Electronically Controlled Brake (Diagnostic Codes & Symptom Tests): D… — Electronically Controlled Brake (Diagnostic Codes & Symptom Tests) — Anti-Lock/traction Control

INSPECTION PROCEDURE

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 65

Scheme 65: PROCEDURE

Scheme 66

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-398097-S38565635072011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition FR Speed Open Front speed sensor RH open detection / Error or Normal Error: Momentary interruption Normal: Normal FL Speed Open Front speed sensor LH open detection / Error or Normal Error: Momentary interruption Normal: Normal OK There are no momentary interruptions. HINT: Perform the above inspection before removing the sensor and connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR) Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note FR Wheel Speed Front speed sensor RH / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations FL Wheel Speed Front speed sensor LH / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations Check that the speed value output from the speed sensor displayed on the Techstream. HINT: Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart. Refer to «ON-VEHICLE INSPECTION»(ref-398261-S39489223442011051600000) . OK The speed value output from the speed sensor displayed on the Techstream is the similar speed as indicated on the speedometer. NG --> See step 5 OK: Go to next step
PERFORM TEST MODE INSPECTION (SIGNAL CHECK) Turn the power switch off. Perform the sensor check in the Test Mode procedure. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . OK All Test Mode DTCs are cleared. NG --> See step 5 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0200/31 and C0205/32) are not output A DTCs (C0200/31 and/or C0205/32) are output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 10 A --> See step 14
CHECK FRONT SPEED SENSOR INSTALLATION Turn the power switch off. Check the speed sensor installation. OK There is no clearance between the sensor and the front steering knuckle. The installation bolt is tightened properly. Torque 8.5 N*m (87 kgf*cm, 75 in.*lbf) NG --> See step 16 OK: Go to next step
CHECK FRONT SPEED SENSOR TIP Remove the front speed sensor. Refer to «REMOVAL»(ref-398283-S31775659082011051600000) . Check the speed sensor tip. OK The sensor tip is free of scratches, oil, and foreign matter. NOTE: Check the speed sensor signal after cleaning or replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . NG --> CLEAN OR REPLACE FRONT SPEED SENSOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the skid control ECU connector and the front speed sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance for RH for LH Tester Connection Condition Specified Condition A60-18 (FR+) - A38-2 (FR+) Always Below 1 ohms A60-18 (FR+) - Body ground Always 10 kohms or higher A60-5 (FR-) - A38-1 (FR-) Always Below 1 ohms A60-5 (FR-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition A60-31 (FL+) - A20-2 (FL+) Always Below 1 ohms A60-31 (FL+) - Body ground Always 10 kohms or higher A60-32 (FL-) - A20-1 (FL-) Always Below 1 ohms A60-32 (FL-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT SKID CONTROL ECU (SENSOR OUTPUT) Reconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage for RH for LH Tester Connection Switch Condition Specified Condition A38-2 (FR+) - Body ground Power switch on (IG) 5.7 to 14 V Tester Connection Switch Condition Specified Condition A20-2 (FL+) - Body ground Power switch on (IG) 5.7 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Front Speed Sensor) NG --> See step 15 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Reconnect the front speed sensor connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0200/31 and/or C0205/32) are output A DTCs (C0200/31 and C0205/32) are not output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 14 A: Go to next step
REPLACE FRONT SPEED SENSOR Turn the power switch off. Replace the front speed sensor. Refer to «REMOVAL»(ref-398283-S31775659082011051600000) . NOTE: Check the speed sensor signal after replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . NEXT: Go to next step
RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0200/31 and/or C0205/32) are output A DTCs (C0200/31 and C0205/32) are not output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> END A: Go to next step
REPLACE FRONT SPEED SENSOR ROTOR Turn the power switch off. Replace the front axle hub sub-assembly (front speed sensor rotor). Refer to «REMOVAL»(ref-398281-S20990320642011051600000) . HINT: The front speed sensor rotor is incorporated into the front axle hub sub-assembly. If the front speed sensor rotor needs to be replaced, replace it together with the front axle hub sub-assembly. NOTE: Check the speed sensor signal after replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . NEXT: Go to next step
RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0200/31 and/or C0205/32) are output A DTCs (C0200/31 and C0205/32) are not output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> END A --> See step 15
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSTALL FRONT SPEED SENSOR CORRECTLY. Refer to «INSTALLATION»(ref-398283-S05338554012011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 67

