SRX AWD V6-3.6L (2008)
Circuit/System Verification
Attempt to communicate with all modules on the high speed GMLAN bus.
If any high speed module communicates and any DTC beginning with a U exists, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Testing
and Inspection/Diagnostic Trouble Code Descriptions) .
If any high speed module communicates and no DTC beginning with a U exists, refer to DTC U0100-U0299 (See: Testing and Inspection/Diagnostic
Trouble Code Tests and Associated Procedures/U Code Charts/U0100) .
Circuit/System Testing
High Speed GMLAN Initial Test
1. Ignition OFF, test for less than 1.0 ohm of resistance between the data link connector (DLC) ground circuit terminal 5 and ground.
‹› If greater than the specified range, test the ground circuit for an open/high resistance.
2. Disconnect the 2 nd and 3 rd combs from the JX200 splice pack.
3. Install 3 amp fused jumper wires between the following JX200 terminals.
*
Terminal 21 and terminal 22
*
Terminal 32 and terminal 33
*
Terminal 12 and terminal 16
4. Ignition ON, attempt to communicate with the electronic suspension control module (ESC).
‹› If communication is established refer to DIAGNOSTIC 2.
‹› If communication is not established, refer to DIAGNOSTIC 1.
DIAGNOSTIC 1
1. Connect the JX200 splice pack combs.
2. Remove the terminator resistor located in the right rear cargo area.
3. Test for 108-132 ohms of resistance between terminals A and B of the terminator resistor.
‹› If not within the specified range, replace the resistor.
4. Connect the harness connector at the terminator resistor.
5. Ignition OFF, disconnect the X3 harness connector at the BCM.
6. Ignition OFF, test for less than 2 ohms of resistance between the DLC serial data circuit terminal 6 and BCM serial data circuit terminal 8.
‹› If greater than the specified range, test the serial data circuit for open/high resistance.
7. Ignition OFF, disconnect the X2 and X4 harness connectors at the BCM.
8. Test for less than 5 ohms of resistance between the following ground circuit terminals and ground.
*
X3 terminal 1
*
X3 terminal 5
*
X4 terminal 9
‹› If greater than the specified range, test the ground circuit for an open/high resistance.
9. Ignition ON, verify a test lamp illuminates between the following B+ circuit terminals and ground.
*
X2 terminal 2
*
X3 terminal 2
*
X3 terminal 3
*
X4 terminal 1
*
X4 terminal 2
*
X4 terminal 3
*
X4 terminal 4
*
X4 terminal 10
‹› If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit fuse is open, also test the
B+ output circuits for a short to ground.
10. Ignition OFF, test for infinite resistance between the following serial data circuits of the DLC and ground.
