CHECK FOR INTERMITTENT PROBLEMS
1. CHECK FOR INTERMITTENT PROBLEMS
HINT:
A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using the ECU Data List function of the Techstream.
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Follow the directions on the Techstream to display the Data List and select areas where momentary interruptions should be monitored.
HINT:
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
FR Speed Open |
Front speed sensor RH open circuit detection/ Error or Normal |
Normal |
- |
FL Speed Open |
Front speed sensor LH open circuit detection/ Error or Normal |
Normal |
- |
RR Speed Open |
Rear speed sensor RH open circuit detection/ Error or Normal |
Normal |
- |
RL Speed Open |
Rear speed sensor LH open circuit detection/ Error or Normal |
Normal |
- |
EFI Communication Open |
ECM communication open circuit detection/ Error or Normal |
Normal |
- |
Yaw Rate Open |
Yaw rate and acceleration sensor open circuit detection/ Error or Normal |
Normal |
- |
Deceleration Open |
Deceleration sensor open circuit detection/ Error or Normal |
Normal |
- |
Steering Open |
Steering angle sensor open circuit detection/ Error or Normal |
Normal |
- |
Master Cylinder Open |
Master cylinder pressure sensor open circuit detection/ Error or Normal |
Normal |
- |
FR Speed Sensor Voltage Open |
Front speed sensor RH voltage open circuit detection/ Error or Normal |
Normal |
- |
FL Speed Sensor Voltage Open |
Front speed sensor LH voltage open circuit detection/ Error or Normal |
Normal |
- |
RR Speed Sensor Voltage Open |
Rear speed sensor RH voltage open circuit detection/ Error or Normal |
Normal |
- |
RL Speed Sensor Voltage Open |
Rear speed sensor LH voltage open circuit detection/ Error or Normal |
Normal |
- |
M/C Pressure Sensor Noise |
Master cylinder pressure sensor noise detection/ Error or Normal |
Normal |
- |
Yaw Rate Sensor Voltage Open |
Yaw rate and acceleration sensor voltage open circuit detection/ Error or Normal |
Normal |
- |
EFI Communication Invalid |
ECM communication invalid detection/ Error or Normal |
Normal |
- |
Master Cylinder Pressure Sensor Power Supply Open |
Master cylinder pressure sensor power supply voltage status/ Error or Normal |
Normal |
- |
Solenoid Power Supply Open |
Solenoid power supply voltage status/ Error or Normal |
Normal |
- |
Motor Power Supply Open |
Motor power supply voltage status/ Error or Normal |
Normal |
- |
Stop Switch Open |
Momentary interruption (open circuit) status in wire harness between skid control ECU (brake actuator assembly) and stop light switch assembly status/ Error or Normal |
Normal |
- |
(f) While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.
OK:
Normal is displayed.
HINT:
If the display changes, the connector and/or the wire harness has caused a momentary interruption of the circuit. Repair or replace the connector and/or wire harness as one of them is faulty.
Open or Short in Front Speed Sensor RH Circuit (C1405,C1406)
DESCRIPTION
Refer to DTCs C1401 and C1402 (See page ).
DTC Code
DTC Detection Condition
Trouble Area
C1405
C1406
Either condition is met:
An open in the speed sensor signal circuit continues for 0.5
seconds or mor ...
Engine
General Maintenance
GENERAL MAINTENANCE
CAUTION / NOTICE / HINT
HINT:
Inspect these items when the engine is cold.
PROCEDURE
1. REPLACE CHAIN SUB-ASSEMBLY
HINT:
2TR-FE: See page
2GR-FKS: See page
2. INSPECT DRIVE BELT
HINT:
2TR-FE: See page
2GR-FKS: ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Perform the following procedure to troubleshoot the dynamic radar cruise
control system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
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