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Diagnostic Manual, Body and Accessories,
Volume 6

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LOCATION:

19.4 Roll Bar (RB) (Crash Deployment) > 23 Electrical Test Program - Test

Electrical Test Program - Test

Prior to Test:
1. Review

11,

12,

14,

21,

22 completely.

CAUTION!
Risk of severe injury, ensure that no persons are within the deployment radius of the roll bar during testing and repair.
Fully extend the roll bar prior to performing any repair work. Keep body parts away from the roll bar deployment radius and its mechanism.

CAUTION!
Risk of severe injury, to eyes and skin from escaping high pressure hydraulic fluid spray.
Risk of poisoning due to consumption of hydraulic fluid.
Depressurize the hydraulic system prior to performing repair work
Wear protective clothing and safety goggles.
Electrical wiring diagrams
See Electrical Troubleshooting Manual, Model 202/208, Volume 2,
Group 91

	Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0	Power soft top control module (N52) Voltage supply Circuit 30 (soft top electronics)	51 52	N52 N52	4 41		11 - 14 V 11 - 14 V	Wiring.
1.1	Left rear power window Circuit 30 Voltage supply	3	N52	40	Operate left rear window.	11 - 14 V 11 - 14 V	Wiring.
1.2	Right rear power window Circuit 30 Voltage supply	21	N52	38	Operate right rear window.	11 - 14 V 11 - 14 V	Wiring.
1.3	Voltage supply Circuit 15	51	N52	14	Ignition: ON	11 - 14 V	Wiring.
2.0	Power soft top control module (N52) Voltage of CAN data lines Voltage of CAN-LOW line Voltage of CAN-HIGH line			N52 19 37	Ignition: ON	3.2 V (oscillates) 1.8 V (oscillates)	Wiring, Control modules of CAN interior bus, Readout out DTC's via HHT. If values are OK: 2.1
2.1	Voltage between CAN-LOW and CAN-HIGH data lines	37	N52	19	Ignition: OFF Ignition: ON Ignition:OFF, After approx. 30 sec. (sleep mode)	-- 1.4 V 1.4 V 4.8V	Wiring, Control modules of CAN interior bus, Readout out DTC's via HHT.
3.0	RB switch (S83) (manual operation) Voltage supply and signal voltage			N52 54	Ignition: ON S83 at rest Press S83 in direction: "Extend" roll Bar Press S83 in direction: "Retract" roll bar	11 - 14 V Approx. 3.8 V 0 - 1 V	If only one value is not OK: S83 If all 3 values are: 11 - 14 V, then check: Wiring, S83, 3.1
3.1	Resistance			N52 54	Ignition: OFF Test cable disconnected at N52 S83 at rest Press S83 in direction: "Extend" roll bar Press S83 in direction: "Retract" roll bar	>20 k Approx. 250 Approx. 1	If only one value is not OK: S83 If one or two values are not OK: Wiring, or S83 If values are OK: N52
4.0	Voltage supply to indicator lamp in S83 from N52		N52	N52 7	Ignition: ON Switch not pressed	Indicator lamp illuminated. 11 - 14 V	N52 Values are OK, but indicator lamp does not illuminate: S83
5.0	Overload protection thermocouple (A7/5b1) at hydraulic unit (power soft top) Resistance measured at N52	32	N52	18	Test cable disconnected at N52 Ignition: OFF Pump temperature: 25°C 30°C 40°C 120°C	220±22k 178±18k 121±12.5k 10± 2k	Wiring, 5.1
5.1	Resistance as measured at Hydraulic unit connector (A7/5x1)	2	A7/5x1	1	Test cable disconnected at N52 Ignition: OFF Pump temperature: 25°C 30°C 40°C 120°C	220±22k 178±18k 121±12.5k 10± 2k	Overload protection thermo couple (A7/5b1).
6.0	Voltage supply of circuit 30, measured at relay socket of hydraulic unit (A7/5k1)	4	A7/5k1	2	A7/5k1 is disconnected.	11 - 14 V	Wiring, If values are OK: 6.1
6.1	Activation of A7/5k1 by N52 as measured at relay socket	4	A7/5k1	6	Roll bar: Retracted A7/5k1 disconnected. Turn ignition OFF and then ON. Press S83 in direction: "Extend" roll bar	11 - 14 V	Wiring, 6.2, If values are OK: 6.3
6.2	Activation of A7/5k1 by N52, measured at N52	52	N52	42	Roll bar: Retracted A7/5k1 connected. Socket box connected. Turn ignition OFF and then ON. Press S83 in direction: "Extend" roll bar	11 - 14 V	S83, N52 If values are OK: Wiring.
6.3	Voltage "load" during voltage supply of circuit 30, measured at relay socket	4	A7/5k1	2	Roll bar: Retracted A7/5k1 connected. Press S83 in direction: "Extend" roll bar	11 - 14 V	Wiring. If values are OK: 6.4
6.4	Voltage output of A7/5k1, as measured at relay socket	4	A7/5k1	8	Roll bar: Retracted A7/5k1 connected. Ignition: ON Press S83 in direction: "Extend" roll bar	11 - 14 V	A7/5k1
7.0	Resistance of Hydraulic motor (A7/5m1) as measured at relay socket		A7/5m1	A7/5k1 8	Disconnect A7/5k1 at RB hydraulic unit (power soft top) (A7/5). Ignition: OFF	Approx. 1	Wiring, A7/5m1
8.0	RB deployment solenoid (Y57/1) Resistance	53	N52	22	Ignition: OFF Test cable disconnected from N52	Approx. 1	Wiring, Y57/1 If values are OK: 8.1
8.1	Voltage supply from N52	52	N52	22	Test cable connected to N52 Ignition: ON	11 - 14 V	N52
9.0	RB "retracted" limit switch (S83/5) Voltage supply and signal voltage			N52 16	Ignition: ON Roll bar: Completely retracted Roll bar: Completely extended	0 - 1 V 11 - 14 V	If both values are not OK: N52 If only one of the values is not OK: 9.1
9.1	Resistance			N52 16	Ignition: OFF Test cable disconnected from N52 Roll bar: Completely retracted Roll bar: Completely extended	0 - 5 >20 k	Wiring, S83/5 If values are OK: N52
10.0	RB "extend" limit switch (S83/6) Voltage supply and signal voltage			N52 34	Ignition: ON Roll bar: Completely extended Roll bar: Completely retracted	0 - 1 V 11 - 14 V	If both values are not OK: N52 If only one of the values is not OK: 10.1
10.1	Resistance			N52 34	Ignition: OFF Test cable disconnected from N52 Roll bar: Completely extended Roll bar: Completely retracted	0 - 5 >20 k	Wiring, S83/6 If values are OK: N52

Connector layout - Power Soft Top Control Module (N52)
		P77.39-2001-10