CHECK FOR INTERMITTENT PROBLEMS
1. DESCRIPTION
HINT:
A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected through the ECU data monitor 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) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
(f) 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 |
Acceleration 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 |
- |
IG Voltage Value Decreased |
IG1 voltage value decreased detection/ Error or Normal |
Normal |
- |
IG Voltage Value Increased |
IG1 voltage value increased 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 |
- |
(g) While observing the screen, gently jiggle the connectors or wire harnesses between the ECUs and sensors or between ECUs.
OK:
Normal display appears.
HINT:
The connector and/or wire harness has a momentary interruption (open circuit) if the display changes. Repair or replace the connectors and/or wire harnesses as one of them is faulty.
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal.
Therefore, make sure to read the disconnecting the cable from the negative (-)
battery terminal notices before p ...
Open or Short in Master Cylinder Pressure Sensor (C1421,C1423,C1424,C142A,C1449)
DESCRIPTION
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1421
Open or Short in Master Cylinder Pressure Sensor
Any of the following is detected:
When voltage at terminal +BS is 9.5 V or ...
Torque Converter Clutch Pressure Control Solenoid Control Circuit Open (P275613)
DESCRIPTION
Refer to the system description for DTC P27567F (See page
).
DTC No.
DTC Detection Condition
Trouble Area
SAE
P275613
Open or short is detected in shift solenoid valve SLU circuit for 1 second
or more while d ...