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Anti-Lock: Other Lexus GS II рестайлинг

Anti-Lock/traction Control 8 illustrations ~1466 words

BLEEDING BRAKE SYSTEM

CAUTIONWash off brake fluid immediately if it comes into contact with a painted surface.

Note. If any work is done on brake system or if air in brake lines is suspected, bleed air from the system. When bleeding, keep the amount of fluid within the line of reservoir between Min. and Max. Use only SAE J1703 or FMVSS No. 116 DOT 3 brake fluid.

Note. If hydraulic brake booster has been disassembled or if reservoir becomes empty, bleed hydraulic brake booster. See HYDRAULIC BRAKE BOOSTER .

BRAKE LINE

  1. Fill reservoir with brake fluid.
  2. Connect a vinyl tube to bleeder screw on brake caliper and place the other end in a clear jar.
  3. Depress brake pedal several times, then loosen bleeder screw with pedal held down.
  4. At the point when fluid stops coming out, tighten bleeder screw to specification. See «TORQUE SPECIFICATIONS»(ref-153594-S36295261152003041500000) .
  5. Release brake pedal. Repeat 3 and 4 until all air in fluid has been bled out.
  6. Repeat procedure to bleed air out of the brake line for each wheel.

HYDRAULIC BRAKE BOOSTER

Note. If the hydraulic brake booster has been disassembled, brake lines disconnected from the hydraulic brake booster, or if reservoir becomes empty, bleed hydraulic brake booster.

With ABS Actuator Checker

  1. Disconnect hydraulic brake booster harness connectors. (Scheme 92)
  2. Connect the connector with label of "AIR BLEED" attached to connector of actuator checker (09990-00150/00480), to hydraulic brake booster side wire harness via sub-wire harness. (Scheme 93)
  3. Connect red cable of checker to battery positive terminal and black cable to negative terminal.
  4. Turn ignition switch off. Depress brake pedal more than 40 times. When pressure in power supply system is released, reaction force becomes light and stroke becomes longer.
  5. Turn ignition switch to ON and check that pump stops after 30-40 seconds. If pump does not stop, repeat 4.
  6. With the ignition switch on depress brake pedal more than 20 times. Hold pedal depressed and bleed right and left front wheel calipers. See «BRAKE LINE»(ref-153594-S37422721662003041500000).
  7. Hold brake pedal depressed and bleed right and left rear wheel calipers. See «BRAKE LINE»(ref-153594-S37422721662003041500000).
  8. Turn selector switch of actuator checker to "FRONT RH" position. Push and hold in MAIN push switch, depress brake pedal and hold it to bleed right front brake caliper. Repeat until there are no more air bubbles in fluid.
  9. Turn selector switch of actuator checker to "FRONT LH" position. Push and hold in MAIN push switch, depress brake pedal and hold it to bleed left front brake caliper. Repeat until there are no more air bubbles in the fluid.
  10. Push and hold in "SUB LH" and "SUB RH" switches and bleed right rear brake caliper. Repeat until there are no more air bubbles in fluid.
  11. Push and hold in "SUB LH" and "SUB RH" switches and bleed left rear brake caliper. Repeat until there are no more air bubbles in fluid.
  12. Disconnect actuator checker and sub-wire harness from actuator.
  13. Connect hydraulic brake booster harness connectors.
  14. Clear DTCs. See «CLEARING CODES»(ref-153594-S34192553842003041500000) under SELF-DIAGNOSTIC SYSTEM.

Scheme 92

Scheme 92
Scheme 92

Scheme 93

Scheme 93
Scheme 93

With Hand-Held Tester

Note. Refer to LEXUS hand-held tester operator's manual for further details.

  1. Turn ignition switch off. Connect LEXUS hand-held tester to (DLC3). (Scheme 94)
  2. Turn ignition switch on and select AIR BLEEDING on hand-held tester.
  3. Select FR LINE, turn on hand-held tester, depress brake pedal and hold it to bleed right front brake caliper. Repeat until there are no more air bubbles in fluid.
  4. Select FL LINE, turn on hand-held tester, depress brake pedal and hold it to bleed left front brake caliper. Repeat until there are no more air bubbles in fluid.
  5. Select "RR LINE", turn on hand-held tester and bleed left and right rear brake calipers.
  6. Disconnect hand-held tester from (DLC3) and clear the DTC. See «CLEARING CODES»(ref-153594-S34192553842003041500000) under SELF-DIAGNOSTIC SYSTEM.

Scheme 94

Scheme 94
Scheme 94

Without Hand-Held Tester

  1. Turn ignition switch off. Depress the brake pedal more than 40 times.
  2. Turn ignition switch on and check that pump stops after 30-40 seconds.
  3. If pump does not stop, repeat 1 and 2 .
  4. With ignition switch on, depress brake pedal more than 20 times.
  5. Depress brake pedal, hold it and bleed all four brake calipers. See «BRAKE LINE»(ref-153594-S37422721662003041500000) .

PRE-CHECK

  1. Release the parking brake pedal.
  2. Turn ignition switch is on. Check that ABS and BRAKE warning lights turn on for 3 seconds. Depressing brake pedal repeatedly may turn on warning lights. (Scheme 95)
  3. If the indicator check result is not normal, see appropriate test under «SYSTEM TESTING»(ref-153594-S29160478282003041500000).

