Pinpoint Test

NOTE: When taking measurements at DCSM harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in DTCs and system failure. Touching the tip of these connector pins is recommended instead.

RETRIEVE ALL CMDTCs IN ALL MODULES
1. Ignition ON.
2. Using a scan tool, perform all CMDTCs self-test.
Is DTC B1317, B1318, B2486, B1676, U3003:16 or U3003:17 present in one or more modules and DTC P0562, P0563, P0620, P0625, P0626 or P065B present in the PCM?
1. Yes: REFER to DIAGNOSTIC ROUTINE A : System Voltage High, or REFER to DIAGNOSTIC ROUTINE B : System Voltage Low or Battery is Discharged.
2. No: GO to 2 .
CHECK THE BATTERY CONDITION
1. NOTE: DTC B1317, B1318, B2486, B1676, U3003:16 or U3003:17 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
  
  Ignition OFF.
2. Carry out the Battery Condition Test. REFER to DIAGNOSTIC ROUTINE A : Battery Condition Test.
Did the battery pass the condition test?
1. Yes: If the battery passed the condition test but required a recharge, REFER to DIAGNOSTIC ROUTINE B : System Voltage Low or Battery is Discharged.. CLEAR all CMDTCs . TEST the system for normal operation.
  If the battery passed the condition test and did not require a recharge, GO to 3 .
2. No: INSTALL a new battery. REFER to BATTERY . CLEAR all CMDTCs . TEST the system for normal operation.
CHECK THE CHARGING SYSTEM VOLTAGE
NOTE: Do not allow the engine speed to increase above 2, 000 rpm while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2, 000 rpm, shut the vehicle OFF and restart the engine before performing this step.
1. Start the engine.
2. Measure the voltage of the battery with and without a load on the charging system as follows:
  - Turn off all accessories and run the engine at 1, 500 rpm for a minimum of 2 minutes while measuring battery voltage.
  - Turn on headlights and HVAC fan on high and run engine at 1, 500 rpm for a minimum of 2 minutes while measuring battery voltage.
Are the voltages between 13 and 15.2 volts?
1. Yes: For DSM DTC B1317 or B1318, GO to 4 .
  For DCSM DTC B2486, GO to 7 .
2. No: REFER to DIAGNOSTIC ROUTINE A : System Voltage High, or REFER to DIAGNOSTIC ROUTINE B : System Voltage Low or Battery is Discharged. CLEAR all CMDTCs . TEST the system for normal operation.

CHECK FOR VOLTAGE TO THE DSM

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

Ignition OFF.
Connect: Driver Seat Side Air Bag C3051.
Disconnect: DSM C341A and C341B.
Ignition ON.

Measure:

DSM			Ground

C341A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
1	CBX05 (VT/RD)		-	Ground

DSM			Ground

C341B			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
1	CBX03 (BU/RD)		-	Ground

Are the voltages greater than 11 volts?

Yes: GO to 5 .
No: VERIFY BCM fuse 7 (7.5A) and BJB fuse 23 (30A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to OEM FUSE AND RELAY INFORMATION and OEM WIRING DIAGRAMS . CLEAR all CMDTCs . GO to 10 .

CHECK THE DSM GROUND CIRCUITS FOR AN OPEN

Ignition OFF.

Measure:

DSM			Ground

C341A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
2	GD906 (BK/GY)		-	Ground

DSM			Ground

C341B			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
24	GD905 (BK/GN)		-	Ground

Repeat this measurement while wiggling the harness.

Are the resistances less than 3 ohms?

Yes: GO to 6 .
No: REPAIR the circuit. CLEAR all CMDTCs . GO to 10 .

CHECK FOR CORRECT DSM OPERATION
1. Disconnect and inspect all DSM connectors.
2. Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins as necessary
  - pushed-out pins - install new pins as necessary
3. Reconnect the DSM connectors. Make sure they seat and latch correctly.
4. Operate the memory seat, mirrors and pedals to verify correct memory system operation.
5. Using the scan tool, perform DSM self-test.
Is DTC B1317 or B1318 still present?
1. Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new DSM. REFER to Driver Seat Module (DSM) . CLEAR all CMDTCs . GO to 10.
2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. GO to 10.

CHECK FOR VOLTAGE TO THE DCSM

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

Ignition OFF.
Connect: Passenger Seat Side Air Bag C339.
Disconnect: DCSM C3265A.
Ignition ON.

Measure:

DCSM			Ground

C3265A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
E	CBX01 (GN/RD)		-	Ground
F	CBX01 (GN/RD)		-	Ground

Are the voltages greater than 11 volts?

Yes: GO to 8 .
No: VERIFY the BJB fuse 28 (30A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to OEM FUSE AND RELAY INFORMATION and OEM WIRING DIAGRAMS . CLEAR all CMDTCs . GO to 10 .

CHECK THE DCSM GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

DCSM			Ground

C3265A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
M	GD903 (BK/WH)		-	Ground

Repeat this measurement while wiggling the harness.

Is the resistance less than 3 ohms?

Yes: GO to 9 .
No: REPAIR the circuit. CLEAR all CMDTCs . GO to 10 .

CHECK FOR CORRECT DCSM OPERATION
1. Ignition OFF.
2. Disconnect and inspect all DCSM connectors.
3. Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins as necessary
  - pushed-out pins - install new pins as necessary
4. Reconnect the DCSM connectors. Make sure they seat and latch correctly.
5. Start the engine.
6. Operate the climate controlled seats and verify system operation.
7. Using a scan tool, perform DCSM self-test.
Is DTC B2486 still present?
1. Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM) . GO to 10 .
2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. GO to 10 .
CHECK FOR SRS DTCs
1. WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
  
  Ignition OFF.
2. Connect: Driver Seat Side Air Bag C3051 (if previously disconnected).
3. Connect: Passenger Seat Side Air Bag C339 (if previously disconnected).
4. Connect all other previously disconnected connectors.
5. Ignition ON.
6. Using a scan tool, clear the RCM DTCs .
7. Cycle the ignition OFF then ON.
8. Using a scan tool, perform RCM self-test.
Are any RCM DTCs retrieved during self-test?
1. Yes: REFER to DTC CHART: RESTRAINT CONTROL MODULE (RCM) for pinpoint test direction.
2. No: The repair is complete. RETURN the vehicle to the customer.