Scheme 67: PROCEDURE

Scheme 68

Scheme 69

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-398097-S38565635072011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition RR Speed Open Rear speed sensor RH open detection / Error or Normal Error: Momentary interruption Normal: Normal RL Speed Open Rear speed sensor LH open detection / Error or Normal Error: Momentary interruption Normal: Normal OK There are no momentary interruptions. HINT: Perform the above inspection before removing the sensor and connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
READ VALUE USING TECHSTREAM (REAR SPEED SENSOR) Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note RR Wheel Speed Rear speed sensor RH / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations RL Wheel Speed Rear speed sensor LH / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations Check that the speed value output from the speed sensor displayed on the Techstream. HINT: Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart. Refer to «ON-VEHICLE INSPECTION»(ref-398261-S39489223442011051600000) . OK The speed value output from the speed sensor displayed on the Techstream is the similar speed as indicated on the speedometer. NG --> See step 5 OK: Go to next step
PERFORM TEST MODE INSPECTION (SIGNAL CHECK) Turn the power switch off. Perform the sensor check in the Test Mode procedure. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . OK All Test Mode DTCs are cleared. NG --> See step 5 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0210/33 and C0215/34) are not output A DTCs (C0210/33 and/or C0215/34) are output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 10 A --> See step 12
CHECK REAR SPEED SENSOR INSTALLATION Turn the power switch off. Check the speed sensor installation. OK There is no clearance between the sensor and rear axle carrier. NG --> See step 14 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the rear speed sensor connector and the skid control sensor wire. Measure the resistance according to the value(s) in the table below. Standard Resistance for RH for LH Tester Connection Condition Specified Condition z4 ("A"-2) - z4 ("B"-1) Always Below 1 ohms z4 ("A"-2) - z4 ("B"-2) Always 10 kohms or higher z4 ("A"-2) - Body ground Always 10 kohms or higher z4 ("A"-1) - z4 ("B"-2) Always Below 1 ohms z4 ("A"-1) - z4 ("B"-1) Always 10 kohms or higher z4 ("A"-1) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition z3 ("A"-2) - z3 ("B"-1) Always Below 1 ohms z3 ("A"-2) - z3 ("B"-2) Always 10 kohms or higher z3 ("A"-2) - Body ground Always 10 kohms or higher z3 ("A"-1) - z3 ("B"-2) Always Below 1 ohms z3 ("A"-1) - z3 ("B"-1) Always 10 kohms or higher z3 ("A"-1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of skid control sensor wire *2 for RH *3 for LH *4 Front view of wire harness connector (to Sensor Side Connector "A") *5 Front view of wire harness connector (to Vehicle Side Connector "B") NOTE: Check the speed sensor signal after replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . NG --> See step 15 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL SENSOR WIRE) Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance for RH for LH Tester Connection Condition Specified Condition A60-22 (RR+) - A1 (RR+) Always Below 1 ohms A60-22 (RR+) - Body ground Always 10 kohms or higher A60-9 (RR-) - A2 (RR-) Always Below 1 ohms A60-9 (RR-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition A60-20 (RL+) - B1 (RL+) Always Below 1 ohms A60-20 (RL+) - Body ground Always 10 kohms or higher A60-7 (RL-) - B2 (RL-) Always Below 1 ohms A60-7 (RL-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT SKID CONTROL ECU (SENSOR OUTPUT) Reconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage for RH for LH Tester Connection Switch Condition Specified Condition A1 (RR+) - Body ground Power switch on (IG) 5.7 to 14 V Tester Connection Switch Condition Specified Condition B1 (RL+) - Body ground Power switch on (IG) 5.7 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control Sensor Wire) NG --> See step 13 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Reconnect the rear speed sensor connector and the skid control sensor wire. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0210/33 and/or C0215/34) are output A DTCs (C0210/33 and C0215/34) are not output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 12 A: Go to next step
REPLACE REAR SPEED SENSOR AND REAR SPEED SENSOR ROTOR Turn the power switch off. Replace the rear speed sensor and the rear axle hub and bearing assembly (rear speed sensor rotor). Refer to «REMOVAL»(ref-398283-S36577612732011051600000) . HINT: The rear speed sensor rotor is incorporated into the rear axle hub and bearing assembly. If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly with rear speed sensor. NOTE: Check the speed sensor signal after replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . NEXT: Go to next step
RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C0210/33 and/or C0215/34) are output A DTCs (C0210/33 and C0215/34) are not output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> END A --> See step 13
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSTALL REAR SPEED SENSOR CORRECTLY. Refer to «INSTALLATION»(ref-398283-S25825080822011051600000)
REPLACE SKID CONTROL SENSOR WIRE. Refer to «REMOVAL»(ref-398283-S36577612732011051600000)

Note. When replacing the yaw rate and acceleration sensor, perform zero point calibration. Refer to CALIBRATION .

HINT

When U0123/62 and/or U0124/95 is output together with C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62 and/or U0124/95 first. Refer to DTC U0073/94: Control Module Communication Bus OFF; DTC U0123/62: Lost Communication with Yaw Rate Sensor Module; DTC U0124/95: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63: Lost Communication with Steering Angle Sensor Module; DTC U0293/59: Communication Error from HV ECU .

Scheme 70

Scheme 70: PROCEDURE

Scheme 71

CHECK DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch off. Turn the power switch on (READY). Drive the vehicle at a speed of 30 km/h (19 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle. Turn the power switch on (IG) again and check that no CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Check if DTC C1210/36 (Zero Point Calibration of Yaw Rate Sensor Undone) or C1336/98 (Zero Point Calibration of Acceleration Sensor Undone) is output. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C1210/36, C1336/98 and CAN communication system DTC) are not output A CAN communication system DTC is output B DTCs (C1210/36 and/or C1336/98) are output C C --> See step 7 B --> See step 6 A: Go to next step
CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION Turn the power switch off. Check that the yaw rate and acceleration sensor has been installed properly. Refer to «INSTALLATION»(ref-398283-S29490234522011051600000) . OK The sensor is tightened to the specified torque. The sensor is not tilted. NG --> See step 8 OK: Go to next step
INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL) Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the yaw rate and acceleration sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F3-4 (IG) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Yaw Rate and Acceleration Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT) OK: Go to next step
INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL) Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F3-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Yaw Rate and Acceleration Sensor) NOTE: Check the yaw rate and acceleration sensor signal after replacement. Refer to «TEST MODE PROCEDURE»(ref-398097-S15603599552011051600000) . HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK --> See step 5
REPLACE YAW RATE AND ACCELERATION SENSOR. Refer to «REMOVAL»(ref-398283-S41088538692011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398097-S01025085302011051600000)
INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY. Refer to «INSTALLATION»(ref-398283-S29490234522011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When releasing the parking brake, chock the wheels for safety.

