Toyota 4-Runner 1985 Repair Manual page 290

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IGNITION SYSTEM -
On-Vehicle Inspection
[FOR 22R]
INSPECTION OF IGNITION COIL
1. DISCONNECT HIGH TENSION WIRE AND
IGNITION COIL CONNECTOR
2. CLEAN COIL AND CHECK FOLLOWING:
(a) Check for cracks or damage.
(b) Check the terminals for carbon tracks.
IG-5
(c) Check the high-tension wire hole for carbon deposits
and corrosion.
3. MEASURE PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive (
+ )
(brown side) and negative (-) (black side) ter-
minals.
Primary coil resistance (cold): 0.4 - 0.5
n
4. MEASURE SECONDARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the
positive
(+)
terminal (brown side) and the high tension
terminal.
Secondary coil resistance (cold): 8.5 - 11.5
kn
5. MEASURE INSULA liON RESISTANCE
Using an ohmmeter, measure the resistance between the
positive
(+)
terminal and the igniter body.
Insulation resistance: Infinity
If a problem with the coil is found, replace it.
6. CONNECT HIGH TENSION WIRE AND IGNITION COIL
CONNECTOR