Scheme 95

Scheme 95
Scheme 95
  1. Connect hand-held tester to the (DLC3). (Scheme 94)
  2. Read the DTC by following the prompts on the tester screen. If any DTCs are retrieved, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-153594-S38389427502003041500000).
  3. Please refer to hand-held tester operator's manual for further details.
  1. Disconnect short pin from (DLC1). (Scheme 96)
  2. Using special tool (09843-18020), jumper between terminals Tc and E 1 of (DLC1). (Scheme 97)
  3. Turn ignition switch to ON. Read DTCs from ABS warning light flashing patterns on combination meter. For flashing patterns of normal and codes 11 and 21 (Scheme 98)
  4. If any DTCs are retrieved, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-153594-S38389427502003041500000).
  5. If 2 or more DTCs are indicated at the same time the lowest numbered DTC will be displayed first.
  6. If no DTCs are stored in memory, inspect the diagnostic circuit or ABS warning light circuit. Perform appropriate test under «SYSTEM TESTING»(ref-153594-S29160478282003041500000).
  7. After completing the check, disconnect jumper wire and install short pin.

Scheme 96

Scheme 96
Scheme 96

Scheme 97

Scheme 97
Scheme 97

Scheme 98

Scheme 98
Scheme 98

CLEARING CODES

Note. Disconnecting battery cable during repairs will not erase DTCs in ABS ECU.

  1. Connect LEXUS hand-held tester to (DLC3). Turn ignition on. (Scheme 94)
  2. Follow hand-held tester manufacturers instructions to erase DTCs.
  1. Using special tool (09843-18020), jumper between terminals Tc and E 1 of (DLC1). (Scheme 97)
  2. Remove short pin from (DLC1). (Scheme 96)
  3. Turn ignition switch on. Clear DTCs stored in ABS ECU by depressing brake pedal 8 or more times within 5 seconds.
  4. Check that warning light flashes the normal code. (Scheme 98) Remove special tool from (DLC1).
  5. Connect short pin to (DLC1).

LEXUS Break-Out-Box & LEXUS Hand-Held Tester

The LEXUS break-out-box and LEXUS hand-held tester can measure ABS ECU terminal values. The LEXUS hand-held tester has a "Snapshot" function. This records the measured values and is effective in the diagnosis of intermittent problems. Please refer to LEXUS hand-held tester/LEXUS break-out-box operator's manual for further details.

  1. Turn ignition switch off. Connect LEXUS break-out-box and LEXUS hand-held tester to vehicle. (Scheme 99)
  2. Turn ignition switch on. Read ABS ECU input-output values by following prompts on tester screen.

Scheme 99

Scheme 99
Scheme 99
  1. Connect LEXUS hand-held tester to (DLC3). (Scheme 94)
  2. Start engine and check that ABS warning light flashes. If ABS warning light does not flash, inspect ABS warning light circuit and Ts circuit. See «TEST B: ABS WARNING LIGHT CIRCUIT»(ref-153594-S35243810482003041500000) and «TEST H: TS TERMINAL CIRCUIT»(ref-153594-S37068724512003041500000).
  3. If the ABS warning light flashes, leave vehicle condition and brake pedal in free condition for one second or more. Depress brake pedal for one second or more with at least 22 ft.lbs. (98 N.m) of force.
  4. Leaving vehicle in stationary condition, depress brake pedal quickly with 221 ft.lbs. (980 N.m) of force. At this time the ABS warning light comes on for 3 seconds.
  5. Drive vehicle straight forward at speeds of 28 mph or more for several seconds. Check that ABS warning light turns off.
  6. Stop vehicle. Read the DTC by following prompts on tester screen. Refer to the hand-held tester operator's manual for further details. If any DTCs are retrieved, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-153594-S38389427502003041500000).

Without Hand-Held Sensor

  1. Turn ignition switch off.
  2. Using special tool (09843-18020), jumper between terminals Ts and E 1 of (DLC1). (Scheme 97)
  3. Start engine and check that ABS warning light flashes. If ABS warning light does not flash, inspect ABS warning light circuit and Ts circuit. See «TEST B: ABS WARNING LIGHT CIRCUIT»(ref-153594-S35243810482003041500000) and «TEST H: TS TERMINAL CIRCUIT»(ref-153594-S37068724512003041500000).
  4. If ABS warning light flashes, leave vehicle condition and brake pedal in free condition for one second or more. Depress brake pedal for one second or more with at least 22 ft.lbs. (98 N.m.) of force.
  5. Leaving vehicle in stationary condition, depress brake pedal quickly with 221 ft.lbs. (980 N.m.) of force. At this time the ABS warning light comes on for 3 seconds.
  6. Drive vehicle straight forward at speed of 28 mph or more for several seconds. Check that ABS warning light turns off.
  7. Stop the vehicle. Using special tool (09843-18020), jumper between terminals Tc and E 1 of (DLC1). (Scheme 97)
  8. Read the number of flashes of ABS warning light. If any DTCs are retrieved, perform appropriate test. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-153594-S38389427502003041500000).
  9. If all speed sensors are normal, a normal code is output. (Scheme 98)
  10. If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed first.
  11. Turn ignition switch off and remove special tools from (DLC1).

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