Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING Intelligent tester OR TECHSTREAM (CRUISE CONTROL SWITCH)
- Check the DATA LIST for proper functioning of the cruise control switch.
- Intelligent tester
CCS
DIAGNOSTIC NOTE NORMAL CONDITION CHARTTester Display Measurement Item/Range Normal Condition MAIN SW (MAIN) Cruise control switch signal (Main CPU)/ON or OFF ON Cruise control switch is ON
OFF Cruise control switch is OFFCANCEL SW Cancel switch signal / ON or OFF ON CANCEL switch is ON
OFF CANCEL switch is OFFSET/COAT SW -/SET switch signal / ON or OFF ON -/SET switch is ON
OFF -/SET switch is OFF.RES/ACC SW +/RES switch signal / ON or OFF ON +/RES switch is ON
OFF +/RES switch is OFF - Techstream Cruise Control
Cruise Control
DIAGNOSTIC NOTE NORMAL CONDITION CHARTTester Display Measurement Item/Range Normal Condition Main SW M-CPU Cruise control switch signal (M-CPU)/ON or OFF ON Cruise control switch is ON
OFF Cruise control switch is OFFCancel Switch Cancel switch signal / ON or OFF ON CANCEL switch is ON
OFF CANCEL switch is OFFSET/COAT Switch -/SET switch signal / ON or OFF ON -/SET switch is ON
OFF -/SET switch is OFFRES/ACC Switch +/RES switch signal / ON or OFF ON +/RES switch is ON
OFF +/RES switch is OFF - Intelligent tester
OK: When cruise control switch operation is performed, the results are the same as above.
NG: Go to step 2
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE ).
- Check the DATA LIST for proper functioning of the cruise control switch.
- INSPECT CRUISE CONTROL SWITCH
- Remove the cruise control switch (see REMOVAL ).
- Measure the resistance according to the value (s) in the table below
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Switch Condition Specified Condition 1 - 3 Cruise control switch ON Below 2.5 Ω 1 - 3 Cruise control switch OFF 1 MΩ or higher 1 - 3 +/RES switch hold ON 235 to 245 Ω 1 - 3 -/SET switch hold ON 617 to 643 Ω 1 - 3 CANCEL switch hold ON 1509 to 1571 Ω NG: REPLACE CRUISE CONTROL SWITCH (See REMOVAL ).
OK: Go to next step
- INSPECT SPIRAL CABLE SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the z2 wire connector.
- Disconnect the L24 cable connector.
- Measure the resistance according to the value (s) in the table below
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition z2-3 - L24-1 (CCS) Always Below 3 Ω z2-4 - L24-2 (ECC) Always Below 3 Ω z2-3 - Body ground Always 10 kΩ or higher z2-4 - Body ground Always 10 kΩ or higher NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY (See REMOVAL ).
OK: Go to next step
- INSPECT CRUISE CONTROL SWITCH WIRE
- Disconnect the z2 cable connector.
- Disconnect the A switch connector.
- Measure the resistance according to the value (s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition z2-3 - A-3 Always Below 1 Ω 22-4 - A-1 Always Below 1 Ω A-3 - Body ground Always 10 kΩ or higher A-1 - Body ground Always 10 kΩ or higher Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE CRUISE CONTROL SWITCH WIRE
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - HYBRID VEHICLE CONTROL ECU AND BODY GROUND)
- Disconnect the L24 cable connector.
- Disconnect the A74 ECU connector.
- Measure the resistance according to the value (s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition L24-1 (CCS) - A74-35 (CCS) Always Below 1 Ω L24-2 (ECC) - Body ground Always Below 1 Ω L24-1 (CCS) - Body ground Always 10 kΩ or higher
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE HYBRID VEHICLE CONTROL ECU (See REMOVAL ).