Connector Handling; Continuity Check (Open Circuit Check); Resistance Check (Short Circuit Check); Visual Check And Contact Pressure Check - Toyota Tundra 2005 Service - Repair - Maintenance

Sensor Side
ECU Side
Sensor Side
ECU Side
Sensor Side
Looseness of Crimping
INTRODUCTION
2.
When inserting tester probes into a connector, insert them from
the rear of the connector. When necessary, use mini test leads.
For water resistant connectors which cannot be accessed from
behind, take good care not to deform the connector terminals.
FI7187
3.
ECU Side
(a)
(b)
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
IN0379
IN0378
4.
(a)
(b)
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
IN0380
5.
(a)
(b)
(c)
Pull Lightly
HINT:
The terminals should not come out when pulled lightly from the
back.
IN0381
− HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS

CONNECTOR HANDLING

CONTINUITY CHECK (OPEN CIRCUIT CHECK)

Disconnect the connectors at both ECU and sensor
sides.
Measure the resistance between the applicable terminals
of the connectors.
Resistance: Below 1 Ω

RESISTANCE CHECK (SHORT CIRCUIT CHECK)

Disconnect the connectors on both ends.
Measure the resistance between the applicable terminals
of the connectors and body ground. Be sure to carry out
this check on the connectors on both ends.
Resistance: 10 kΩ or higher

VISUAL CHECK AND CONTACT PRESSURE CHECK

Disconnect the connectors at both ends.
Check for rust or foreign material, etc. in the terminals of
the connectors.
Check crimped portions for looseness or damage and
check that the terminals are secured in the lock portion.
IN−31