Scheme 72

Scheme 72: PROCEDURE

Scheme 73

CHECK BRAKE FLUID LEVEL Check that the brake fluid level is sufficient. OK Brake fluid level is sufficient. HINT: If the fluid level is low, check for fluid leaks, and repair as necessary. Check for brake fluid leaks (Connection between the brake booster pump, brake master cylinder reservoir and brake booster with master cylinder, and the brake booster with master cylinder and wheel cylinders). HINT: If no leaks exist, add and adjust fluid using the Techstream. Refer to «ON-VEHICLE INSPECTION»(ref-398212-S30140755622011051600000) . Check that the trouble code is not output again. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Check that there are no leaks from the connections between the brake booster pump and brake booster with master cylinder. HINT: As a visual check is very difficult, perform the check with the following procedure. Bleed the air from the brake systems. Refer to «BLEEDING»(ref-398212-S16440749292011051600000) . Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note Accumulator Sensor Accumulator pressure sensor / Min.: 0 V, Max.: 5 V Specified value: 2.9 to 4.2 V When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator Wait for 30 seconds without depressing the brake pedal. Check that the accumulator pressure sensor output values change is within the specified range. OK Accumulator pressure sensor output values change is within 0.55 V. NG --> CHECK AND REPAIR BRAKE FLUID LEAKS OR ADD FLUID OK: Go to next step
INSPECT BRAKE FLUID LEVEL WARNING SWITCH Turn the power switch off. Remove the reservoir filler cap and strainer. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the brake fluid level warning switch connector. Measure the resistance according to the value(s) in the table below. HINT: A float is located inside the reservoir. Its position changes according to the level of brake fluid. Standard Resistance Tester Connection Switch Condition Specified Condition 1 (+) - 2 (E) Brake fluid level warning switch OFF (Float up) 1.84 to 2.16 kohms 1 (+) - 2 (E) Brake fluid level warning switch ON (Float down) Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Brake Fluid Level Warning Switch) NG --> See step 8 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE FLUID LEVEL WARNING SWITCH) Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-36 (LBL) - A22-1 (+) Always Below 1 ohms A60-36 (LBL) - Body ground Always 10 kohms or higher A22-2 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT SKID CONTROL ECU (SWITCH INPUT) Reconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A22-1 (+) - Body ground Power switch on (IG) 4 to 7 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Brake Fluid Level Warning Switch) NG --> See step 9 OK: Go to next step
CHECK BRAKE DISC Turn the power switch off. Reconnect the brake fluid level warning switch connector. Disconnect the brake pedal stroke sensor connector. Perform a road test according to Freeze Frame Data or customer problem analysis. Check the brake line pressure vibration caused due to uneven wear of the disc according to brake pedal vibration. OK Brake pedal does not vibrate during braking. HINT: An unevenly worn disc may vibrate the caliper piston and cause fluctuations in brake line pressure, triggering a malfunction detection condition. The brake pedal does not kick back due to wheel cylinder piston vibration during electronically controlled brake system control. If the brake pedal stroke sensor connector is disconnected, the fail-safe function will prohibit electronically controlled brake system control. The Active Test does not prohibit electronically controlled brake system control when driving the vehicle, so disconnect the stroke sensor connector before continuing with inspection. Disc uneven wear can be checked by measuring the disc thickness variation. Refer to «INSPECTION»(ref-398221-S04328254372011051600000) for front, or. Refer to «INSPECTION»(ref-398222-S32942146302011051600000) for rear). NG --> REPLACE BRAKE DISC OK: Go to next step
RECONFIRM DTC Reconnect the brake pedal stroke sensor connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC (C1202/68) is not output A DTC (C1202/68) is output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 9 A --> See step 7
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH). Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION . When replacing the yaw rate and acceleration sensor, perform zero point calibration. Refer to CALIBRATION .

HINT

When U0123/62 and/or U0124/95 is output together with C1210/36 and/or C1336/98, inspect and repair trouble areas indicated by U0123/62 and/or U0124/95 first. Refer to DTC U0073/94: Control Module Communication Bus OFF; DTC U0123/62: Lost Communication with Yaw Rate Sensor Module; DTC U0124/95: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63: Lost Communication with Steering Angle Sensor Module; DTC U0293/59: Communication Error from HV ECU .

Note. When replacing the brake booster with master cylinder (skid control ECU or brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Note. When replacing the brake booster with master cylinder (brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When C1364/61 is output together with C1214/62, inspect and repair the trouble areas indicated by C1364/61 first. Refer to DTC C1246/46: Master Cylinder Pressure Sensor Malfunction; DTC C1281/81: Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC); DTC C1364/61: Wheel Cylinder Pressure Sensor Malfunction .

HINT

When U0126/63 is output together with C1231/31, inspect and repair the trouble areas indicated by U0126/63 first. Refer to «DTC U0073/94: Control Module Communication Bus OFF; DTC U0123/62: Lost Communication with Yaw Rate Sensor Module; DTC U0124/95: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63: Lost Communication with Steering Angle Sensor Module; DTC U0293/59: Communication Error from HV ECU»(ref-398289-S17366503172011051600000) .
When the speed sensor or the yaw rate and acceleration sensor are malfunctioning, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate and acceleration sensor are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor first, and then inspect and repair the steering angle sensor.

