Test Z: Keep Alive Power (KAPWR)
PINPOINT TEST Z: KEEP ALIVE POWER (KAPWR)Flow Chart:
This pinpoint test is intended to diagnose the following:
- battery cables loose or intermittent connections
- harness circuit: KAPWR
- powertrain control module (PCM)
PCM Connector
PCM Connector:
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Z1 : PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODES (DTC)S P0606 AND P1633
NOTE: DTC P0606 may be set due to an intermittent engine oil temperature (EOT) sensor connector connection.
- Ignition ON, engine OFF.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON, engine OFF.
- Carry out the self-test.
- Are DTCs P0606 or P1633 present?
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Z2 : CHECK THE CHARGING SYSTEM
- Check the battery and charging system
- Is a concern present?
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Z3 : CHECK THE KAPWR CIRCUIT FOR VOLTAGE
- Ignition OFF.
- PCM connector disconnected.
- Measure the voltage between:
- Is the voltage greater than 10.5 V?
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Z4 : CHECK IF A DTC IS STILL PRESENT
- Ignition ON, engine OFF.
- Clear the DTCs.
- Carry out the self-test.
- Are DTCs P0606 or P1633 present?
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Z5 : CHECK FOR CORRECT EOT SENSOR CIRCUIT OPERATION
- EOT Sensor connector disconnected.
- Visually inspect for:
- pushed out pins
- corrosion
- Is a concern still present?
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Z6 : COMPARE THE EOT PID VALUE TO THE ECT PID VALUE
- EOT Sensor connector connected.
- Allow the engine temperature to stabilize
- Access the PCM and monitor the ECT PID.
- Access the PCM and monitor the EOT PID.
- Are the PIDS within 15°C (27°F) of each other?
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Z7 : CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
