Cruise Control Switch Circuit: Procedure
- READ VALUE USING TECHSTREAM
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Radar Cruise / Data List.
- Check the Data List for proper functioning of the cruise control main switch.RADAR CRUISE (ECM)
Techstream Display Measurement Item/Range Normal Condition Diagnostic Note Main SW M-CPU Main switch signal (Main CPU)/ON or OFF ON: Main switch ON
OFF: Main switch OFF- Cancel Switch CANCEL switch signal/ON or OFF ON: CANCEL switch ON
OFF: CANCEL switch OFF- SET/COAST Switch SET/COAST switch signal/ON or OFF ON: - (COAST)/SET switch ON
OFF: - (COAST)/SET switch OFF- RES/ACC Switch RES/ACC switch signal/ON or OFF ON: + (ACCEL)/RES (RESUME) switch ON
OFF: + (ACCEL)/RES (RESUME) switch OFF- OK
When the cruise control main switch is operated, the display changes as shown above.
Result
Result Proceed to OK A NG (all items are defective) B NG (1 to 3 items are defective) C
C → See step 8
B → See step 2
A → See step 7
- INSPECT CRUISE CONTROL MAIN SWITCH
- Remove the cruise control main switch. Refer to COMPONENTS .
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition 1 (ECC) - 2 (R/N)
1 (ECC) - 3 (CCS)Main Switch off*1 1 MΩ or higher 1 (ECC) - 3 (CCS) Main switch on Below 2.5 Ω 1 (ECC) - 2 (R/N) MODE Below 2.5 Ω 1 (ECC) - 3 (CCS) + RES 235 to 245 Ω 1 (ECC) - 3 (CCS) - SET 617 to 643 Ω 1 (ECC) - 3 (CCS) CANCEL 1509 to 1571 Ω *1: Lever is in the neutral position
NG → See step 8
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - CRUISE CONTROL MAIN SWITCH)
- Disconnect the m1 connector from the spiral cable.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A-1 (ECC) - m1-4 (ECC) Always Below 1 Ω A-2 (R/N) - m1-1 (R/N) Always Below 1 Ω A-3 (CCS) - m1-3 (CCS) Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT SPIRAL CABLE NOTE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Refer to HINT below.
HINT:
- Spiral cable removal. Refer to REMOVAL
- Spiral cable installation. Refer to INSTALLATION
- Remove the spiral cable. Refer to COMPONENTS .
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition m1-1 (R/N) - J24-7 (R/N) The spiral cable position is center Below 1 Ω The spiral cable position is 2.5 rotations to the left The spiral cable position is 2.5 rotations to the right m1-3 (CCS) - J24-1 (CCS) The spiral cable position is center Below 1 Ω The spiral cable position is 2.5 rotations to the left The spiral cable position is 2.5 rotations to the right m1-4 (ECC) - J24-2 (ECC) The spiral cable position is center Below 1 Ω The spiral cable position is 2.5 rotations to the left The spiral cable position is 2.5 rotations to the right HINT:
The spiral cable makes a maximum of approximately 5 rotations.
NG → See step 9
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM, BODY GROUND)
- Disconnect the A5 and A6 connectors from the ECM.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition J24-1 (CCS) - A6-15 (CCS) Always Below 1 Ω J24-7 (R/N) - A5-17 (CCHG) Always Below 1 Ω J24-1 (CCS) - Body ground Always 10 kΩ or higher J24-7 (R/N) - Body ground Always 10 kΩ or higher J24-2 (ECC) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 6
- REPLACE ECM (for 2UR-GSE). Refer to COMPONENTS
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- REPLACE CRUISE CONTROL MAIN SWITCH. Refer to COMPONENTS
- REPLACE SPIRAL CABLE. Refer to COMPONENTS