Scheme 74

Scheme 74: PROCEDURE

Scheme 75

CHECK DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch off. Turn the power switch on (IG) again and check that no CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Drive the vehicle and turn the steering wheel to the right and left at the speed of 35 km/h (22 mph) and check that no speed sensor and/or yaw rate and acceleration sensor DTCs are output. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC (C1231/31) is output A CAN communication system DTC is output B Speed sensor and/or yaw rate and acceleration sensor DTC is output C DTC (C1231/31) is not output D HINT: When DTCs indicating CAN communication system malfunctions are output, repair the CAN communication system before repairing each corresponding sensor. If there is a malfunction in the speed sensor or the yaw rate and acceleration sensor, an abnormal value may be output although the steering angle sensor is normal. If speed sensor and yaw rate and acceleration sensor DTCs are output simultaneously, repair these two sensors and inspect the steering angle sensor. D --> See step 7 C --> See step 6 B --> See step 5 A: Go to next step
INSPECT STEERING ANGLE SENSOR (POWER SOURCE TERMINAL) Turn the power switch off. Remove the steering wheel and the column cover. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the steering angle sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F5-5 (IG1) - Body ground Power switch on (IG) 11 to 14 V F5-6 (BAT) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Angle Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK: Go to next step
INSPECT STEERING ANGLE SENSOR (GROUND TERMINAL) Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F5-2 (ESS) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Angle Sensor) HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) OK --> See step 4
REPLACE SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR). Refer to «REMOVAL»(ref-398283-S05537299482011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398097-S01025085302011051600000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 76

Scheme 76: PROCEDURE

Scheme 77

CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) Check if the smart access system with push-button start (for start function) DTC is output. Refer to «DTC CHECK / CLEAR»(ref-398093-S26317516792011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 9 A: Go to next step
CHECK HYBRID CONTROL SYSTEM Check if the hybrid control system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-398094-S29961611252011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 10 A: Go to next step
CHECK DTC Check that no main relay DTC is output. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to Main relay malfunction DTC is not output A Main relay malfunction DTC is output B B --> See step 11 A: Go to next step
CHECK AUXILIARY BATTERY Check the auxiliary battery voltage. Standard Voltage 11 to 14 V NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
INSPECT SKID CONTROL ECU (POWER SOURCE TERMINAL) Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A60-14 (BI) - Body ground Always 11 to 14 V A60-15 (BS) - Body ground Always 11 to 14 V A60-16 (IG1) - Body ground Power switch on (IG) 11 to 14 V A60-12 (IG2) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK: Go to next step
INSPECT SKID CONTROL ECU (GND TERMINAL) Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-28 (GND) - Body ground Always Below 1 ohms A60-27 (GND2) - Body ground Always Below 1 ohms A60-26 (GND3) - Body ground Always Below 1 ohms A60-25 (GND4) - Body ground Always Below 1 ohms A60-24 (GND5) - Body ground Always Below 1 ohms A60-23 (GND6) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
RECONFIRM DTC Reconnect the skid control ECU connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C1241/41 and C1242/42) are not output A DTCs (C1241/41 and/or C1242/42) are output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 12 A --> See step 8
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
INSPECT SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398093-S16544608052011051600000)
INSPECT HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000)
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398097-S01025085302011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU or brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Note. When replacing the brake booster with master cylinder (skid control ECU) or brake pedal stroke sensor, perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

Check the condition of each related circuit connector before troubleshooting. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

Scheme 78

Scheme 78: PROCEDURE

CHECK BRAKE PEDAL Check that the brake pedal and the brake pedal stroke sensor are properly installed and that the pedal can be depressed normally. Check and adjust the brake pedal height. Refer to «ADJUSTMENT - Step 1»(ref-398212-S32968339752011051600000) . Adjust the brake pedal stroke sensor. Refer to «INSTALLATION - Step 3»(ref-398283-S17271781112011051600000) . NEXT: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL STROKE SENSOR) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the skid control ECU connector and the brake pedal stroke sensor connector. Check both the connector case and the terminal for deformation and corrosion. OK No deformation or corrosion. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-39 (VCSK) - A18-3 (VCSK) Always Below 1 ohms A60-39 (VCSK) - Body ground Always 10 kohms or higher A60-41 (SKG) - A18-1 (SKG) Always Below 1 ohms A60-41 (SKG) - Body ground Always 10 kohms or higher A60-42 (SKS) - A18-4 (SKS1) Always Below 1 ohms A60-42 (SKS) - Body ground Always 10 kohms or higher A60-40 (SKS2) - A18-2 (SKS2) Always Below 1 ohms A60-40 (SKS2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT SKID CONTROL ECU (SENSOR OUTPUT) Reconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A18-3 (VCSK) - A18-1 (SKG) Power switch on (IG) 4.84 to 5.16 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Brake Pedal Stroke Sensor) NG --> See step 5 OK --> See step 4
REPLACE BRAKE PEDAL STROKE SENSOR. Refer to «REMOVAL»(ref-398283-S40231172782011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 79

Scheme 79: PROCEDURE

Scheme 80

Scheme 81

CHECK STOP LIGHT OPERATION Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released. OK Condition Illumination Condition Brake pedal depressed ON Brake pedal released OFF NG --> See step 4 OK: Go to next step
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Check that the stop light switch display observed on the Techstream changes according to brake pedal operation. OK The Techstream displays ON or OFF according to brake pedal operation. NG --> See step 9 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Depress the brake pedal several times to test the stop light circuit. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC (C1249/49) is not output A DTC (C1249/49) is output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 12 A --> See step 10
INSPECT STOP FUSE Remove the STOP fuse from the main body ECU (instrument panel junction block). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition STOP (10 A) fuse Always Below 1 ohms TEXT IN ILLUSTRATION *1 Main Body ECU (Instrument Panel Junction Block) *2 STOP Fuse NG --> REPLACE STOP FUSE OK: Go to next step
INSPECT STOP LIGHT SWITCH (POWER SOURCE TERMINAL) Install the STOP fuse. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the stop light switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A25-2 - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Stop Light Switch) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK: Go to next step
INSPECT STOP LIGHT SWITCH Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - 2 Switch pin free Below 1 ohms 1 - 2 Switch pin pushed in 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Stop Light Switch) NG --> See step 13 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH) Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-33 (STP) - A25-1 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
RECONFIRM DTC Reconnect the skid control ECU connector and the stop light switch connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Depress the brake pedal several times to test the stop light circuit. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC (C249/49) is not output A DTC (C1249/49) is output B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 12 A --> See step 11
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH) Turn the power switch off. Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the skid control ECU connector and the stop light switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-33 (STP) - A25-1 Always Below 1 ohms HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
INSPECT LIGHTING SYSTEM (STOP LIGHT CIRCUIT). Refer to «PROBLEM SYMPTOMS TABLE»(ref-398106-S06780682002011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
REPLACE STOP LIGHT SWITCH. Refer to «REMOVAL»(ref-398250-S36734027602011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU or brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 82

