Isuzu 1999 RODEO Workshop Manual page 847

6E1–220 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
be set occurs. This may assist in diagnosing the
condition.
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 1. Disconnect the CKP sensor.
2. Ignition ON.
3. Using a Digital Voltmeter (DVM), verify that 5 V
reference and ground are being supplied at the
sensor connector (PCM side).
Are 5 V and ground being supplied to the sensor?
3 1. Ignition ON.
2. With a DVM, backprobe the PCM connector 5 V
reference and ground connections.
Are 5 V reference and ground available at the PCM?
4 Check 5 V reference or ground between the CKP
sensor and PCM and repair the open circuit, short to
ground or short to voltage.
Is the action complete?
5 1. Ignition OFF.
2. Disconnect the PCM and CKP sensor.
3. Check for an open or a short to ground in the 58X
reference circuit between the CKP sensor
connector and the PCM harness connector.
4. If a problem is found, repair as necessary.
Was a problem found?
6 1. Reconnect the PCM and CKP sensor.
2. Connect a DVM to measure voltage on the 58X
reference circuit at the PCM connector.
3. Observe the voltage while cranking the engine.
Is the voltage near the specified value?
7 Check the connections at the CKP sensor and replace
the terminals if necessary.
Did any terminals require replacement?
8 Replace the CKP sensor.
IMPORTANT: The PCM must go through the Scan
Tool's Tooth Error Correction (TEC) procedure after a
CKP Sensor replacement.
Correction (TEC) procedure.
Is the action complete?
DTC P0337 – CKP Sensor Circuit Low Input
Action
Refer to Tooth Error
Value(s) Yes
— Go to Step 2
— Go to Step 5
— Go to Step 4
— Verify repair
— Verify repair
2.5 V Go to Step 9
— Verify repair
— Verify repair
No
Go to OBD
System
Check
Go to Step 3
Go to Step 9
—
Go to Step 6
Go to Step 7
Go to Step 8
—