2004 3.7 Dakota, No bus no crank
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Registered User
Joined: Nov 2019
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2004 3.7 Dakota, No bus no crank
The truck randomly shut off as I was driving.
- No gauges work
- No bus on odometer
- Does not crank
- I've checked all fuses and relays, starter cranks if relay is jumped, fuel pump works if relay is jumped, jumping the ASD does nothing.
replaced camshaft postion sensor.
- all grounds on PCM pins get 12v
- unplugged Crank, Cam, MAP, TPS, Oil presure sensors, made no difference.
Cam plug outer pins get 5v, 4.90-5v, middle ground pin gets 12v
I get the same voltages for Crank, TPS sensors.
I could get the MAP sensor off, it looks melted, so i cut the wires, still no bus no crank. MAP wires get 5v, 12v ground, 4.90-5v signal.
- No gauges work
- No bus on odometer
- Does not crank
- I've checked all fuses and relays, starter cranks if relay is jumped, fuel pump works if relay is jumped, jumping the ASD does nothing.
replaced camshaft postion sensor.
- all grounds on PCM pins get 12v
- unplugged Crank, Cam, MAP, TPS, Oil presure sensors, made no difference.
Cam plug outer pins get 5v, 4.90-5v, middle ground pin gets 12v
I get the same voltages for Crank, TPS sensors.
I could get the MAP sensor off, it looks melted, so i cut the wires, still no bus no crank. MAP wires get 5v, 12v ground, 4.90-5v signal.
Thread Starter
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Registered User
Joined: Nov 2019
Posts: 2
Likes: 0
Problem solved.
PIN 11 FUSED IGNITION SWITCH OUTPUT
PIN 12 FUSED IGNITION SWITCH OUTPUT (OFF-RUN-START)
on PCM C1 plug
both pins should get 12v with key on position, my pin 11 was not getting 12v, so i cut the wire and jumped 12v to it.Truck started and no bus is gone.
PIN 11 FUSED IGNITION SWITCH OUTPUT
PIN 12 FUSED IGNITION SWITCH OUTPUT (OFF-RUN-START)
on PCM C1 plug
both pins should get 12v with key on position, my pin 11 was not getting 12v, so i cut the wire and jumped 12v to it.Truck started and no bus is gone.
