please can someone help

[mike 850]

I have an 850 t5 manual with a starting problem, I think i have narrowed it down but I need help, can someone please check the resistance from the signal wire to the cam sensor(ecu side) to ground please

thanks

mike

[Kiss4afrog]

Step 7 seems to indicate 5 volts.

Code 3-1-4 (Camshaft Position Sensor Signal)
1) Check for other codes. If no other codes are present, go
to next step. If Codes 1-2-3, 4-1-1, and possibly 4-1-3 are stored,
check TP sensor, ECT sensor, camshaft position sensor, and EGR
temperature sensor connection at ECM connector terminal A18 for signs
of contact resistance and oxidation.
2) Using Volvo Scan Tool (998-8686) check status message to
determine whether fault is permanent or intermittent. If fault is
permanent, go to next step. If fault is intermittent, go to step 12).
3) Turn ignition off. Wait about 2 minutes. Disconnect
camshaft position sensor. Connect an ohmmeter between camshaft
position sensor connector terminal No. 1 and ground. If ohmmeter reads
about zero ohms, go to step 5). If ohmmeter does not read about zero
ohms, go to next step.
4) Turn ignition off. Disconnect ECM connector. Disconnect
camshaft position sensor connector. Ensure ECM connector terminals are
clean and free of oxidation. Reconnect ECM connector. Connect an
ohmmeter between camshaft position sensor terminal No. 1 and ground.
If ohmmeter reads about zero ohms, source of code is poor contact in
ECM connector. If ohmmeter does not read about zero ohms, check wiring
between camshaft position sensor connector terminal No. 1 and ECM
connector A18 for an open circuit.
5) Turn ignition on. Disconnect camshaft position sensor
connector. Connect voltmeter between camshaft position sensor
connector terminal No. 3 and ground. If battery voltage is present, go
to step 7). If battery voltage is not present, go to next step.
6) Turn ignition off. Disconnect camshaft position sensor.
Ensure ECM connector terminals are clean and free of oxidation.
Reconnect ECM. Turn ignition on. Connect voltmeter between camshaft
position sensor connector terminal No. 3 and ground. If voltmeter
shows battery voltage, source of DTC is poor contact in ECM connector.
If voltmeter does not show battery voltage, check wiring between CMP
sensor connector terminal No. 3 and ECM terminal A36 for an open
circuit.
7) Turn ignition on. Disconnect camshaft position sensor
connector. Connect voltmeter between camshaft position sensor
connector terminal No. 2 and ground. If voltmeter reads about 5 volts,
go to step 10). If voltmeter reads more than about 5 volts, check
wiring between camshaft position sensor connector terminal No. 2 and
ECM terminal A21 for a short circuit to voltage, then go to step 11).
If voltmeter reads less than about 5 volts, go to next step.
8) Turn ignition off. Wait about 2 minutes. Disconnect
camshaft position sensor. Connect an ohmmeter between camshaft
position sensor connector terminal No. 2 and ground. If ohmmeter reads
infinite resistance, go to next step. If ohmmeter reads about zero
ohms, check wiring between camshaft position sensor connector terminal
No. 2 and ECM connector terminal A21 for a short circuit to ground.
9) Turn ignition off. Disconnect camshaft position sensor.
Disconnect ECM connector. Ensure ECM connector terminals are clean and
free of oxidation. Reconnect ECM. Connect an ohmmeter between camshaft
position sensor connector terminal No. 2 and ground. If ohmmeter reads
.5-3 k/ohms, check for poor contact at ECM connector. If ohmmeter does
not read .5-3 k/ohms, check wiring between camshaft position sensor
connector terminal No. 2 and ECM connector terminal A21 for an open
circuit.
10) Reconnect camshaft position sensor. Attempt to start
engine. If engine starts, code is caused by poor contact at camshaft
position sensor connector or ECM connector. If engine starts, retest
using new camshaft position sensor.
11) Ensure camshaft position sensor is connected. If engine
starts, camshaft position sensor is okay. If engine does not start,
retest using new camshaft position sensor.
12) If fault is intermittent, check camshaft position sensor
and ECM connectors for loose connection, contact resistance, or
oxidation. Check wiring between camshaft position sensor connector
terminal No. 1 and ECM terminal A18 for an intermittent open circuit.
Check wiring between camshaft position sensor connector terminal No. 2
and ECM terminal A21 for an intermittent open circuit, short circuit
to ground, or short circuit to voltage. Also check wiring between
camshaft position sensor connector terminal No. 3 and ECM terminal A36
for an intermittent open circuit.