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Home >> Jaguar >> 1987 >> XJ-SC >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - LUCAS/BOSCH "P" >> Testing >> Cold Start System >> Engine Temperature Above 59°F (15°C)

Engine Temperature Above 59°F (15°C)

  1. Crank engine and check voltage at terminal No. 87 of cold start relay. Voltage should be 0 volts. If battery voltage is present, remove wiring harness connector from terminal No. 85 of the cold start relay.
  2. If voltage is 0 volts, the thermo time switch is at fault and must be replaced. If battery voltage is still present at terminal No. 87 after disconnecting terminal No. 85, the replace the cold start relay.
  3. If cold start injectors pass fuel when no voltage is present at terminal 87, the injectors must be replaced.
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