CHECK FOR INTERMITTENT PROBLEMS
1. CHECK FOR INTERMITTENT PROBLEMS
HINT:
A momentary interruption (open circuit) in the connectors and/or wire harness 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 interruption should be monitored.
HINT:
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
EFI Communication Open |
EFI communication open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
Yaw Rate Open |
Yaw rate sensor open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
Deceleration Open |
Acceleration sensor open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
Steering Open |
Steering angle sensor open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
IG Voltage Value Decreased |
IG voltage value decrease detection / Error or Normal |
Error: Decrease Normal: Normal |
- |
FR Speed Sensor Voltage Open |
Front speed sensor RH voltage open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
FL Speed Sensor Voltage Open |
Front speed sensor LH voltage open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
RR Speed Sensor Voltage Open |
Rear speed sensor RH voltage open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
RL Speed Sensor Voltage Open |
Rear speed sensor LH voltage open detection / Error or Normal |
Error: Momentary interruption Normal: Normal |
- |
(f) While observing the screen, gently jiggle the connector or wire harness between the ECU 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 connector and/or wire harness as one of them is faulty.
Air Outlet Damper Control Servo Motor Circuit (B1443/43)
DESCRIPTION
The air outlet control servo motor sends pulse signals to indicate the damper
position to the A/C amplifier. The A/C amplifier activates the motor (normal or
reverse) based on these signals to move the mode damper to any position, which contro ...
Transfer System
Precaution
PRECAUTION
Prior to starting any work, clean the transfer assembly to prevent sand
or mud deposits from entering the assembly.
When removing any light alloy components such as the transfer cover,
do not pry on the component wi ...
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MONITOR DESCRIPTION
The main CPU and sub CPU of the ECM perform data communication between each other.
The main CPU monitors the communications and WDC pulses from the sub CPU. When the
signal malfunctions below are detected, the DTC is output.
...