Scheme 82: PROCEDURE

Scheme 83

Scheme 84

Scheme 85

PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Test Part Control Range ECB* Motor Relay ABS motor relay Relay ON/OFF *: Electronically Controlled Brake System Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note ECB* Motor Relay ABS motor relay / ON or OFF ON: Relay on OFF: Relay off - *: Electronically Controlled Brake System Check the operating condition of the ABS motor relay when operating it using the Techstream. Result Result Proceed to ABS motor relay in the Data List turns ON/OFF using the Active Test A ABS motor relay in the Data List does not change using the Active Test B B --> See step 6 A: Go to next step
INSPECT BRAKE BOOSTER PUMP Turn the power switch off. Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the brake booster pump connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A45-1 (BM1) - A45-2 (GND1) Always Below 10 ohms A46-2 (BM2) - A46-1 (GND2) Always Below 10 ohms A45-1 (BM1) - A46-2 (BM2) Always Below 1 ohms A45-2 (GND1) - A46-1 (GND2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Brake Booster Pump) NG --> See step 12 OK: Go to next step
INSPECT BRAKE BOOSTER PUMP (GND TERMINAL) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A45-2 (GND1) - Body ground Always Below 1 ohms A46-1 (GND2) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Brake Booster Pump) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
READ VALUE USING TECHSTREAM (ACCUMULATOR PRESSURE SENSOR) Reconnect the brake booster pump connectors. Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note Accumulator Sensor Accumulator pressure sensor / Min.: 0 V, Max.: 5 V Specified value: 2.9 to 4.2 V When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator Wait for 30 seconds without depressing the brake pedal. Check that the accumulator pressure sensor output values change is within the specified range. OK Accumulator pressure sensor output values change is within 0.55 V. NG --> See step 9 OK: Go to next step
RECONFIRM DTC Turn the power switch off. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (IG). Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C1252/52 and C1253/53) are not output A DTCs (C1252/52 and/or C1253/53) are output B B --> See step 11 A --> See step 10
INSPECT ABS MTR FUSES Turn the power switch off. Remove the ABS MTR fuses. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ABS MTR1 (30 A) fuse Always Below 1 ohms ABS MTR2 (30 A) fuse Always Below 1 ohms TEXT IN ILLUSTRATION *1 Engine Room Relay Block *2 ABS MTR1 Fuse *3 ABS MTR2 Fuse NG --> REPLACE ABS MTR FUSES OK: Go to next step
INSPECT SKID CONTROL ECU (MRI TERMINAL) Install the ABS MTR fuses. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A60-1 (MRI1) - Body ground Always 11 to 14 V A60-2 (MRI2) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MRI CIRCUIT) OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE BOOSTER PUMP) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the brake booster pump connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-29 (MRO1) - A45-1 (BM1) Always Below 1 ohms A60-29 (MRO1) - Body ground Always 10 kohms or higher A60-30 (MRO2) - A46-2 (BM2) Always Below 1 ohms A60-30 (MRO2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
PERFORM ACTIVE TEST USING TECHSTREAM (SOLENOID VALVE) Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . HINT: The Active Test can be performed when the following conditions are met. ABS main relay is on. Park (P) is selected. Parking brake is applied. Vehicle speed is 0 km/h (0 mph). ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note ECB* Solenoid (SMC/SRC/SCC) Switching solenoid valve (SMC/SRC/SCC) Solenoid ON/OFF Operation sound of solenoid (clicking sound) can be heard *: Electronically Controlled Brake System Perform the Active Test of the solenoid using the Techstream. Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note Wheel Cylinder Pressure Sensor Wheel cylinder pressure sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.1 to 0.9 V Reading increases when brake pedal is depressed Check that the output value of the wheel cylinder does not increase. OK The output value of the wheel cylinder does not increase. HINT: If any output value increases, there may be brake fluid leaks in the brake actuator. NG --> See step 11 OK --> See step 12
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
REPLACE BRAKE BOOSTER PUMP. Refer to «REMOVAL»(ref-398212-S10797813252011051600000)

Note. When replacing the brake booster with master cylinder (brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When C1202/68, C1241/41, C1252/52, C1253/53 and/or C1391/69 are output together with C1256/56, inspect and repair the trouble areas indicated by C1202/68, C1241/41, C1252/52, C1253/53 and/or C1391/69 first. Refer to DTC C1202/68: Master Reservoir Level Malfunction . Refer to DTC C1241/41: Low Battery Positive Voltage; DTC C1242/42: Open in IG1 / IG2 Power Source Circuit . Refer to DTC C1252/52: Brake Booster Pump Motor on Time Abnormally Long; DTC C1253/53: Pump Motor Relay Malfunction , or. Refer to DTC C1391/69: Accumulator Leak Malfunction ).

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When C1241/41, C1242/42 and/or C1253/53 are output together with C1257/57, inspect and repair the trouble areas indicated by C1241/41, C1242/42 and/or C1253/53 first. Refer to DTC C1241/41: Low Battery Positive Voltage; DTC C1242/42: Open in IG1 / IG2 Power Source Circuit or. Refer to DTC C1252/52: Brake Booster Pump Motor on Time Abnormally Long; DTC C1253/53: Pump Motor Relay Malfunction ).

