P1520 (blink 95) on Toyota Corolla E120: STOP LIGHT SWITCH MALFUNCTION

Short answer: P1520 means “STOP LIGHT SWITCH MALFUNCTION”. The car’s computer has found a fault in the ECT U340E system and turns on the Malfunction indicator lamp (Check Engine). First check: workshop check order (RM821E): READ VALUE OF HAND−HELD TESTER -> CHECK ENGINE ECU FUNCTION -> INSPECT STOP LAMP SWITCH ASSY -> CHECK WIRE HARNESS AND CONNECTOR(Stop Lamp Switch Assy − ECU).

Code

P1520 · blink 95

System

ECT U340E

Dashboard light

Malfunction indicator lamp (Check Engine)

Applies to

4-speed A/T U340E. PK: ZZE122R-GEPNKP 1.8 auto from 07.2005 (EPC fig 3501/3512 note (0507- )ATM..PKN); JDM NZE121 1NZ autos

Market note

Hong Kong only

Confidence

high (official Toyota RM821E)

Source

toyotamanuals.gitlab.io

Symptoms and when it is set

1. No stop light switch signal to ECM during driving. (2−trip detection logic)

Likely causes

1. Wire harness; Stop light switch; Engine ECU

What to check, in order

1. Workshop check order (RM821E): READ VALUE OF HAND−HELD TESTER -> CHECK ENGINE ECU FUNCTION -> INSPECT STOP LAMP SWITCH ASSY -> CHECK WIRE HARNESS AND CONNECTOR(Stop Lamp Switch Assy − ECU)

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P1520 · Toyota Vitz (1st gen)
• P1520 on all cars compared

← P0773/64 P1725/37 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.