Inspection Procedure
- READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)
- Check the Data List for proper functioning of the stop light switch.
Radar Cruise
DATA LIST TABLETester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light SW 1 M-CPU Stop light switch signal (Main CPU) / ON or OFF OK: Brake pedal is depressed
OFF: Brake pedal is released- Stop Light SW 2 M-CPU Stop light switch signal (Main CPU) / ON or OFF OK: Brake pedal is depressed
OFF: Brake pedal is released- Stop Light SW 1 S-CPU Stop light switch signal (Sub CPU) / ON or OFF OK: Brake pedal is depressed
OFF: Brake pedal is released- OK: Display changes according to brake pedal operation described in above table.
NG: Go to step 2
OK: REPLACE DRIVING SUPPORT ECU (See REMOVAL )
- Check the Data List for proper functioning of the stop light switch.
- INSPECT FUSE (STOP, ECU-IG)
- Remove the STOP fuse from the main body ECU.
- Remove the ECU-IG fuse from the engine room No. 2 junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE SPECIFICATION TABLETester Connection Condition Specified Condition STOP fuse Always Below 1 Ω ECU-IG fuse Always Below 1 Ω NG: REPLACE FUSE
OK: Go to Next Step
- INSPECT STOP LIGHT SWITCH ASSEMBLY
- Remove the stop light switch (see REMOVAL ).
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE SPECIFICATION TABLETester Connection Switch Condition Specified Condition 1 - 2 Pushed 10 kΩ or higher 1 - 2 Not pushed Below 1 Ω 3 - 4 Not pushed Below 1 Ω 3 - 4 Pushed 10 kΩ or higher NG: REPLACE STOP LIGHT SWITCH ASSEMBLY (See REMOVAL )
OK: Go to Next Step
- CHECK HARNESS AND CONNECTOR (ECU - BATTERY)
- Disconnect the A33 ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
VOLTAGE SPECIFICATION TABLETester Connection Switch Condition Specified Condition A33-11 (STP-) - Body ground Brake pedal is depressed Below 1 V A33-11 (STP-) - Body ground Brake pedal is released 11 to 14 V A33-34 (ST1-) - Body ground Engine switch Is on (IG), brake pedal is released 11 to 14 V A33-34 (ST1-) - Body ground Engine switch is on (IG), brake pedal is depressed Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE DRIVING SUPPORT ECU (See REMOVAL )