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 86

Scheme 86: PROCEDURE

Scheme 87

Scheme 88

PERFORM ACTIVE TEST USING TECHSTREAM (ABS MAIN RELAY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Test Part Control Range ECB* Main Relay ABS main relay Relay ON/OFF *: Electronically Controlled Brake System Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition ECB* Main Relay ABS main relay / ON or OFF ON: Relay on OFF: Relay off *: Electronically Controlled Brake System Check the operating condition of the ABS main relay when operating it with the Techstream. Result Result Proceed to ABS main relay in the Data List turns ON/OFF using the Active Test A ABS main relay in the Data List does not change using the Active Test B B --> See step 4 A: Go to next step
INSPECT SKID CONTROL ECU (BS TERMINAL) Turn the power switch off. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A60-15 (BS) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BS CIRCUIT) OK: Go to next step
RECONFIRM DTC Reconnect the skid control ECU connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (IG). Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTCs (C1311/11and C1312/12) are not output A DTCs (C1311/11 and/or C1312/12) are output B B --> See step 8 A --> See step 7
INSPECT ABS MAIN FUSES Turn the power switch off. Remove the ABS MAIN fuses from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ABS MAIN NO. 1 (20 A) fuse Always Below 1 ohms ABS MAIN NO. 2 (7.5 A) fuse Always Below 1 ohms TEXT IN ILLUSTRATION *1 Engine Room Relay Block *2 ABS MAIN NO. 1 Fuse *3 ABS MAIN NO. 2 Fuse NG --> REPLACE ABS MAIN FUSES OK: Go to next step
INSPECT SKID CONTROL ECU (BI TERMINAL) Install the ABS MAIN fuses. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A60-14 (BI) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BI CIRCUIT) OK: Go to next step
INSPECT SKID CONTROL ECU (BS TERMINAL) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A60-15 (BS) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BS CIRCUIT) OK --> See step 8
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)

Note. When replacing the brake booster with master cylinder (brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When C1451/72 is output together with C1345/66 and/or C1368/67, inspect and repair the trouble areas indicated by C1451/72 first. Refer to DTC C1451/72: Motor Drive Permission Malfunction .

Note. When replacing the brake booster with master cylinder (skid control ECU or brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

HINT

When C1249/49 is output together with C1380/64, inspect and repair the trouble areas indicated by C1249/49 first. Refer to DTC C1249/49: Open in Stop Light Switch Circuit .

Scheme 89

Scheme 89: PROCEDURE

Scheme 90

CHECK STOP LIGHT OPERATION Check that the stop lights come on when the brake pedal is depressed and go off when the brake pedal is released. OK Condition Illumination Condition Brake pedal depressed ON Brake pedal released OFF NG --> See step 11 OK: Go to next step
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Check that the stop light switch condition observed on the Techstream changes according to brake pedal operation. OK The Techstream displays ON or OFF according to brake pedal operation. NG --> See step 8 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (STOP LIGHT CONTROL RELAY) Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note Stop Light Relay Stop light control relay Relay ON/OFF Stop lights come on Perform the Active Test of the stop light control relay using the Techstream. Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Stop Light Relay Output Stop light control relay output / ON or OFF ON: Relay output on OFF: Relay output off Check for stop light control relay operation using the Data List and stop light operation by performing an Active Test. Result Result Proceed to Data List content and stop light operation are normal A Data List content is normal but stop lights do not turn on or off B B --> See step 6 A: Go to next step
INSPECT SKID CONTROL ECU (STP2 TERMINAL) Turn the power switch off. Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A60-6 (STP2) - Body ground Stop light switch ON (Brake pedal depressed) 11 to 14 V A60-6 (STP2) - Body ground Stop light switch OFF (Brake pedal released) Below 1.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STP2 CIRCUIT) OK: Go to next step
RECONFIRM DTC Reconnect the skid control ECU connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Turn the power switch on (READY). Perform a road test. Check if the same DTC is recorded. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC (C1380/64) is not output A DTC (C1380/64) is output B B --> See step 10 A --> See step 9
INSPECT STOP LIGHT CONTROL RELAY Inspect the stop light control relay. Refer to «INSPECTION»(ref-398250-S04543830972011051600000) . OK The stop light control relay is normal. NG --> See step 12 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT CONTROL RELAY) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Disconnect the skid control ECU connector and the stop light control relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-3 (STP0) - A7-9 (ACC) Always Below 1 ohms A60-3 (STP0) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
INSPECT SKID CONTROL ECU (STP TERMINAL) Turn the power switch off. Make sure that there is no looseness at the locking part and the connecting part of the connector. Disconnect the skid control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A60-33 (STP) - Body ground Stop light switch ON (Brake pedal depressed) 11 to 14 V A60-33 (STP) - Body ground Stop light switch OFF (Brake pedal released) Below 1.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) OK --> See step 10
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSPECT STOP LIGHT CIRCUIT. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398106-S06780682002011051600000)
REPLACE STOP LIGHT CONTROL RELAY. Refer to «REMOVAL»(ref-398250-S33206208202011051600000)

Note. When replacing the brake booster with master cylinder (brake actuator), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Note. Before proceeding with the inspection, explain to the customer that the output DTC is related to temporary loss of the steering angle zero calibration, such as when the power source voltage drops when the battery is removed, and confirm that this condition occurred.

