A340E Automatic Transmission - Troubleshooting Flow-Chart - Toyota Hilux Surf 1993 Owner's Manual

TROUBLESHOOTING FLOW–CHART
HINT:
• If diagnostic trouble code Nos. 42, 61, 62 or 63 are output, the overdrive OFF indicator light will
begin to blink immediately to warn the driver. However, an impact or shock may cause the blinking
to stop; but the code will still be retained in the ECM memory until canceled out.
• There is no warning for diagnostic trouble code No. 64.
• In the event of a simultaneous malfunction of both No. 1 and No. 2 vehicle speed sensors, no diag–
nostic trouble code will appear and the fail–safe system will not function. However, when driving in
the D position, the transmission will not up–shift from first gear, regardless of the vehicle speed.
Diagnostic trouble code 42 (No. 1 vehicle speed sensor circuitry)
Check continuity between ECM connector SP,
terminal and body ground.
(See page AT–71)
Substitute another ECM.
Check No. 1 vehicle speed sensor.
(See page AT–73)
Check wiring between ECM and combination
meter.
Diagnostic trouble code 61 (No.2 vehicle speed sensor circuitry)
Check continuity between ECM connector SP
terminal and body ground.
(See page AT–71)
Substitute another ECM.
Check No.2 vehicle speed sensor.
(See page AT–73)
Check wiring between ECM and No.2 vehicle
speed sensor.
AUTOMATIC TRANSMISSION
2
– Troubleshooting (Diagnosis System)
Repair or replace No. 1 vehicle speed sensor.
Repair or replace No.2 vehicle speed sensor.
AT–57