Inspection and Verification

Verify the customer concern.
Verify the stoplamps operate correctly by applying and releasing the brake pedal with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING . If the stoplamps operate correctly, proceed to the next step.

Visually inspect for obvious signs of mechanical or electrical damage:

VISUAL INSPECTION CHART

Mechanical	Electrical
Brake fluid level Tire inflation Wheel and tire sizes Steering components and suspension components Base brake system Wheel speed sensor ring HCU	Bussed electrical center (BEC) fuse(s): 7 (40A) 18 (10A) 65 (30A) Smart junction box (SJB) fuse 18 (10A) Circuitry Brake fluid level switch Stoplamp switch Wheel speed sensor Anti-lock brake system (ABS) module Traction control switch

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN or ISO circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for the ABS module, GO to PINPOINT TEST A .
- No response/not equipped for the SJB, MULTIFUNCTION ELECTRONIC MODULES .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the ABS module.
If the DTCs retrieved are related to the concern, go to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .

ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Source	Action
B1317	Battery Voltage High	ABS Module	GO to PINPOINT TEST B .
B1318	Battery Voltage Low	ABS Module	GO to PINPOINT TEST B .
B1342	ECU is Faulted	ABS Module	NOTE: If other DTCs are present, REPAIR them before installing a new module. CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. REPEAT the self-test.
C1093	Traction Control Switch Circuit Failure	Instrument Cluster	GO to PINPOINT TEST I .
C1095	ABS Hydraulic Pump Motor Circuit Failure	ABS Module	GO to PINPOINT TEST C .
C1096	ABS Hydraulic Pump Motor Circuit Open	ABS Module	GO to PINPOINT TEST C .
C1115	ABS Power Relay Output Short Circuit to Battery	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1115 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1145	Wheel Speed Sensor RF Input Circuit Failure	ABS Module	GO to PINPOINT TEST D .
C1155	Wheel Speed Sensor LF Input Circuit Failure	ABS Module	GO to PINPOINT TEST D .
C1165	Wheel Speed Sensor RR Input Circuit Failure	ABS Module	GO to PINPOINT TEST D .
C1175	Wheel Speed Sensor LR Input Circuit Failure	ABS Module	GO to PINPOINT TEST D .
C1185	ABS Power Relay Output Circuit Failure	ABS Module	CLEAR all DTCs. If DTC C1185 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1194	ABS Outlet Valve Coil LF Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1194 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1198	ABS Inlet Valve Coil LF Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1198 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1210	ABS Outlet Valve Coil RF Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1210 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1214	ABS Inlet Valve Coil RF Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1214 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1222	Wheel Speed Mismatch	ABS Module	GO to PINPOINT TEST E .
C1233	Wheel Speed LF Input Signal Missing	ABS Module	GO to PINPOINT TEST E .
C1234	Wheel Speed RF Input Signal Missing	ABS Module	GO to PINPOINT TEST E .
C1235	Wheel Speed RR Input Signal Missing	ABS Module	GO to PINPOINT TEST E .
C1236	Wheel Speed LR Input Signal Missing	ABS Module	GO to PINPOINT TEST E .
C1242	ABS Outlet Valve Coil LR Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1242 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1246	ABS Outlet Valve Coil RR Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1246 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1250	ABS Inlet Valve Coil LR Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1250 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1254	ABS Inlet Valve Coil RR Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1254 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1329	ABS Valve Outlet Coil Over RF Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1329 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1330	ABS Valve Outlet Coil Over LR Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1330 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1331	ABS Valve Outlet Coil Over RR Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1331 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1332	ABS Valve Outlet Coil Over LF Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1332 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1333	ABS Valve Inlet Coil Over RF Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1333 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1334	ABS Valve Inlet Coil Over LR Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1334 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1335	ABS Valve Inlet Coil Over RR Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1335 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1336	ABS Valve Inlet Coil Over LF Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1336 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1404	Traction Control Valve Rear Circuit Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1404 is retrieved again, INSTALL a new ABS module. INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1446	Brake Switch Circuit Failure	ABS Module	GO to PINPOINT TEST F .
C1527	ABS TC Valve Inlet Coil Over Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1527 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1531	ABS TC Valve Outlet Coil Over Temperature	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1531 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1730	Reference Voltage Out of Range (+5 V)	ABS Module	If any other DTC(s) are present, diagnose those DTC(s) first. CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
C1958	ABS TC Valve Outlet Coil Failure	ABS Module	CLEAR all DTCs. DRIVE the vehicle. If DTC C1958 is retrieved again, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article. CARRY OUT the self-test with the brake pedal not applied.
U0073	CAN Bus Off - Transmit Error	ABS Module	REFER to MODULE COMMUNICATIONS NETWORK .
U1900	CAN Communication Bus Fault - Receive Error	ABS Module	REFER to MODULE COMMUNICATIONS NETWORK .
U2011	Module Transmitted Invalid Data	ABS Module	VERIFY powertrain control module (PCM) configuration. If PCM is not correctly configured, CONFIGURE the PCM. If the PCM is correctly configured, REFER to MODULE COMMUNICATIONS NETWORK .