HINT

When DTC U0073/94, U0123/62, U0124/95 and/or U0126/63 is output together with DTC C1439/66 and/or C1445/66, inspect and repair the trouble areas indicated by DTC U0073/94, U0123/62, U0124/95 and/or U0126/63 first. Refer to «DTC U0073/94: Control Module Communication Bus OFF; DTC U0123/62: Lost Communication with Yaw Rate Sensor Module; DTC U0124/95: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63: Lost Communication with Steering Angle Sensor Module; DTC U0293/59: Communication Error from HV ECU»(ref-398289-S17366503172011051600000) .
When the speed sensor or the yaw rate and acceleration sensor has trouble, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate and acceleration sensor are output together with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor first, and then inspect and repair the steering angle sensor.

Note. When replacing the yaw rate and acceleration sensor, perform zero point calibration. Refer to CALIBRATION .

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 91

Scheme 91: PROCEDURE

CHECK CAN COMMUNICATION SYSTEM Check if a CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 8 A: Go to next step
CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED Check if the skid control ECU connector is securely connected. OK The connector is securely connected. NG --> CONNECT CONNECTOR TO ECU CORRECTLY OK: Go to next step
CHECK AUXILIARY BATTERY Check the auxiliary battery voltage. Standard Voltage 11 to 14 V NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
INSPECT SKID CONTROL ECU (IG1 TERMINAL) Disconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A60-16 (IG1) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) OK: Go to next step
INSPECT SKID CONTROL ECU (GND TERMINAL) Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-28 (GND) - Body ground Always Below 1 ohms A60-27 (GND2) - Body ground Always Below 1 ohms A60-26 (GND3) - Body ground Always Below 1 ohms A60-25 (GND4) - Body ground Always Below 1 ohms A60-24 (GND5) - Body ground Always Below 1 ohms A60-23 (GND6) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
INSPECT COMBINATION METER Reconnect the skid control ECU connector. Perform the Active Test of the combination meter (meter CPU) using the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398239-S02790031422011051600000) . Check the combination meter. OK The ABS warning light turns on or off in accordance with the Techstream operation. HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> See step 9 OK --> See step 7
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
REPLACE COMBINATION METER. Refer to «REMOVAL»(ref-398236-S19518532552011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 92

CHECK DTC Check if a ABS, VSC and/or electronically controlled brake system DTC is output. Refer to «DTC CHECK / CLEAR»(ref-398097-S18517405762011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 13 A: Go to next step
CHECK CAN COMMUNICATION SYSTEM Check if a CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 14 A: Go to next step
CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED Check if the skid control ECU connector is securely connected. OK The connector is securely connected. NG --> CONNECT CONNECTOR TO ECU CORRECTLY OK: Go to next step
CHECK AUXILIARY BATTERY Check the auxiliary battery voltage. Standard Voltage 11 to 14 V NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
INSPECT SKID CONTROL ECU (IG1 TERMINAL) Disconnect the skid control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A60-16 (IG1) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) OK: Go to next step
INSPECT SKID CONTROL ECU (GND TERMINAL) Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-28 (GND) - Body ground Always Below 1 ohms A60-27 (GND2) - Body ground Always Below 1 ohms A60-26 (GND3) - Body ground Always Below 1 ohms A60-25 (GND4) - Body ground Always Below 1 ohms A60-24 (GND5) - Body ground Always Below 1 ohms A60-23 (GND6) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
READ VALUE USING TECHSTREAM (PARKING BRAKE SWITCH) Reconnect the skid control ECU connector. Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Parking Brake SW Parking brake switch / ON or OFF ON: Parking brake applied OFF: Parking brake released Using the Techstream, check if the switch condition on the Techstream changes according to parking brake operation. OK The Techstream displays ON or OFF according to parking brake operation. NG --> See step 9 OK: Go to next step
INSPECT COMBINATION METER Turn the power switch off. Perform the Active Test of the combination meter (meter CPU) using the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398239-S02790031422011051600000) . Check the combination meter. OK The brake warning light / red (malfunction) turns on or off in accordance with the Techstream operation. HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> See step 15 OK --> See step 11
INSPECT PARKING BRAKE SWITCH Turn the power switch off. Disconnect the parking brake switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 (+) - Body ground Parking brake switch ON (Switch pin free) Below 1 ohms 1 (+) - Body ground Parking brake switch OFF (Switch pin pushed in) 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Parking Brake Switch) NG --> See step 16 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARKING BRAKE SWITCH) Disconnect the main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2C-20 (PKB) - A24-1 (+) Always Below 1 ohms 2C-20 (PKB) - Body ground Always 10 kohms or higher HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398097-S01025085302011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
REPLACE COMBINATION METER. Refer to «REMOVAL»(ref-398236-S19518532552011051600000)
REPLACE PARKING BRAKE SWITCH. Refer to «REMOVAL»(ref-398282-S37962351212011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 93

