Problem Symptoms Table

Proceed with troubleshooting of each circuit in the table below.

Symptom

Suspect Area

See page

• With the ignition switch in ACC or ON position, the SRS warning light sometimes lights up after approx. 6 seconds have elapsed.

• SRS warning light circuit

DI-490

• SRS warning light is always lit up even when ignition switch is in the LOCK position.

• With the ignition switch in ACC or ON position, the SRS warning light does not light up.

• DTC is not displayed.

• Tc terminal circuit

DI-496

• SRS warning light is always lit up at the time of DTC check procedure.

• DTC is displayed without Tc and E1 terminal connection.

DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM_

DI1G3-09

PRE-CHECK

1. DIAGNOSIS SYSTEM

(a) Check the indicator.

When the ignition switch is turned ON, check that the ABS warning light goes on for 3 seconds.

HINT:

If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit (See page DI-250 ).

w/o Tachometer: w/ Tachometer:

w/o Tachometer: w/ Tachometer:

Abs Warning Indicator09843 18020

(1) Using SST, connect terminals Tc and E1 of DLC1 or Tc and CG of DLC3.

SST 09843-18020 or 09843-18040

(2) Turn the ignition switch ON.

(3) Read the DTC from the ABS warning light on the combination meter.

HINT:

• If no code appears, inspect the diagnostic circuit or ABS warning light circuit (See page DI-252 or DI-250 ).

Normal Code

ON 1

Code 11 and 21

1 5 sec

Code 11 Code 21

• As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.

(4) Codes are explained in the code table on page DI-223 .

(5) After completing the check, disconnect terminals Tc and E1 of DLC1 or Tc and CG of DLC3, and turn off the display.

If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed 1st.

Toyota Sst 09843 18040

(1) Using SST, connect terminals Tc and E1 of DLC1 or Tc and CG of DLC3.

SST 09843-18020 or 09843-18040

(2) Turn the ignition switch ON.

(3) Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.

(4) Check that the warning light shows the normal code.

(5) Remove the SST from the terminals of DLC1 or DLC3.

SST 09843-18020 or 09843-18040

Toyota 09843 18040

2. SPEED SENSOR SIGNAL CHECK

(a) Turn the ignition switch OFF.

(b) Using SST, connect terminals Ts and E1 of DLC1. SST 09843-18020

(c) Start the engine.

0.13 sec.

0.13 sec.

ON -

OFF J U U U

BR3904

(d) Check that the ABS warning light blinks. HINT:

If the ABS warning light does not blink, inspect the ABS warning light circuit (See page DI-250 ).

(e) Drive vehicle straight forward.

Drive vehicle faster than 45 km/h (28 mph) for several seconds.

(f) Stop the vehicle.

(g) Using SST, connect terminals Tc and E1 of DLC1 or Tc and CG of DLC3.

SST 09843-18020 or 09843-18040

(h) Read the number of blinks of the ABS warning light. HINT:

See the list of DTC on next page.

If every sensor is normal, a normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated). If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.

Malfunction Code (Example Code 72, 7e) 7 2 7

ON OFF

U1UU

Repeat

BR3S93

(i) After checking, disconnect terminals of DLC1 or terminals of DLC1 and DLC3, and turn the ignition switch OFF.

DTC of speed sensor check function:

Code No.

Diagnosis

Trouble Area

71

Low output voltage of right front speed sensor

• Right front speed sensor

• Right front speed sensor rotor

• Sensor installation

72

Low output voltage of left front speed sensor

• Left front speed sensor

• Left front speed sensor rotor

• Sensor installation

73

Low output voltage of right rear speed sensor

Right rear axle hub

74

Low output voltage of left rear speed sensor

Left rear axle hub

75

Abnormal change in output voltage of right front speed sensor

Right front speed sensor rotor

76

Abnormal change in output voltage of left front speed sensor

Left front speed sensor rotor

77

Abnormal change in output voltage of right rear speed sensor

Right rear axle hub

78

Abnormal change in output voltage of left rear speed sensor

Left rear axle hub

DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM_

DI1MZ-15

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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Responses

  • Sebastian
    How to read abs "codes" on toyota landcruiser?
    8 years ago
  • neftalem
    How to connect a tachometer on toyota 1997?
    7 years ago
  • kate
    What is toyota w for on the dlc1?
    3 years ago

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