DTC C1380/64 Stop Light Control Relay Malfunction

Transcription

1 126 DTC C180/6 Stop Light Control Relay Malfunction DESCRIPTION The skid control ECU inputs the stop light switch signal and detects the status of the brake operation. DTC No. DTC Detection Condition Trouble Area C180/6 When one of following conditions is met: 1. When stop light control relay is ON, relay OFF condition continues for 5 seconds or more. 2. When stop light control relay is OFF, relay ON condition continues for 5 seconds.. When stop light control relay is OFF, stop switch monitor (STP2) OFF condition continues for 5 seconds or more. Stop light Stop light switch circuit Stop light control (BRK) relay ABS and TRACTION actuator (skid control ECU)

2 127 WIRI DIAGRAM Stop Light Switch Skid Control ECU STP2 BRK STPO STOP ECU-IG1 IG1 ALT AM1 Ignition Switch AM1 IG1 Rear Combination Light LH FL MAIN STP1 Rear Combination Light RH High Mount Stop Light C12088E01 INSPECTION PROCEDURE NOTICE: When replacing the ABS and TRACTION actuator, perform zero point calibration (see page -2).

3 128 1 CHECK STOP LIGHT (OPERATION) Check that the light illuminates when the brake pedal is depressed, and turns off when the brake pedal is released. Condition Brake pedal depressed Brake pedal released Stop Light Condition Illuminates Turn off Go to step 9 2 CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY) A19 Disconnect the A19 ECU connector. Measure the voltage of the wire harness side connector. Standard voltage Switch Condition A19-21 (STP2) - Body Brake pedal depressed 8 to 16 V ground A19-21 (STP2) - Body ground Brake pedal released Below 1.5 V STP2 C121700E2

4 129 CHECK WIRE HARNESS (SKID CONTROL ECU) A19 Disconnect the A19 ECU connector. Measure the resistance of the wire harness side connector. A19-21 (STP2) - A19-27 (STP1) Below 1 Ω STP2 STP1 C121700E PERFORM ACTIVE TEST BY INTELLIGENT TESTER (STOP LIGHT RELAY) Skid control ECU Select the ACTIVE TEST, generate a control command, and then check that the stop light relay operates. Item Test Details Diagnosis Note STP LAMP RELAY Turn stop light relay ON / OFF Observe stop light : The stop lights illuminate or turn off. Go to step 6 5 RECONFIRM DTC (d) Clear the DTC (see page -7). Start the engine. Drive the vehicle at a speed of 5 km/h ( mph) or more for several seconds. Check if the same DTC is output (see page -7). Result Result DTC is not output DTC is output Proceed to A B B END

5 10 A REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 6 INSPECT STOP LIGHT CONTROL RELAY (Marking: BRK) A087121E01 Remove the stop light control relay from the engine room No. 1 relay block. Measure the resistance of the relay. - Below 1 Ω kω or higher - 10 kω or higher (when battery voltage is applied to terminals 1 and 2) - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2) REPLACE STOP LIGHT CONTROL RELAY

6 11 7 CHECK WIRE HARNESS (EINE ROOM NO. 1 RELAY BLOCK - SKID CONTROL ECU AND BATTERY) Stop Light Control Realay Remove the stop light control relay. Disconnect the A19 ECU connector. Measure the voltage of the wire harness side connector. Standard voltage Condition BRK relay terminal 5 - Always 8 to 16 V Body ground BRK relay terminal 2- Body ground Ignition switch ON 8 to 16 V (d) Measure the resistance of the wire harness side connector. BRK relay terminal 1 - A19-16 (STPO) Below 1 Ω A19 Engine Room No. 1 Relay Block Skid Control ECU STPO C12606E0 8 RECONFIRM DTC (d) Clear the DTC (see page -7). Start the engine. Drive the vehicle at a speed of 5 km/h ( mph) or more for several seconds. Check if the same DTC is output (see page -7). Result Result DTC is not output DTC is output Proceed to A B B END A REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY

7 12 9 CHECK WIRE HARNESS (STOP LIGHT SWITCH - BATTERY) Disconnect the A switch connector. Measure the voltage of the wire harness side connector. Standard voltage A A-2 - Body ground 10 to 1 V C082562E0 10 INSPECT STOP LIGHT SWITCH ASSEMBLY Pin Not Pushed Pushed 2 1 Remove the stop light switch connector. Measure the resistance of the switch. Switch Condition 1-2 Switch pin not pushed Below 1 Ω 1-2 Switch pin pushed 10 kω or higher - Switch pin not pushed 10 kω or higher - Switch pin pushed Below 1 Ω REPLACE STOP LIGHT SWITCH ASSEMBLY C108891E01

8 1 11 CHECK WIRE HARNESS (STOP LIGHT SWITCH - STOP LIGHT CONTROL RELAY) Stop Light Control Realay Disconnect the A switch connector. Remove the stop light control relay. Measure the resistance of the wire harness side connectors. A-1 - BKR relay terminal Below 1 Ω A-1 - Body ground 10 kω or higher Engine Room No. 1 Relay Block Stop Light Swich A C1260E02 12 INSPECT STOP LIGHT CONTROL RELAY (Marking: BRK) A087121E01 Remove the stop light control relay from the engine room No. 1 relay block. Measure the resistance of the relay. - Below 1 Ω kω or higher - 10 kω or higher (when battery voltage is applied to terminals 1 and 2) - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2) REPLACE STOP LIGHT CONTROL RELAY

9 1 1 CHECK WIRE HARNESS (STOP LIGHT AND REAR COMBINATION LIGHT - CONTROL RELAY) Stop Light Control Realay Disconnect the Q1, K12 and K1 light connectors. Remove the stop light control relay. Measure the resistance of the wire harness side connectors. Engine Room No. 1 Relay Block Rear Combination Light K1 K12 K1- - BKR relay terminal Below 1 Ω K1- - Body ground 10 kω or higher K1-1 - Body ground Below 1 Ω K12- - BKR relay terminal Below 1 Ω K12- - Body ground 10 kω or higher K Body ground Below 1 Ω Q1-2 - BKR relay terminal Below 1 Ω Q1-2 - Body ground 10 kω or higher Q1-1 - Body ground Below 1 Ω High Mount Stop Light Q1 1 2 C1261E02 CHECK FOR INTERMITTENT PROBLEMS