PINPOINT TEST G532449p5 : ECM TO REM DRIVE CIRCUIT (V6 AND V8 VEHICLES WITHOUT SUPERCHARGER)

Pinpoint Tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE: When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account. Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G532449p5 : ECM TO REM DRIVE CIRCUIT (V6 AND V8 VEHICLES WITHOUT SUPERCHARGER)

G532449t23 : CHECK THE ECM TO REM DRIVE CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Disconnect the REM electrical connector, CR11.
2. Measure the resistance between:

REM connector CR11, Battery
harness side
Pin 19 Negative terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t24.

G532449t24 : CHECK THE ECM TO REM DRIVE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

REM connector CR11, Battery
harness side
Pin 19 Positive terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t22.

G532449t22 : CHECK THE ECM TO REM DRIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, EC300.
2. Measure the resistance between:

REM connector CR11, ECM connector EC300,
harness side harness side
Pin 19 Pin 20

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. CLEAR the DTC, test the system for normal operation.

-> NO
CHECK for DTCs indicating a REM or ECM fault.