Check the Supplies and Grounds to the Rear Memory Module (RMM)

: CHECK THE SUPPLIES AND GROUNDS TO THE REAR MEMORY MODULE (RMM)

G239843t75 : CHECK THE PERMANENT SUPPLY (1) TO THE REM
1. Disconnect the RMM electrical connector, CR41.
2. Measure the voltage between CR41, pin 06 (NR) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the RMM and battery. This circuit includes the rear power distribution box (fuse 21). TEST the system for normal operation.

-> No

G239843t76 : CHECK THE PERMANENT SUPPLY (2) TO THE REM
1. Reconnect the RMM electrical connector, CR41.
2. Disconnect the RMM electrical connector, CR59.
3. Measure the voltage between CR59, pin 02 (NG) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the RMM and battery. This circuit includes the rear power distribution box (fuse 09). TEST the system for normal operation.

-> No

G239843t77 : CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE RMM
1. Reconnect the RMM electrical connector, CR59.
2. Disconnect the RMM electrical connector, CR37.
3. Make sure the SSP relay is energized.
4. Measure the voltage between CR37, pin 13 (NG) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the RMM and battery. This circuit includes the primary junction box (fuse 21) and the SSP relay. TEST the system for normal operation.

-> No

G239843t78 : CHECK THE LOGIC GROUND TO THE RMM
1. Measure the resistance between CR37, pin 26 (BK) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. TEST the system for normal operation.

-> No

G239843t79 : CHECK THE MOTOR GROUNDS TO THE RMM
1. Reconnect the RMM electrical connector, CR37.
2. Disconnect the RMM electrical connector, CR59.
3. Disconnect the RMM electrical connector, CR41.
4. Measure the resistance between CR59, pin 01 (B) and GROUND.
5. Measure the resistance between CR41, pin 05 (B) and GROUND.

- Is either resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. TEST the system for normal operation.

-> No
CHECK for DTCs indicating a network or module fault. REFER to the DTC index.