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.
Motor Circuit Malfunction (C1522-C1555)
DESCRIPTION
The power steering ECU supplies current to the power steering motor through the
motor circuit.
DTC No.
DTC Detection Condition
Trouble Area
C1522
Motor current sensor malfunction
...
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