Operation CHARM: Car repair manuals for everyone.

System Specifications


Canister Purge Valve Resistance 25 ohms
Oxygen Sensor Heater Resistance 3 ohms (cold) 13 ohms (hot)
Oxygen Sensor Operating Voltage (engine running) 0.4 - 1.0 volts
Oxygen Sensor Heating Element current draw 0.5 - 1.3 A


Tune-up Specifications

Firing Order 1-3-4-2
Idle Speed 900-950 RPM [1] 900-1000 RPM [2]
Timing 10° BTDC
Fuel Mixture 1.3%±0.03% @ 900-950 RPM [3]
Fuel Mixture 7.2±0.2 volts @ 900-950 RPM [4]

[1] Manual Transmission
[2] Automatic Transmission
[3] Sample taken before the catalytic converter, the oxygen sensor disconnected, and the 60° C Thermocontact wires bridged.
[4] At test terminal 22, and oxygen sensor connected