Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Bosch

*** UPDATED BY TSB # 28104 DATED AUGUST 1991 [1]

COIL WIRE
Resistance value 2 - 3.5 ohms

CRANKSHAFT POSITION/SPEED SENSOR
Resistance values
# 1389399-5 (old type) [1]
240 ± 25 ohms at 68°F (20°C) 300 ± 25 ohms at 257°F (125°C)

# 1389399-5 (new type with white dot) [1]
170 ± 30 ohms at 68°F (20°C) 212 ± 30 ohms at 257°F (125°C)

# 3547847-8 [1]
170 ± 30 ohms at 68°F (20°C) 212 ± 30 ohms at 257°F (125°C)

DISTRIBUTOR ROTOR
Resistance value 5K ± 1K ohms

IGNITION COIL
Resistance values
Primary (terminals # 1 and # 15) 0.6 - 0.8 ohms
Secondary (terminals # 1 and high tension terminal) 6.9 - 8.5 ohms

SPARK PLUG WIRES
Resistance value 5.6K ± 1K ohms per meter

[1] During February 1991, EZ-116K impulse sensor, # 1389399-5, was superseded by sensor # 3547847-8. The new sensor has different specifications for fault tracing. Late production sensor # 1389399-5 has the same specification as sensor # 3547847-8, and is identified by a white dot on the connector. You must properly identify the sensor to ensure correct comparison of specifications.