Diagnostic Aids

Monitor voltage of each terminal while moving related harness connectors, including PCM harness. If fault is induced, voltage will change. This may help locate intermittent problems. If code reappears with no apparent problems, replace PCM.

Fig 1: Code 26, Schematic, Quad-Driver Ckt, Riviera

Fig 2: Code 26, Schematic, Quad-Driver Ckt, Toronado & Trofeo

Fig 3: Code 26, Flow Chart, Quad-Driver Ckt, (1 of 3)

Fig 4: Code 26 Flow Chart

Fig 5: Code 26, Flow Chart, Quad-Driver Ckt, (2 of 3)

Fig 6: Code 26 Flow Chart

Fig 7: Code 26, Flow Chart, Quad-Driver Ckt, (3 of 3)

Fig 8: Code 26 Flow Chart