Scheme 93: PROCEDURE

CHECK CAN COMMUNICATION SYSTEM Check if a CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 10 A: Go to next step
CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED Check if the skid control ECU connector is securely connected. OK The connector is securely connected. NG --> CONNECT CONNECTOR TO ECU CORRECTLY OK: Go to next step
CHECK AUXILIARY BATTERY Check the auxiliary battery voltage. Standard Voltage 11 to 14 V NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
READ VALUE USING TECHSTREAM (VSC OFF SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Data List on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition TRC(TRAC)/VSC OFF SW VSC OFF switch / ON or OFF ON: Switch on OFF: Switch off TRAC/VSC Off Mode VSC OFF switch / Normal, TRC OFF, Unknown or VSC OFF Normal: Normal mode TRC OFF: TRAC off mode Unknown: Unspecified VSC OFF: VSC off mode Using the Techstream, check the switch input and mode condition on the Techstream changes according to VSC OFF switch operation. Result Result Proceed to OK A NG (Switch input and mode condition display do not change.) B NG (Switch input is normal, but mode condition display does not change.) C C --> See step 8 B --> See step 6 A: Go to next step
INSPECT COMBINATION METER Turn the power switch off. Perform the Active Test of the combination meter (meter CPU) using the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398239-S02790031422011051600000) . Check the combination meter. OK The multi-information display turns on or off in accordance with the Techstream operation. HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> See step 11 OK --> See step 9
INSPECT VSC OFF SWITCH Turn the power switch off. Disconnect the VSC OFF switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 6 (+) - 7 (E) Switch is pushed in Below 1 ohms 6 (+) - 7 (E) Switch is not pushed in 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (VSC OFF Switch) NG --> See step 12 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH) Disconnect the skid control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-8 (CSW) - F10-6 (+) Always Below 1 ohms A60-8 (CSW) - Body ground Always 10 kohms or higher F10-7 (E) - Body ground Always Below 1 ohms HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
PERFORM ACTIVE TEST USING TECHSTREAM (MULTI-INFORMATION DISPLAY AND VSC OFF INDICATOR LIGHT) Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note TRAC OFF Indicator Light Multi-information display Display ON/OFF Observe combination meter VSC OFF Indicator Light VSC OFF indicator light Indicator light ON/OFF Observe combination meter Check that the multi-information display and VSC OFF indicator light on the combination meter turn on or off in accordance with the Techstream operation. OK The multi-information display and VSC OFF indicator light turn on or off in accordance with the Techstream operation. HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> See step 11 OK --> See step 9
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
REPLACE COMBINATION METER. Refer to «REMOVAL»(ref-398236-S19518532552011051600000)
REPLACE VSC OFF SWITCH. Refer to «REMOVAL»(ref-398283-S34720537422011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 94

Scheme 94: PROCEDURE

Scheme 95

CHECK BUZZER OPERATION Confirm problem symptoms of the skid control buzzer according to the customer problem analysis. HINT: If the buzzer stops after sounding continuously, a temporary drop in accumulator pressure is the suspected cause. Result Result Proceed to Buzzer does not sound A Buzzer sounds constantly B B --> See step 7 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the Active Test on the Techstream. Refer to «DATA LIST / ACTIVE TEST»(ref-398097-S36405419582011051600000) . ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note Buzzer Skid control buzzer Buzzer ON/OFF Buzzer can be heard Check that the buzzer sounds/stops when turning the skid control buzzer on/off using the Techstream. Result Result Proceed to Buzzer does not sound A Buzzer sounds/stops B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 11 A: Go to next step
INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL) Turn the power switch off. Disconnect the skid control buzzer connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F14-2 (IG1) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control Buzzer) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK: Go to next step
INSPECT SKID CONTROL BUZZER Turn the power switch off. Connect a negative (-) lead from the battery to terminal 1, and a positive (+) lead to terminal 2 of the skid control buzzer, and then check that the buzzer sounds. OK The skid control buzzer sounds. TEXT IN ILLUSTRATION *1 Component without harness connected (Skid Control Buzzer) NG --> See step 12 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER) Disconnect the skid control ECU connector 2 minutes after the power switch is turned off. HINT: Do not open/close the driver door within 2 minutes after the power switch is turned off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-13 (BZ) - F14-1 (BZ) Always Below 1 ohms A60-13 (BZ) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT SKID CONTROL ECU (GND TERMINAL) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A60-28 (GND) - Body ground Always Below 1 ohms A60-27 (GND2) - Body ground Always Below 1 ohms A60-26 (GND3) - Body ground Always Below 1 ohms A60-25 (GND4) - Body ground Always Below 1 ohms A60-24 (GND5) - Body ground Always Below 1 ohms A60-23 (GND6) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK --> See step 10
INSPECT SKID CONTROL ECU Disconnect the skid control ECU connector. Check that the skid control buzzer operation. Result Result Proceed to Buzzer stops A Buzzer sounds constantly B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 8 A --> See step 10
REPLACE SKID CONTROL BUZZER Reconnect the skid control ECU connector. Replace the skid control buzzer. Refer to «REMOVAL»(ref-398283-S33635379942011051600000) . Check that the skid control buzzer operation. Result Result Proceed to Buzzer stops A Buzzer sounds constantly B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> See step 9 A --> END
CHECK IF CONNECTOR IS SECURELY CONNECTED Gently jiggle the connectors and wire harnesses and check the skid control buzzer operation. Result Result Proceed to Buzzer stops A Buzzer sounds constantly B HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . B --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> END
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
REPLACE SKID CONTROL BUZZER. Refer to «REMOVAL»(ref-398283-S33635379942011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Scheme 96

Scheme 96: PROCEDURE

Scheme 97

CHECK CAN COMMUNICATION SYSTEM Check if a CAN communication system DTC is output. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000) . Result Result Proceed to DTC is not output A DTC is output B B --> See step 6 A: Go to next step
CHECK HARNESS AND CONNECTOR (TC of DLC3 - HYBRID VEHICLE CONTROL ECU) Disconnect the hybrid vehicle control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F11-13 (TC) - A58-33 (TC) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F11-4 (CG) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of DLC3 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F11-13 (TC) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of DLC3 HINT: If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398097-S13184429062011051600000) . NG --> REPAIR OR REPLACE WIRE HARNESS OR EACH ECU OK --> See step 5
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER. Refer to «REMOVAL»(ref-398212-S42415717782011051600000)
INSPECT CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)

Note. When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve. Refer to INITIALIZATION .

Electronically Controlled Brake (Diagnostic Codes & Symptom Tests): Diagnosis Lexus HS I

INSPECTION PROCEDURE

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