Anti-Lock Quick Check Sheet Using EEC-IV 60-Pin Breakout Box

ANTI-LOCK QUICK CHECK SHEET USING EEC-IV 60-PIN BREAKOUT BOX

Item to Be Tested	Ignition Mode	Measure Between Pin Numbers	Tester Scale/Range	Specification	Pinpoint Test
Ignition Feed	OFF	23 and Chassis	DC Volts	0 V	Go To PINPOINT TEST A: NO COMMUNICATION WITH THE ANTI-LOCK BRAKE CONTROL MODULE .
Ignition Feed	ON	23 and Chassis	DC Volts	10 V min	Go To PINPOINT TEST A: NO COMMUNICATION WITH THE ANTI-LOCK BRAKE CONTROL MODULE .
LF Wheel Speed Sensor Resistance	OFF	10 and 1	Ohms	1,710-2,200 ohms	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
RF Wheel Speed Sensor Resistance	OFF	11 and 2	Ohms	1,710-2,200 ohms	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
RR Axle Speed Sensor Resistance	OFF	13 and 4	Ohms	1,710-2,200 ohms	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
LR Axle Speed Sensor Resistance	OFF	12 and 3	Ohms	1,710-2,200 ohms	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
Wheel Speed Sensor Continuity to Ground
LF	OFF	Chassis and 10	Continuity	No continuity	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
RF	OFF	Chassis and 11	Continuity	No continuity	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
RR	OFF	Chassis and 13	Continuity	No continuity	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
LR	OFF	Chassis and 12	Continuity	No continuity	Go To PINPOINT TEST G: DTC C1145 RF, C1155 LF, C1165 RR, C1175 LR - ANTI-LOCK BRAKE SENSOR INPUT FAILURE .
Wheel Speed Sensor Voltage: Rotate wheel at one revolution per second
LF	OFF	10 and 1	AC mVolts	300-3500 mV	Go To PINPOINT TEST J: DTCs C1233 LF, C1234 RF, C1235 RR, C1236 LR, C1222 - ANTI-LOCK BRAKE SENSOR SIGNAL MISSING OR ERRATIC, WHEEL SPEED MISMATCH .
RF	OFF	11 and 2	AC mVolts	300-3500 mV	Go To PINPOINT TEST J: DTCs C1233 LF, C1234 RF, C1235 RR, C1236 LR, C1222 - ANTI-LOCK BRAKE SENSOR SIGNAL MISSING OR ERRATIC, WHEEL SPEED MISMATCH .
RR	OFF	13 and 4	AC mVolts	300-3500 mV	Go To PINPOINT TEST J: DTCs C1233 LF, C1234 RF, C1235 RR, C1236 LR, C1222 - ANTI-LOCK BRAKE SENSOR SIGNAL MISSING OR ERRATIC, WHEEL SPEED MISMATCH .
LR	OFF	12 and 3	AC mVolts	300-3500 mV	Go To PINPOINT TEST J: DTCs C1233 LF, C1234 RF, C1235 RR, C1236 LR, C1222 - ANTI-LOCK BRAKE SENSOR SIGNAL MISSING OR ERRATIC, WHEEL SPEED MISMATCH .

Verify the customer concern by operating the vehicle and applying the brakes under different conditions to duplicate the condition.

Inspect to determine if one of the following mechanical or electrical concerns apply:

Visual Inspection Chart

VISUAL INSPECTION

Mechanical	Electrical
Parking brake cable binding Incorrectly inflated tires Mismatched wheels or tires on vehicle	Damaged Fuse(s): Battery junction box (BJB) Fuse 101 (40A) Fuse 102 (40A) Fuse junction panel Fuse 10 (10A) Damaged connectors or connections Circuitry open/shorted

If the inspection reveals an obvious concern(s) that can be readily identified, repair as required.
If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel 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 manual.
Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- SCP or ISO = all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for ABS module, Go To PINPOINT TEST A: NO COMMUNICATION WITH THE ANTI-LOCK BRAKE CONTROL MODULE .
- 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 to continue diagnostics.
If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART to continue diagnostics.