Cressida L6-3.0L DOHC (7M-GE) (1989)
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Instrument Panel Circuit Board: Technical Service Bulletins
Speed Sensor - Modification
REF:
ELECTRICAL
NO.:
EL92-002 (REVISED)
DATE:
APRIL 10, 1992
MODEL:
MX
# 1 SPEED SENSOR REVISED
This TSB supersedes 92002, dated 2/7/92.
The Cressida (MX83E) Speed Sensor # 1 has been modified to reduce electrical noise.
^
Service parts (speedometer) for early production vehicles ('89 - '90 MY) have an improved designed reed switch (Speed Sensor # 1). The part
number has been changed for easy identification.
^
Vehicles built after 7/91 (late '91 MY) received a production change to the # 1 Speed Sensor and Instrument Cluster Printed Circuit. These
changes involved the following:
-
Addition of a filter circuit on the Instrument Cluster Printed Circuit for the # 1 Speed Sensor.
-
Reduction in operating voltage of the reed switch contained in the speedometer to reduce contact pitting.
^
1991 model year vehicles built prior to the 7/91 production change can be retro-fitted with the above improvement. This requires replacement of
both the # 1 Speed Sensor and the Instrument Cluster Printed Circuit.
# 1 SPEED SENSOR
FUNCTION OF # 1 SPEED SENSOR
The # 1 Speed Sensor operating function:
Primary Signal
Back-up Signal
^
Cruise Control
^
ECT-A/TM
^
Engine ECU
PRODUCTION EFFECTIVE:
FROM VIN
P/D
