WS2

WS2Flash Codes

Make Toyota Model L4-FE Year 1998

Flash/Blink Codes and procedure
 

Turn the ignition switch ON with the engine not running 

We start from operning the diagnostic plug than a “jumper wire” connect terminals to “TEI” and “ET”. 

The Fault Code shown from the check engine light are 41, 31 and 24. The engine give us clue where to look to find the problem. 

Once we locate the fault than connect back to the sensor and the check engine light no longer flash. A TPS tested for example, The fault code for this component is "41" when we identify this codes than connect the wires back to the TPS. This erase the code from the engine check light.

2 Trouble Codes or Fault Codes

This is the list of codes for Toyota (L4-FE)

Fault Code	ltem	Fault Code	ltem
1	Normal	13	NE Signal Circuit
2	Vacuum Sensor Signal	14	Ignition Circuit
3	Ignition Signal	16	ECT Control Signal
4	Water Temperature Signal	21	Oxygen Sensor Circuit
6	RPM Signal	22	Water Temperature Circuit
7	Throttle Position Sensor	24	Intake Air Temperature Circuit
8	Intake Air Temperature	25	Air/Fuel Ratio Lean Malfunction
9	Vehicle Speed Sensor	31	Vacuum Sensor Circuit
10	Starter Signal	33	Idle Speed Control System
11	Air Conditioner Switch	41	Throttle Position Sensor Circuit
12	G, NE Signal Circuit

 Record codes

Code number	System affected	Condition described
41	TPSC	Disconnect. ruff (faulty)
31	MAP (vacuum sensor)	Disconnect. ruff (faulty)
24	Intake Air Temp	Disconnect. ruff (faulty)

Visual Inspection to find fault

This video shows fault code from the engine light.

Describe the problem(s) you found:

 Firstly we voltage drop the signal volt witch is low and the engine is running ruff and rich, each of these problems were identifying by flash codes. For example the TPS shown from the check engine light, flash four time than last to one flash.

Repair fault

Plug back in the connector, or repair problem found

Describe what you did:

Once the fault detected than erase it by plug the sensor back in the connector. And with the ECU monitor the operation of each sensors result the amount of fuel which need in the engine.

Clear Codes

Erase the codes by connect the plug back to the terminals and check other faults. We also determine the voltage drop from the signal to ECU at this particular moment while the engine idling.

Recheck for codes and record codes in system now:

With TPS fixed but Vacuum sensor still remain fault indicate.

How could the faults found affect the engine performance?

The engine run ruff at idling, showing bad start and run in low range (run richer or lean)

Discuss what other tests you should be doing once you have found the fault

codes:

Test the voltage drop of the reference volts from ECU and signal voltage from the sensor. This would indicate of any bad connection to wires and bad earth. Bad ECU would affect the reference supply voltage, bad signal would affect sensors and ground would be poor earth trigger.