Toyota 4-Runner 1985 Repair Manual page 291

IG-6 IGNITION SYSTEM - On-Vehicle Inspection
INSPECTION OF IGNITER
1. TURN IGNITION SWITCH ON
2. CHECK POWER SOURCE LINE VOLTAGE
(a) Disconnect the wiring connector for brown wire and
yellow wire.
(b) Using a voltmeter, connect the positive
(+)
probe to
the brown wire for the wire harness side and the nega-
tive (-) probe to body ground.
Voltage: Approx. 12 V
3. CHECK POWER TRANSISTOR IN IGNITER
(a) Connect the wiring connector for brown wire and yel-
low wire.
(b) Using a voltmeter, connect the positive
(+)
probe
the yellow wire for the igniter side and the negative
(-) probe to body ground.
Voltage: Approx. 12 V
(c) Unplug the wiring connector from the distributor.
(d) Using a dry cell battery (1.5 V), connect the positive
(+)
pole of the battery to the.pink wire terminal and
the negative (-) pole to the white wire terminal.
CAUTION: Do not apply voltage more than 5 seconds to
avoid destroying the power transistor in the igniter.
(e) Using a voltmeter, connect the positive
(+)
probe to
the yellow connector for the igniter side and the nega-
tive (-) probe to body ground.
Voltage: 8 - 10 V
If a problem is found, replace the igniter.
4. TURN IGNITION SWITCH OFF
5. REMOVE TEST EQUIPMENT AND RECONNECT
WIRING