sensor
19
Lock-up Control Solenoid
Open or short in LCS circuit, defective LCS solenoid
20
Electrical Load Detector circuit
Open or short in ELD circuit, defective ELD circuit
21
VTEC Solenoid Valve
Open or short in VTEC solenoid valve circuit, defective VTEC solenoid valve
22
VTEC Oil Pressure Switch
Open or short in VTEC OPS circuit, defective VTEC pressure switch
23
Knock sensor circuit
Open or short in Knock sensor circuit, defective Knock sensor circuit
30
A/T FI Signal A high/low input
Defective AFSA line, TCM
31
A/T FI Signal B high/low input
Defective AFSB line, TCM
41
Primary Heated O2 sensor heater circuit
Open or short in Primary O2 sensor heater circuit, defective Primary O2 sensor heater circuit
43
Fuel Supply System
Defective or malfunctioning Fuel Supply System
45
System too lean/rich
Fuel supply system, Primary O2 sensor, MAP sensor, contaminated fuel, valve clearance, exhaust leakage
48
Lean Air Fuel sensor
Open or short in Lean Air Fuel sensor circuit, defective Lean Air Fuel sensor
54
Crankshaft Speed Fluctuation sensor
Open or short in CKF sensor circuit, defective CKF sensor circuit
58
Top Dead Center sensor #2
Open or short in TDC sensor circuit, defective TDC sensor
61
Primary Heated O2 sensor
Slow response, exhaust leak, defective Primary Heated O2 sensor
63
Secondary Heated O2 sensor
Slow response, exhaust leak, defective Secondary Heated O2 sensor
65
Secondary Heated O2 sensor circuit
Open or short in Secondary Heated O2 sensor circuit, defective Secondary Heated O2 sensor circuit
TCU Codes:
CODE LIST:
1-Lock-up solenoid 'A' circuit open or shorted.
2-Lock-up solenoid 'B' circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted - No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid 'A' circuit open or shorted.
8-Shift Solenoid 'B' circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.